Al–Cu system

107 accepted literature values from 3 paper(s) (experimental 50, model 54, unspecified 3); 5 calculated phase diagram(s). 7 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (23) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	50
model	54
unspecified	3

Accepted values by property group
Property group	Values
invariant reaction	80
phase transition	5
phase equilibrium	22

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
AlCu-02Mie.tdb	J. Miettinen, Metall. Mater. Trans. A, 33A, 1639-48(2002). doi:10.1007/s11661-002-0173-7	`3831fc8d892fc0774d0046cd1457b5b070abf879e8bade51373a758f8eca21c1`	viewer · TDB · JSON
AlCu-04Wit.tdb	V. Witusiewicz, U. Hecht, S.G. Fries, S. Rex, J. Alloys Compd., 385, 133-43(2004). doi:10.1016/j.jallcom.2004.04.126	`7239fc4da5e79f401db2a379dc38258c2554f6de7a1fc7d74b57bf391fba19f9`	viewer · TDB · JSON
AlCu-15Lia.tdb	S.-M. Liang, R. Schmid-Fetzer, Calphad, 51, 252-60(2015). doi:10.1016/j.calphad.2015.10.004	`cc9baa9f2479820ca73d3b8655ba619569f8f6e78c02539c51e79dd98d73dd74`	viewer · TDB · JSON
AlCu-21Kro.tdb	A. Kroupa, O. Zobac, K.W. Richter, J. Mater. Sci., 56, 3430-43(2021). doi:10.1007/s10853-020-05423-7	`bd06016e51db2bef626a65b9f3a00b660e9b1c8a7c8c10e4d0ad8867809c62e4`	viewer · TDB · JSON
AlCu-98Sau-LB.tdb	N. Saunders, COST 507, Final report round 2, 1998	`bed1eea6f6cf10b8c9b80e3c1bc04f3c129893a8205650098d464a12e718d0c9`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AlCu-02Mie.tdb	1309.88	BCC_A2 (x(Cu) 0.81606) + LIQUID (x(Cu) 0.82883) + FCC_A1 (x(Cu) 0.84683)
AlCu-02Mie.tdb	1293.77	LIQUID (x(Cu) 0.65769) + AL4CU9_GAMMA (x(Cu) 0.67532) + BCC_A2 (x(Cu) 0.68151)
AlCu-02Mie.tdb	1266.67	LIQUID (x(Cu) 0.609) + BCC_A2 (x(Cu) 0.64369) + AL4CU9_GAMMA (x(Cu) 0.66064)
AlCu-02Mie.tdb	1015.23	LIQUID (x(Cu) 0.28591) + HCP_A3 (x(Cu) 0.37287) + BCC_A2 (x(Cu) 0.4073)
AlCu-02Mie.tdb	881.09	FCC_A1 (x(Cu) 0.05384) + LIQUID (x(Cu) 0.11317) + HCP_A3 (x(Cu) 0.26592)
AlCu-02Mie.tdb	840.04	AL4CU9_GAMMA (x(Cu) 0.70148) + BCC_A2 (x(Cu) 0.76202) + FCC_A1 (x(Cu) 0.80278)
AlCu-02Mie.tdb	747.05	FCC_A1 (x(Cu) 0.04188) + HCP_A3 (x(Cu) 0.27711) + BCC_A2 (x(Cu) 0.32085)
AlCu-04Wit.tdb	1309.3	BCC_A2 (x(Cu) 0.80735) + LIQUID (x(Cu) 0.81688) + FCC_A1 (x(Cu) 0.83661)
AlCu-04Wit.tdb	1292.18	LIQUID (x(Cu) 0.67896) + AL4CU9_D82 (x(Cu) 0.68444) + BCC_A2 (x(Cu) 0.69914)
AlCu-04Wit.tdb	1232.3	LIQUID (x(Cu) 0.60403) + BCC_A2 (x(Cu) 0.64408) + AL4CU9_D82 (x(Cu) 0.66738)
AlCu-04Wit.tdb	1149.87	BCC_A2 (x(Cu) 0.62518) + AL4CU9_D83 (x(Cu) 0.64702) + AL4CU9_D82 (x(Cu) 0.65575)
AlCu-04Wit.tdb	1124.24	LIQUID (x(Cu) 0.52) + ALCU_B82 (x(Cu) 0.57657) + BCC_A2 (x(Cu) 0.58494)
AlCu-04Wit.tdb	1109.55	ALCU_B82 (x(Cu) 0.58042) + BCC_A2 (x(Cu) 0.60219) + AL4CU9_D83 (x(Cu) 0.63537)
AlCu-04Wit.tdb	1054.45	AL4CU9_D83 (x(Cu) 0.68679) + AL4CU9_D82 (x(Cu) 0.6888) + BCC_A2 (x(Cu) 0.73202)
AlCu-04Wit.tdb	959.78	ALCU_B82 (x(Cu) 0.57153) + AL2CU3 (x(Cu) 0.6) + AL4CU9_D83 (x(Cu) 0.62784)
AlCu-04Wit.tdb	898.11	LIQUID (x(Cu) 0.34904) + ALCU_ETA (x(Cu) 0.50971) + ALCU_B82 (x(Cu) 0.54073)
AlCu-04Wit.tdb	868.85	LIQUID (x(Cu) 0.32199) + AL2CU_C16 (x(Cu) 0.32878) + ALCU_ETA (x(Cu) 0.50584)
AlCu-04Wit.tdb	855.85	AL9CU11 (x(Cu) 0.55) + ALCU_B82 (x(Cu) 0.55605) + AL2CU3 (x(Cu) 0.6)
AlCu-04Wit.tdb	852.41	ALCU_ETA (x(Cu) 0.51097) + ALCU_B82 (x(Cu) 0.54252) + AL9CU11 (x(Cu) 0.55)
AlCu-04Wit.tdb	837.81	AL4CU9_D83 (x(Cu) 0.69127) + BCC_A2 (x(Cu) 0.77116) + FCC_A1 (x(Cu) 0.7948)
AlCu-04Wit.tdb	820.61	FCC_A1 (x(Cu) 0.02536) + LIQUID (x(Cu) 0.17473) + AL2CU_C16 (x(Cu) 0.31756)
AlCu-15Lia.tdb	1308.24	BCC_A2 (x(Cu) 0.80815) + LIQUID (x(Cu) 0.81797) + FCC_A1 (x(Cu) 0.83749)
AlCu-15Lia.tdb	1286.31	LIQUID (x(Cu) 0.66927) + GAMMA_D82 (x(Cu) 0.688) + BCC_A2 (x(Cu) 0.69177)
AlCu-15Lia.tdb	1232.41	LIQUID (x(Cu) 0.60403) + BCC_A2 (x(Cu) 0.64402) + GAMMA_D82 (x(Cu) 0.6654)
AlCu-15Lia.tdb	1145.67	BCC_A2 (x(Cu) 0.6108) + GAMMA_D83 (x(Cu) 0.64518) + GAMMA_D82 (x(Cu) 0.64857)
AlCu-15Lia.tdb	1121.88	ALCU_B82 (x(Cu) 0.59651) + BCC_A2 (x(Cu) 0.59776) + GAMMA_D83 (x(Cu) 0.6397)
AlCu-15Lia.tdb	1119.71	LIQUID (x(Cu) 0.51685) + BCC_A2 (x(Cu) 0.58279) + ALCU_B82 (x(Cu) 0.59092)
AlCu-15Lia.tdb	1063.82	GAMMA_D83 (x(Cu) 0.69338) + GAMMA_D82 (x(Cu) 0.69798) + BCC_A2 (x(Cu) 0.73794)
AlCu-15Lia.tdb	957.8	ALCU_B82 (x(Cu) 0.58803) + AL5CU8 (x(Cu) 0.61538) + GAMMA_D83 (x(Cu) 0.63036)
AlCu-15Lia.tdb	898.18	LIQUID (x(Cu) 0.34582) + ALCU_ETA_1 (x(Cu) 0.51225) + ALCU_B82 (x(Cu) 0.54133)
AlCu-15Lia.tdb	871.03	ALCU_ETA_1 (x(Cu) 0.51178) + ALCU_ETA_2 (x(Cu) 0.52) + ALCU_B82 (x(Cu) 0.5403)
AlCu-15Lia.tdb	866.41	LIQUID (x(Cu) 0.31855) + AL2CU_C16 (x(Cu) 0.32853) + ALCU_ETA_1 (x(Cu) 0.50934)
AlCu-15Lia.tdb	853.57	ALCU_ETA_2 (x(Cu) 0.52) + ALCU_B82 (x(Cu) 0.54156) + AL9CU11 (x(Cu) 0.55117)
AlCu-15Lia.tdb	846.87	AL2CU_C16 (x(Cu) 0.32935) + ALCU_ETA_1 (x(Cu) 0.50891) + ALCU_ETA_2 (x(Cu) 0.52)
AlCu-15Lia.tdb	840.61	GAMMA_D83 (x(Cu) 0.69906) + BCC_A2 (x(Cu) 0.77116) + FCC_A1 (x(Cu) 0.79478)
AlCu-15Lia.tdb	830.82	AL9CU11 (x(Cu) 0.5574) + ALCU_B82 (x(Cu) 0.57033) + AL5CU8 (x(Cu) 0.61538)
AlCu-15Lia.tdb	820.86	FCC_A1 (x(Cu) 0.02503) + LIQUID (x(Cu) 0.177) + AL2CU_C16 (x(Cu) 0.31753)
AlCu-15Lia.tdb	636.16	GAMMA_D83 (x(Cu) 0.69278) + ALCU3_D022 (x(Cu) 0.77) + FCC_A1 (x(Cu) 0.80715)
AlCu-21Kro.tdb	1315.84	BCC_A2 (x(Cu) 0.80898) + LIQUID (x(Cu) 0.8215) + FCC_A1 (x(Cu) 0.83856)
AlCu-21Kro.tdb	1268.2	LIQUID (x(Cu) 0.62527) + GAMMA_D82 (x(Cu) 0.65832) + BCC_A2 (x(Cu) 0.65873)
AlCu-21Kro.tdb	1215.25	LIQUID (x(Cu) 0.57877) + BCC_A2 (x(Cu) 0.62608) + GAMMA_D82 (x(Cu) 0.64818)
AlCu-21Kro.tdb	1144.12	BCC_A2 (x(Cu) 0.60921) + GAMMA_D83 (x(Cu) 0.63669) + GAMMA_D82 (x(Cu) 0.64361)
AlCu-21Kro.tdb	1119.99	BCC_A2 (x(Cu) 0.59091) + ALCU_B82 (x(Cu) 0.60043) + GAMMA_D83 (x(Cu) 0.63081)
AlCu-21Kro.tdb	1115.47	LIQUID (x(Cu) 0.51473) + BCC_A2 (x(Cu) 0.58228) + ALCU_B82 (x(Cu) 0.59685)
AlCu-21Kro.tdb	1050.72	GAMMA_D83 (x(Cu) 0.67562) + GAMMA_D82 (x(Cu) 0.69009) + BCC_A2 (x(Cu) 0.72864)
AlCu-21Kro.tdb	955.01	ALCU_B82 (x(Cu) 0.58413) + AL5CU8 (x(Cu) 0.60346) + GAMMA_D83 (x(Cu) 0.62085)
AlCu-21Kro.tdb	897.67	LIQUID (x(Cu) 0.3624) + ALCU_ETA_HT (x(Cu) 0.5165) + ALCU_B82 (x(Cu) 0.5491)
AlCu-21Kro.tdb	871.89	ALCU_ETA_HT (x(Cu) 0.51557) + ALCU_ETA_LT (x(Cu) 0.52868) + ALCU_B82 (x(Cu) 0.54824)
AlCu-21Kro.tdb	866.11	LIQUID (x(Cu) 0.33538) + AL2CU_C16 (x(Cu) 0.33668) + ALCU_ETA_HT (x(Cu) 0.51263)
AlCu-21Kro.tdb	851.03	AL3CU4_HT (x(Cu) 0.561) + ALCU_B82 (x(Cu) 0.56589) + AL5CU8 (x(Cu) 0.59596)
AlCu-21Kro.tdb	851.03	AL3CU4_HT (x(Cu) 0.561) + ALCU_B82 (x(Cu) 0.56588) + AL5CU8 (x(Cu) 0.59596)
AlCu-21Kro.tdb	846.77	AL2CU_C16 (x(Cu) 0.3367) + ALCU_ETA_HT (x(Cu) 0.51175) + ALCU_ETA_LT (x(Cu) 0.52065)
AlCu-21Kro.tdb	841.09	ALCU_ETA_LT (x(Cu) 0.53157) + ALCU_B82 (x(Cu) 0.5514) + AL3CU4_HT (x(Cu) 0.561)
AlCu-21Kro.tdb	841.09	ALCU_ETA_LT (x(Cu) 0.53158) + ALCU_B82 (x(Cu) 0.55141) + AL3CU4_HT (x(Cu) 0.561)
AlCu-21Kro.tdb	840.58	GAMMA_D83 (x(Cu) 0.68976) + BCC_A2 (x(Cu) 0.77427) + FCC_A1 (x(Cu) 0.79752)
AlCu-21Kro.tdb	833.46	AL3CU4_HT (x(Cu) 0.561) + AL3CU4_LT (x(Cu) 0.573) + AL5CU8 (x(Cu) 0.59816)
AlCu-21Kro.tdb	833.46	AL3CU4_HT (x(Cu) 0.561) + AL3CU4_LT (x(Cu) 0.573) + AL5CU8 (x(Cu) 0.59817)
AlCu-21Kro.tdb	833.46	AL3CU4_HT (x(Cu) 0.561) + AL3CU4_LT (x(Cu) 0.573) + AL5CU8 (x(Cu) 0.5982)
AlCu-21Kro.tdb	821.67	FCC_A1 (x(Cu) 0.02129) + LIQUID (x(Cu) 0.18101) + AL2CU_C16 (x(Cu) 0.31631)
AlCu-21Kro.tdb	645.25	ALCU_ETA_LT (x(Cu) 0.51835) + AL3CU4_HT (x(Cu) 0.561) + AL3CU4_LT (x(Cu) 0.573)
AlCu-21Kro.tdb	645.25	ALCU_ETA_LT (x(Cu) 0.51832) + AL3CU4_HT (x(Cu) 0.561) + AL3CU4_LT (x(Cu) 0.573)
AlCu-21Kro.tdb	645.25	ALCU_ETA_LT (x(Cu) 0.51831) + AL3CU4_HT (x(Cu) 0.561) + AL3CU4_LT (x(Cu) 0.573)
AlCu-21Kro.tdb	626.61	GAMMA_D83 (x(Cu) 0.69317) + ALCU3_D022 (x(Cu) 0.77) + FCC_A1 (x(Cu) 0.82081)
AlCu-98Sau-LB.tdb	1309.28	BCC_A2 (x(Cu) 0.80735) + LIQUID (x(Cu) 0.81758) + FCC_A1 (x(Cu) 0.83661)
AlCu-98Sau-LB.tdb	1293.41	LIQUID (x(Cu) 0.67866) + AL4CU9_D82 (x(Cu) 0.68438) + BCC_A2 (x(Cu) 0.69878)
AlCu-98Sau-LB.tdb	1232.38	LIQUID (x(Cu) 0.60388) + BCC_A2 (x(Cu) 0.6441) + AL4CU9_D82 (x(Cu) 0.66739)
AlCu-98Sau-LB.tdb	1150.5	BCC_A2 (x(Cu) 0.62532) + AL4CU9_D83 (x(Cu) 0.64706) + AL4CU9_D82 (x(Cu) 0.65585)
AlCu-98Sau-LB.tdb	1124.07	LIQUID (x(Cu) 0.51961) + ALCU_B82 (x(Cu) 0.57665) + BCC_A2 (x(Cu) 0.5853)
AlCu-98Sau-LB.tdb	1109.32	ALCU_B82 (x(Cu) 0.58046) + BCC_A2 (x(Cu) 0.60236) + AL4CU9_D83 (x(Cu) 0.63548)
AlCu-98Sau-LB.tdb	1054.21	AL4CU9_D83 (x(Cu) 0.68683) + AL4CU9_D82 (x(Cu) 0.68881) + BCC_A2 (x(Cu) 0.73204)
AlCu-98Sau-LB.tdb	959.7	ALCU_B82 (x(Cu) 0.57152) + AL2CU3 (x(Cu) 0.6) + AL4CU9_D83 (x(Cu) 0.62782)
AlCu-98Sau-LB.tdb	898.08	LIQUID (x(Cu) 0.34567) + ALCU_ETA (x(Cu) 0.50971) + ALCU_B82 (x(Cu) 0.54073)
AlCu-98Sau-LB.tdb	869.01	LIQUID (x(Cu) 0.31857) + AL2CU_C16 (x(Cu) 0.32877) + ALCU_ETA (x(Cu) 0.50585)
AlCu-98Sau-LB.tdb	855.85	AL9CU11 (x(Cu) 0.55) + ALCU_B82 (x(Cu) 0.55605) + AL2CU3 (x(Cu) 0.6)
AlCu-98Sau-LB.tdb	852.41	ALCU_ETA (x(Cu) 0.51097) + ALCU_B82 (x(Cu) 0.54252) + AL9CU11 (x(Cu) 0.55)
AlCu-98Sau-LB.tdb	837.88	AL4CU9_D83 (x(Cu) 0.69121) + BCC_A2 (x(Cu) 0.77116) + FCC_A1 (x(Cu) 0.79481)
AlCu-98Sau-LB.tdb	820.74	FCC_A1 (x(Cu) 0.02539) + LIQUID (x(Cu) 0.17485) + AL2CU_C16 (x(Cu) 0.31755)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull AlCu-02Mie · CALPHAD hull AlCu-04Wit · CALPHAD hull AlCu-15Lia · CALPHAD hull AlCu-98Sau-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Al–Cu system (80)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1315.85	eutectic: liq -> β + (Cu)	liq: Cu 0.822; β: Cu 0.809; (Cu): Cu 0.839	model	[1] Kroupa 2021	Table 5, p. 11, row 4 report
1310.15	Fcc-liquid-bcc	Fcc: Cu 0.847; L: Cu 0.829; bcc: Cu 0.816	model	[2] Miettinen 2002	Table III, p. 4, row 3 report
1309.3	eutectic: Liquid -> bcc-A2 + fcc-A1	Liquid: Cu 0.817; bcc-A2: Cu 0.807; fcc-A1: Cu 0.837	model	[3] (ed.) 1998	Table I, p. 48, row 7 report
1309.15	Fcc-liquid-bcc	Fcc: Cu 0.837; L: Cu 0.817; bcc: Cu 0.807	model	[2] Miettinen 2002 cites Ansara 1998	Table III, p. 4, row 2 report
1308.25	eutectic: liq -> β + (Cu)		model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 6 report
1308.15	eutectic: liq -> β + (Cu)		experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 5 report
1305.15	Fcc-liquid-bcc	Fcc: Cu 0.844; L: Cu 0.83; bcc: Cu 0.82	experimental	[2] Miettinen 2002 cites Murray 1985 doi	Table III, p. 4, row 1 report
1295.15	Bcc-γ-liquid	Bcc: Cu 0.676; γ: Cu 0.674; L: Cu 0.661	experimental	[2] Miettinen 2002 cites Murray 1985 doi	Table III, p. 4, row 4 report
1294.15	Bcc-γ-liquid	Bcc: Cu 0.682; γ: Cu 0.675; L: Cu 0.658	model	[2] Miettinen 2002	Table III, p. 4, row 6 report
1293.4	peritectic: Liquid + bcc-A2 -> AlCu-γ(H)	Liquid: Cu 0.678; bcc-A2: Cu 0.698; AlCu-γ(H): Cu 0.684	model	[3] (ed.) 1998	Table I, p. 48, row 6 report
1293.15	Bcc-γ-liquid	Bcc: Cu 0.698; γ: Cu 0.684; L: Cu 0.678	model	[2] Miettinen 2002 cites Ansara 1998	Table III, p. 4, row 5 report
1286.35	liq + β -> γ		model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 10 report
1268.15	liq + β -> γ	liq: Cu 0.625; β: Cu 0.659; γ: Cu 0.658	model	[1] Kroupa 2021	Table 5, p. 11, row 7 report
1266.15	liq + β -> γ		experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 9 report
1264.15	liq + β -> γ		experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 8 report
1233.15	liq + γ -> ε		experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 13 report
1232.45	liq + γ -> ε		model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 14 report
1232.4	peritectic: Liquid + AlCu-γ(H) -> bcc-A2	Liquid: Cu 0.604; AlCu-γ(H): Cu 0.667; bcc-A2: Cu 0.644	model	[3] (ed.) 1998	Table I, p. 48, row 5 report
1232.15	liq + γ -> ε		experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 12 report
1215.25	liq + γ -> ε	liq: Cu 0.579; γ: Cu 0.648; ε: Cu 0.626	model	[1] Kroupa 2021	Table 5, p. 11, row 11 report
1150.5	peritectoid: bcc-A2 + AlCu-γ(H) -> AlCu-γ(D83)	bcc-A2: Cu 0.625; AlCu-γ(H): Cu 0.656; AlCu-γ(D83): Cu 0.647	model	[3] (ed.) 1998	Table I, p. 48, row 10 report
1147.15	γ + ε -> γ′ (ord.)		experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 17 report
1146.65	γ + ε -> γ′ (ord.)		experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 16 report
1145.65	γ + ε -> γ′ (ord.)		model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 18 report
1144.15	γ + ε -> γ′ (ord.)	γ: Cu 0.644; ε: Cu 0.609; γ′: Cu 0.637	model	[1] Kroupa 2021	Table 5, p. 11, row 15 report
1124	peritectic: Liquid + bcc-A2 -> AlCu-ε	Liquid: Cu 0.519; bcc-A2: Cu 0.585; AlCu-ε: Cu 0.576	model	[3] (ed.) 1998	Table I, p. 48, row 4 report
1121.85	γ′ + ε -> ε′	ε′: Cu 0.5	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 22 report
1120.15	ε -> liq + ε′	ε′: Cu 0.5	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 25 report
1120.15	γ′ + ε -> ε′	ε′: Cu 0.5	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 21 report
1119.95	γ′ + ε -> ε′	γ′: Cu 0.631; ε: Cu 0.591; ε′: Cu 0.6	model	[1] Kroupa 2021	Table 5, p. 11, row 19 report
1119.75	ε -> liq + ε′	ε′: Cu 0.5	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 26 report
1119.15	γ′ + ε -> ε′	ε′: Cu 0.5	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 20 report
1119.15	ε -> liq + ε′	ε′: Cu 0.5	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 24 report
1115.45	ε -> liq + ε′	ε: Cu 0.582; liq: Cu 0.515; ε′: Cu 0.597	model	[1] Kroupa 2021	Table 5, p. 11, row 23 report
1109.3	eutectoid: bcc-A2 -> AlCu-ε + AlCu-γ(D83)	bcc-A2: Cu 0.602; AlCu-ε: Cu 0.58; AlCu-γ(D83): Cu 0.635	model	[3] (ed.) 1998	Table I, p. 48, row 11 report
1073.15	γ -> γ′ + β (ord.)		experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 29 report
1063.85	γ -> γ′ + β (ord.)		model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 30 report
1054.2	eutectoid: AlCu-γ(H) -> AlCu-γ(D83) + bcc-A2	AlCu-γ(H): Cu 0.688; AlCu-γ(D83): Cu 0.686; bcc-A2: Cu 0.732	model	[3] (ed.) 1998	Table I, p. 48, row 9 report
1052.75	γ -> γ′ + β (ord.)		experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 28 report
1050.75	γ -> γ′ + β (ord.)	γ: Cu 0.69; γ′: Cu 0.676; β: Cu 0.729	model	[1] Kroupa 2021	Table 5, p. 11, row 27 report
959.7	peritectoid: AlCu-ε + AlCu-γ(D83) -> AlCu-δ	AlCu-ε: Cu 0.572; AlCu-γ(D83): Cu 0.628; AlCu-δ: Cu 0.6	model	[3] (ed.) 1998	Table I, p. 48, row 12 report
957.75	γ′ + ε′ -> δ	ε′: Cu 0.5; δ: Cu 0.615385	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 34 report
957.15	γ′ + ε′ -> δ	ε′: Cu 0.5; δ: Cu 0.615385	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 33 report
955.25	γ′ + ε′ -> δ	ε′: Cu 0.5; δ: Cu 0.615385	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 32 report
955.05	γ′ + ε′ -> δ	γ′: Cu 0.621; ε′: Cu 0.584; δ: Cu 0.604	model	[1] Kroupa 2021	Table 5, p. 11, row 31 report
898.15	liq + ε′ -> η	ε′: Cu 0.5; η: Cu 0.5	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 37 report
898.15	liq + ε′ -> η	ε′: Cu 0.5; η: Cu 0.5	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 38 report
898	peritectic: Liquid + AlCu-ε -> AlCu-η	Liquid: Cu 0.345; AlCu-ε: Cu 0.541; AlCu-η: Cu 0.51	model	[3] (ed.) 1998	Table I, p. 48, row 3 report
897.65	liq + ε′ -> η	liq: Cu 0.362; ε′: Cu 0.549; η: Cu 0.516	model	[1] Kroupa 2021	Table 5, p. 11, row 35 report
897.65	liq + ε′ -> η	ε′: Cu 0.5; η: Cu 0.5	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 36 report
871.85	ε′ + η -> η′	ε′: Cu 0.548; η: Cu 0.516; η′: Cu 0.529	model	[1] Kroupa 2021	Table 5, p. 11, row 39 report
871.05	ε′ + η -> η′	ε′: Cu 0.5; η: Cu 0.5; η′: Cu 0.5	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 42 report
870.15	ε′ + η -> η′	ε′: Cu 0.5; η: Cu 0.5; η′: Cu 0.5	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 40 report
870.15	ε′ + η -> η′	ε′: Cu 0.5; η: Cu 0.5; η′: Cu 0.5	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 41 report
869	peritectic: Liquid + AlCu-η -> AlCu-θ	Liquid: Cu 0.319; AlCu-η: Cu 0.506; AlCu-θ: Cu 0.329	model	[3] (ed.) 1998	Table I, p. 48, row 2 report
866.45	liq + η -> θ	η: Cu 0.5; θ: Cu 0.333333	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 46 report
866.15	liq + η -> θ	liq: Cu 0.335; η: Cu 0.513; θ: Cu 0.337	model	[1] Kroupa 2021	Table 5, p. 11, row 43 report
864.15	liq + η -> θ	η: Cu 0.5; θ: Cu 0.333333	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 45 report
862.15	liq + η -> θ	η: Cu 0.5; θ: Cu 0.333333	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 44 report
861	congruent transformation: AlCu-ζ -> AlCu-ε	AlCu-ζ: Cu 0.55	model	[3] (ed.) 1998	Table I, p. 48, row 15 report
855.8	eutectoid: AlCu-ε -> AlCu-ζ + AlCu-δ	AlCu-ε: Cu 0.555; AlCu-ζ: Cu 0.55; AlCu-δ: Cu 0.6	model	[3] (ed.) 1998	Table I, p. 48, row 13 report
853.55	ε′ -> ζ + η′	ε′: Cu 0.5; ζ: Cu 0.561; η′: Cu 0.5	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 62 report
852.4	eutectoid: AlCu-ε -> AlCu-η + AlCu-ζ	AlCu-ε: Cu 0.543; AlCu-η: Cu 0.511; AlCu-ζ: Cu 0.55	model	[3] (ed.) 1998	Table I, p. 48, row 14 report
851.15	ε′ -> δ + ζ	ε′: Cu 0.5; δ: Cu 0.615385; ζ: Cu 0.561	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 51 report
851.15	ε′ -> δ + ζ	ε′: Cu 0.566; δ: Cu 0.596; ζ: Cu 0.561	model	[1] Kroupa 2021	Table 5, p. 11, row 49 report
848.15	ε′ -> δ + ζ	ε′: Cu 0.5; δ: Cu 0.615385; ζ: Cu 0.561	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 50 report
847.15	η -> η′ + θ	η: Cu 0.5; η′: Cu 0.5; θ: Cu 0.333333	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 55 report
847.05	η -> η′ + θ	η: Cu 0.5; η′: Cu 0.5; θ: Cu 0.333333	experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 54 report
846.75	η -> η′ + θ	η: Cu 0.512; η′: Cu 0.521; θ: Cu 0.337	model	[1] Kroupa 2021	Table 5, p. 11, row 53 report
841.15	ε′ -> ζ + η′	ε′: Cu 0.551; ζ: Cu 0.561; η′: Cu 0.532	model	[1] Kroupa 2021	Table 5, p. 11, row 61 report
840.65	β -> (Cu) + γ′		model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 60 report
840.55	β -> (Cu) + γ′	β: Cu 0.774; (Cu): Cu 0.798; γ′: Cu 0.69	model	[1] Kroupa 2021	Table 5, p. 11, row 57 report
840.15	β -> (Cu) + γ′		experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 59 report
840.15	Fcc-bcc-γ	Fcc: Cu 0.803; bcc: Cu 0.761; γ: Cu 0.69	experimental	[2] Miettinen 2002 cites Murray 1985 doi	Table III, p. 4, row 7 report
840.15	Fcc-bcc-γ	Fcc: Cu 0.803; bcc: Cu 0.762; γ: Cu 0.701	model	[2] Miettinen 2002	Table III, p. 4, row 9 report
839.85	β -> (Cu) + γ′		experimental	[1] Kroupa 2021 cites ref. 1	Table 5, p. 11, row 58 report
838.15	Fcc-bcc-γ	Fcc: Cu 0.795; bcc: Cu 0.771; γ: Cu 0.691	model	[2] Miettinen 2002 cites Ansara 1998	Table III, p. 4, row 8 report
837.9	eutectoid: bcc-A2 -> AlCu-γ(D83) + fcc-A1	bcc-A2: Cu 0.771; AlCu-γ(D83): Cu 0.691; fcc-A1: Cu 0.795	model	[3] (ed.) 1998	Table I, p. 48, row 8 report
830.85	ε′ -> δ + ζ	ε′: Cu 0.5; δ: Cu 0.615385; ζ: Cu 0.561	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 52 report
820.7	eutectic: Liquid -> fcc-A1 + AlCu-θ	Liquid: Cu 0.175; fcc-A1: Cu 0.025; AlCu-θ: Cu 0.318	model	[3] (ed.) 1998	Table I, p. 48, row 1 report

Other properties

Phase transition (5)

Phase transition, Al–Cu system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	854.45 K	854.45	congruent transformation: ζ -> ε′(congruent) ζ: Cu 0.561; ε′: Cu 0.5	model	[1] Kroupa 2021	Table 5, p. 11, row 47 report
Phase transition	874.75 K	874.75	congruent transformation: ζ -> ε′(congruent) ε′: Cu 0.5	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 48 report
Phase transition	1316.15 K	1316.15	congruent melting: liq. -> β (congruent)	model	[1] Kroupa 2021 cites Liang 2015 doi	Table 5, p. 11, row 3 report
Phase transition	1325.15 K	1325.15	congruent melting: liq. -> β (congruent)	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 5, p. 11, row 2 report
Phase transition	1329.45 K	1329.45	congruent melting: liq. -> β (congruent) liq.: Cu 0.755; β: Cu 0.755	model	[1] Kroupa 2021	Table 5, p. 11, row 1 report

Phase equilibrium (22)

Phase equilibrium, Al–Cu system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition		θ + h θ: Al 0.664, Cu 0.336; h: Al 0.664, Cu 0.336	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 3 report
Phase composition	633.15 (<)	α′ α′: Al 0.21, Cu 0.79	experimental	[1] Kroupa 2021 cites Kuwano 1977 doi	Table 2, p. 5, row 28 report
Phase composition	702.65	ζ′ + f 0 ζ′: Al 0.426, Cu 0.574; f 0: Al 0.426, Cu 0.574	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 13 report
Phase composition	758.15	ζ ζ: Al 0.433, Cu 0.567	unspecified	[1] Kroupa 2021 cites ref. 3	Table 2, p. 5, row 11 report
Phase composition	760.65	ζ ζ: Al 0.42, Cu 0.58	experimental	[1] Kroupa 2021 cites Gulay 2003 doi	Table 2, p. 5, row 10 report
Phase composition	762.65	ζ′ ζ′: Al 0.423, Cu 0.577	experimental	[1] Kroupa 2021 cites Gulay 2004 doi	Table 2, p. 5, row 14 report
Phase composition	825.15	ζ ζ: Al 0.435, Cu 0.565	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 9 report
Phase composition	833.15	ζ′ ζ′: Al 0.437, Cu 0.563	unspecified	[1] Kroupa 2021 cites ref. 3	Table 2, p. 5, row 15 report
Phase composition	847.65 (<)	η′ η′: Al 0.486, Cu 0.514	experimental	[1] Kroupa 2021 cites ref. 1	Table 2, p. 5, row 8 report
Phase composition	854.15 (<)	η′ + g 0 η′: Al 0.452, Cu 0.548; g 0: Al 0.452, Cu 0.548	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 7 report
Phase composition	863.65 (<)	θ + h θ: Al 0.664, Cu 0.336; h: Al 0.664, Cu 0.336	experimental	[1] Kroupa 2021 cites ref. 1	Table 2, p. 5, row 4 report
Phase composition	864.15 (<)	θ + h θ: Al 0.674, Cu 0.326; h: Al 0.674, Cu 0.326	experimental	[1] Kroupa 2021 cites Goedecke 1996	Table 2, p. 5, row 2 report
Phase composition	872.65	η + g η: Al 0.471, Cu 0.529; g: Al 0.471, Cu 0.529	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 5 report
Phase composition	933.65 (<)	(Al) (Al): Al 0.9752, Cu 0.0248	unspecified	[1] Kroupa 2021 cites ref. 3	Table 2, p. 5, row 1 report
Phase composition	960.15 (<)	δ + d δ: Al 0.36, Cu 0.64; d: Al 0.36, Cu 0.64	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 21 report
Phase composition	985.65	ε′ ε′: Al 0.375, Cu 0.625	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 19 report
Phase composition	1082.65	β β: Al 0.18, Cu 0.82	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 27 report
Phase composition	1146.65 (<)	γ′ γ′: Al 0.304, Cu 0.696	experimental	[1] Kroupa 2021 cites ref. 1	Table 2, p. 5, row 26 report
Phase composition	1147.15 (<)	γ′ + c 0 γ′: Al 0.3, Cu 0.7; c 0: Al 0.3, Cu 0.7	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 25 report
Phase composition	1169.65	γ γ: Al 0.31, Cu 0.69	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 23 report
Phase composition	1176.65	ε ε: Al 0.355, Cu 0.645	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 17 report
Phase composition	1356.15 (<)	(Cu) (Cu): Al 0, Cu 1	experimental	[1] Kroupa 2021 cites Ponweiser 2011 doi	Table 2, p. 5, row 30 report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

Aleš Kroupa, Ondřej Zobač, Klaus W. Richter, The thermodynamic reassessment of the binary Al–Cu system, J Mater Sci 56, 3430-3443 (2021). doi:10.1007/s10853-020-05423-7
J. Miettinen, Thermodynamic description of the Cu-Al-Sn system in the copper-rich corner, Metall Mater Trans A 33, 1639-1648 (2002). doi:10.1007/s11661-002-0173-7
I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23736065

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

@misc{orchid_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}