Fe–W system

4 accepted literature values from 2 paper(s) (experimental 2, unspecified 2); 3 calculated phase diagram(s). 4 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 (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	2
unspecified	2

Accepted values by property group
Property group	Values
invariant reaction	1
phase transition	1
crystal structure	2

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
FeW-15Jac-phonon.tdb	A. Jacob, C. Schmetterer, L. Singheiser, A. Gray-Weale, B. Hallstedt, A. Watson, Calphad, 50, 92-104(2015). doi:10.1016/j.calphad.2015.04.010	`3c044c4de34afca7d493b118e17ed918697675af0bcccc6296e09cad248ec9fa`	viewer · TDB · JSON
FeW-15Jac-static.tdb	A. Jacob, C. Schmetterer, L. Singheiser, A. Gray-Weale, B. Hallstedt, A. Watson, Calphad, 50, 92-104(2015). doi:10.1016/j.calphad.2015.04.010	`40556b11f6faf2f1031039825b1563e4cd65bbf686489fb783a65f51f891ec92`	viewer · TDB · JSON
FeW-87Gus-LB.tdb	P. Gustafson, Metall. Trans. A, 18A, 175-88 (1987). doi:10.1007/BF02825699	`0f42cbd0e7a82e6e7f3faf7a4de53382dcfddd5e797891f5ad7784c9c2beae65`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FeW-15Jac-phonon.tdb	1910.63	LIQUID (x(W) 0.16907) + MU_D85 (x(W) 0.40965) + BCC_A2 (x(W) 0.9585)
FeW-15Jac-phonon.tdb	1819.91	LIQUID (x(W) 0.10845) + BCC_A2 (x(W) 0.14363) + MU_D85 (x(W) 0.40032)
FeW-15Jac-phonon.tdb	1332.91	BCC_A2 (x(W) 0.03414) + C14_LAVES (x(W) 0.32844) + MU_D85 (x(W) 0.41053)
FeW-15Jac-static.tdb	1910.74	LIQUID (x(W) 0.16368) + MU_D85 (x(W) 0.42803) + BCC_A2 (x(W) 0.95972)
FeW-15Jac-static.tdb	1821.16	LIQUID (x(W) 0.11066) + BCC_A2 (x(W) 0.14966) + MU_D85 (x(W) 0.41758)
FeW-15Jac-static.tdb	1332.97	BCC_A2 (x(W) 0.03293) + C14_LAVES (x(W) 0.32861) + MU_D85 (x(W) 0.4055)
FeW-87Gus-LB.tdb	1914.37	LIQUID (x(W) 0.15827) + MU_D85 (x(W) 0.40537) + BCC_A2 (x(W) 0.96215)
FeW-87Gus-LB.tdb	1819.89	LIQUID (x(W) 0.11633) + BCC_A2 (x(W) 0.13831) + MU_D85 (x(W) 0.39476)
FeW-87Gus-LB.tdb	1335.45	BCC_A2 (x(W) 0.04106) + C14_LAVES (x(W) 0.33333) + MU_D85 (x(W) 0.39425)
FeW-87Gus-LB.tdb	383.76	BCC_A2 (x(W) 1.000e-5) + C14_LAVES (x(W) 0.33333) + MU_D85 (x(W) 0.4611)
FeW-87Gus-LB.tdb	383.76	BCC_A2 (x(W) 1.000e-5) + C14_LAVES (x(W) 0.33333) + MU_D85 (x(W) 0.4611)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull FeW-15Jac-static · CALPHAD hull FeW-87Gus-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Fe–W system (1)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1463	eutectoid: /~-phase -> Fe-rich bcc + FeW		experimental	[1] Gustafson 1987	p. 1 report	In a complementary work Hofmann ~~employed DTA analysis on alloys containing the FeW phase and he found that it forms from the/z-phase and W-rich solid solution at 1488 K and that the /~-phase decomposes eutectoidally into an Fe-rich bcc phase and FeW at 1463 K.

Other properties

Phase transition (1)

Phase transition, Fe–W system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1488 K	1488	other: /z-phase + W-rich solid solution -> FeW	experimental	[1] Gustafson 1987	p. 1 report	In a complementary work Hofmann ~~employed DTA analysis on alloys containing the FeW phase and he found that it forms from the/z-phase and W-rich solid solution at 1488 K and that the /~-phase decomposes eutectoidally into an Fe-rich bcc phase and FeW at 1463 K.

Crystal structure (2)

Crystal structure, Fe–W system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Lattice a	4.766 Å	298.15	μ alloy: Fe 0.538462, W 0.461538	unspecified	[2] Ostrowska 2020	Table 3, p. 3, row 1 report
Lattice c	25.8731 Å	298.15	μ alloy: Fe 0.538462, W 0.461538	unspecified	[2] Ostrowska 2020	Table 3, p. 3, row 1 report

Sources

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

Per Gustafson, A thermodynamic evaluation of the C−Fe−W system, Metall Trans A 18, 175-188 (1987). doi:10.1007/bf02825699
Marlena Ostrowska, Gabriele Cacciamani, Thermodynamic modelling of the σ and μ phases in several ternary systems containing Co, Cr, Fe, Mo, Re and W, Journal of Alloys and Compounds 845, 156122 (2020). doi:10.1016/j.jallcom.2020.156122

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}
}