مورد إلكتروني
Thermodynamic modelling to predict phase stability in BCC + B2 Al–Ti–Co–Ni–Fe–Cr high entropy alloys
| العنوان: | Thermodynamic modelling to predict phase stability in BCC + B2 Al–Ti–Co–Ni–Fe–Cr high entropy alloys |
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| بيانات النشر: | Jönköping University, JTH, Material och tillverkning School of Materials Science and Engineering, UNSW Sydney, 2052, NSW, Australia Department of Engineering, Harvey Mudd College, 301 Platt Blvd, Claremont, 91711, CA, United States Department of Engineering, Harvey Mudd College, 301 Platt Blvd, Claremont, 91711, CA, United States School of Materials Science and Engineering, UNSW Sydney, 2052, NSW, Australia School of Materials Science and Engineering, UNSW Sydney, 2052, NSW, Australia 2022 |
| تفاصيل مُضافة: | Conway, Patrick L. J. Golay, D. Bassman, L. Ferry, M. Laws, K. J. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | This paper examines the potential of thermodynamic modelling as a simple and inexpensive means for assessing phase stability in a series of non-equiatomic high entropy alloys and compares with CALPHAD calculations to demonstrate an appropriate level of simplifying assumptions. The modelling was motivated by alloys from the Al–Ti–Co–Ni–Fe–Cr system, which were produced by iteratively following the natural compositional segregation of the two-phase BCC + B2 microstructure present in a Al2TiCoNiFeCr alloy after casting and heat treatment. This produced a range of multicomponent B2-type alloys with different volume fractions of a BCC secondary phase. The solubility limits and traditional empirical thermodynamic driving forces for phase stability were investigated to explain the formation of the two phases. Limitations of prior semi-empirical models are highlighted, with advancements demonstrated by accounting for contributions from the effect of ordering on configurational entropy, the difference in enthalpy from intermetallic compounds, and thermal influences on both entropy and enthalpy. The new models are compared against the current leading thermodynamic modelling approach, CALPHAD, with excellent correlation. This work outlines a methodology to predict and design phase constitution in future high-performance BCC + B2 alloys and, more generally, it demonstrates the value of models with temperature-dependent thermodynamic quantities for exploring new, complex compositional regions. |
| مصطلحات الفهرس: | B2 crystal structure, BCC crystal Structure, CALPHAD, High entropy alloys, Thermodynamic stability, Aluminum alloys, Chromium alloys, Cobalt alloys, Enthalpy, Entropy, High-entropy alloys, Iterative methods, Phase stability, Titanium alloys, B2 crystal, Crystals structures, Simple++, Thermodynamic modelling, Two phase, Crystal structure, Materials Engineering, Materialteknik, Article in journal, info:eu-repo/semantics/article, text |
| DOI: | 10.1016.j.matchemphys.2021.125395 |
| URL: | Materials Chemistry and Physics, 0254-0584, 2022, 276 |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/restrictedAccess |
| ملاحظة: | English |
| أرقام أخرى: | UPE oai:DiVA.org:hj-55084 doi:10.1016/j.matchemphys.2021.125395 ISI:000720131900002 Scopus 2-s2.0-85118492252 Local HOA;intsam;777145 1293956244 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1293956244 |
| قاعدة البيانات: | OAIster |
| DOI: | 10.1016.j.matchemphys.2021.125395 |
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