Predicting temperature-dependent ultimate strengths of body-centered-cubic(BCC)high-entropy alloys  

作　　者：B.Steingrimsson X.Fan X.Yang M.C.Gao Y.Zhang P.K.Liaw 

机构地区：[1]Imagars LLC,2062 Thorncroft Drive Suite 1214,Hillsboro,OR 97124,USA [2]Department of Materials Science and Engineering,The University of Tennessee,Knoxville,TN 37996,USA [3]University of Chinese Academy of Sciences,Center of Materials Science and Optoelectronics Engineering,Beijing 100049,China [4]National Energy Technology Laboratory,1450 Queen Ave.SW,Albany,OR 97321,USA [5]Beijing Advanced Innovation Center of Materials Genome Engineering,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China [6]Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming,Qinghai University,Xining 810016,China [7]Shunde Graduate School,University of Science and Technology Beijing,Foshan 528399,China

出　　处：《npj Computational Materials》2021年第1期1384-1393,共10页计算材料学（英文）

基　　金：X.F.and P.K.L.very much appreciate the support of the U.S.Army Research Office Project(W911NF-13-1-0438 and W911NF-19-2-0049)with the program managers;Drs M.P.Bakas,S.N.Mathaudhu,and D.M.Stepp,as well as the support from the Bunch Fellowship.XF and PKL also would like to acknowledge funding from the State of Tennessee and Tennessee Higher Education Commission(THEC)through their support of the Center for Materials Processing(CMP).P.K.L.,furthermore,thanks the support from the National Science Foundation(DMR-1611180 and 1809640)with the program directors;Drs J.Yang,G.Shiflet,and D.Farkas.B.S.very much appreciates the support from the National Science Foundation(IIP-1447395 and IIP-1632408)with the program directors;Dr G.Larsen and R.Mehta,from the U.S.Air Force(FA864921P0754),with J.Evans as the program manager,and from the U.S.Navy(N6833521C0420),with Drs D.Shifler and J.Wolk as the program managers.M.C.G.acknowledges the support of the US Department of Energy’s Fossil Energy Crosscutting Technology Research Program.The authors also want to thank Dr.G.Tewksbury for bringing to their attention suspicious recordings of the US from the literature,which have prompted the data curation effort.

摘　　要：This paper presents a bilinear log model,for predicting temperature-dependent ultimate strength of high-entropy alloys(HEAs)based on 21 HEA compositions.We consider the break temperature,Tbreak,introduced in the model,an important parameter for design of materials with attractive high-temperature properties,one warranting inclusion in alloy specifications.For reliable operation,the operating temperature of alloys may need to stay below Tbreak.We introduce a technique of global optimization,one enabling concurrent optimization of model parameters over low-temperature and high-temperature regimes.Furthermore,we suggest a general framework for joint optimization of alloy properties,capable of accounting for physics-based dependencies,and show how a special case can be formulated to address the identification of HEAs offering attractive ultimate strength.We advocate for the selection of an optimization technique suitable for the problem at hand and the data available,and for properly accounting for the underlying sources of variations.

关 键 词：ALLOYS STRENGTH alloy 

分 类 号：TG13[一般工业技术—材料科学与工程]