典型文献
Phase Selection and Microhardness of Directionally Solidified AlCoCrFeNi2.1 Eutectic High-Entropy Alloy
文献摘要：
In the present work,the solidification behaviors and microhardness of directionally solidified AlCoCrFeNi2.1 eutectic high-entropy alloy(EHEA)obtained at different growth velocities are investigated.The microstructure of the as-cast AlCoCrFeNi2.1 EHEA is composed of bulky dendrites(NiAl phase)and lamellar eutectic structures,indicating that the actual composition of the alloy slightly deviates from the eutectic point.However,it is interesting to observe that the full lamellar structure of this alloy is obtained through directional solidification.In order to explain this phenomenon,the maximum interface temperature criterion and the interface response function(IRF)theory are applied to calculate the velocity range of the transition from the primary phase to the eutectic,which is 1.2-2×104 μm/s.Furthermore,microhardness is one of the important parameters to measure the mechanical properties of materials.Therefore,the microhardness test is performed,and the test result indicates that the microhardness(HV)increased with increasing growth velocity(V)or decreased with increasing lamellar spacing(λ).The dependences of λ and HV on V are determined by using a linear regression analysis.The relationships between the λ,V and HV are given as:λ=11.62V-0.48,HV=305.5V 0.02and HV=328.1λ-0.04,respectively.The microhardness of the AlCoCrFeNi2.1 EHEA increases from 312.38 HV to 329.54 HV with the increase in growth velocity(5-200 μm/s).Thus,directional solidification is an effective method to improve the mechanical properties of alloys.
文献关键词：
中图分类号：
作者姓名：
Peng Peng;Shengyuan Li;Weiqi Chen;Yuanli Xu;Xudong Zhang;Zhikun Ma;Jiatai Wang
作者机构：
School of Materials Science and Energy,Lanzhou University,Lanzhou 730000,China;Gansu Institute of Metrology,Lanzhou 730071,China;School of Physics and Electronic Information Engineering,Qinghai Normal University,Xining 810000,China
文献出处：
引用格式：
[1]Peng Peng;Shengyuan Li;Weiqi Chen;Yuanli Xu;Xudong Zhang;Zhikun Ma;Jiatai Wang-.Phase Selection and Microhardness of Directionally Solidified AlCoCrFeNi2.1 Eutectic High-Entropy Alloy)[J].金属学报（英文版）,2022(08):1281-1290
A类：
Solidified,62V,02and
B类：
Phase,Selection,Microhardness,Directionally,AlCoCrFeNi2,Eutectic,High,Entropy,Alloy,In,present,work,solidification,behaviors,microhardness,directionally,solidified,eutectic,high,entropy,EHEA,obtained,different,growth,velocities,are,investigated,microstructure,cast,composed,bulky,dendrites,NiAl,phase,lamellar,structures,indicating,that,actual,composition,slightly,deviates,from,point,However,interesting,observe,full,this,through,order,explain,phenomenon,maximum,interface,temperature,criterion,response,function,IRF,theory,applied,calculate,velocity,range,transition,primary,which,Furthermore,one,important,parameters,measure,mechanical,properties,materials,Therefore,test,performed,result,indicates,HV,increased,increasing,decreased,spacing,dependences,determined,by,using,linear,regression,analysis,relationships,between,given,5V,respectively,increases,Thus,effective,method,improve,alloys
AB值：
0.525757
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