轧制温度对FeCoCrNiMn高熵合金组织及力学性能的影响  

Effect of rolling temperature on microstructure and mechanical properties of FeCoCrNiMn high-entropy alloy

作　　者：钟达智 彭彬 焦海涛 吴文胜 ZHONG Da-zhi;PENG Bin;JIAO Hai-tao;WU Wen-sheng(School of Material Science and Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学材料科学与工程学院,江西南昌330013

出　　处：《塑性工程学报》2025年第4期64-73,共10页Journal of Plasticity Engineering

基　　金：江西省自然科学基金资助项目(20232BAB204053)。

摘　　要：分别在-78、25和100℃下对FeCoCrNiMn高熵合金进行轧制,研究了轧制温度对该合金组织、织构演化及力学性能的影响。结果表明,随着轧制温度升高,变形微观组织中剪切带密度与位错密度下降,剪切带与变形孪晶主要分布于{111}取向的变形晶粒内。-78℃轧制试样以强的Goss织构和Brass织构为主,100℃轧制试样则存在强的Cu织构和Brass织构,轧制温度的升高会促进铜型织构形成。退火后,随轧制温度升高,再结晶晶粒尺寸逐渐增大,组织均匀性提升。相比于变形织构,再结晶织构强度显著降低,主要变形织构得以保留。退火板的极限抗拉强度随轧制温度的升高而降低,伸长率随轧制温度的升高而上升。The FeCoCrNiMn high-entropy alloy was rolled at-78,25 and 100℃,respectively.The effects of rolling temperature on the microstructure,texture evolution and mechanical properties of the alloy were studied.The results show that with the increase of rolling temperature,the shear band density and dislocation density in the deformed microstructure decrease,and the shear band and deformation twins are mainly distributed in the{111}oriented deformed grains.The samples rolled at-78℃are dominated by strong Goss texture and Brass texture,while strong Cu texture and Brass texture exist in the samples rolled at 100℃.The Copper-type texture is formed with the increase of rolling temperature.After annealing,with the increase of rolling temperature,the recrystallized grain size gradually increases and the microstructure uniformity increases.Compared with the deformation texture,the strength of the recrystallization texture is significantly reduced,and the main deformation texture is retained.The ultimate tensile strength of the annealed sheet decreases with the increase of rolling temperature,and the elongation increases with the increase of rolling temperature.

关 键 词：高熵合金 轧制温度 组织 织构 力学性能 

分 类 号：TG335[金属学及工艺—金属压力加工]