TC21合金在不同温度下进行连续多步置氢处理时的显微组织及室温力学性能  

Microstructure and room-temperature mechanical property of TC21 alloy treated by continuous multistep hydrogenation at different temperatures

作　　者：袁宝国[1] 钱德国 张小雪[2] 陈强[3] 汤爱闯 Bao-guo YUAN;De-guo QIAN;Xiao-xue ZHANG;Qiang CHEN;Ai-chuang TANG(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;School of Mechanical Engineering,Anhui Sanlian University,Hefei 230601,China;Southwest Technology and Engineering Research Institute,Chongqing 400039,China)

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]安徽三联学院机械工程学院,合肥230601 [3]西南技术工程研究所,重庆400039

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第5期1520-1532,共13页中国有色金属学报（英文版）

基　　金：National Natural Science Foundation of China(Nos.52275328,51875157);Cultivating Program for Excellent Talent in University,China(No.GXYQ2021238)。

摘　　要：利用OM、XRD、TEM以及压缩试验等方法研究TC21钛合金经不同温度连续多步置氢处理后的显微组织及室温力学性能。结果表明:当氢处理温度超过1073 K时,α相的尺寸明显降低,β相成为主要相。随着氢处理温度的升高,δ氢化物的含量呈先增加后逐渐降低的趋势。当氢处理温度超过1073 K时,TC21钛合金在室温压缩变形过程中出现应变软化现象,且该现象随氢处理温度的升高而越来越显著。随着氢处理温度的升高,TC21钛合金的极限变形率呈先降低后增加的趋势。当氢处理温度为1123 K时,TC21钛合金的极限变形率比原始合金增加67.51%。Microstructure and room-temperature mechanical property of TC21 titanium alloy treated by continuous multistep hydrogenation at different temperatures were studied by OM,XRD,TEM and compressive test.Results showed that the size ofαphase decreased obviously andβphase became the main phase when the hydrogenation temperature exceeded 1073 K.The content ofδhydride increased first and then decreased gradually with the increase of hydrogenation temperature.The strain softening phenomenon appeared during the compression process of TC21 titanium alloy when the hydrogenation temperature exceeded 1073 K and became obvious with the increase of hydrogenation temperature.The ultimate compression of TC21 titanium alloy decreased first and then increased with the increase of hydrogenation temperature,and increased by 67.51%compared with that of the as-received TC21 titanium alloy when the hydrogenation temperature was 1123 K.

关 键 词：TC21合金 连续多步置氢处理 室温力学性能 压力-组成等温线 

分 类 号：TG146.23[一般工业技术—材料科学与工程]