连续多步置氢处理步数对TC21合金显微组织和室温压缩性能的影响  

Effect of continuous multistep hydrogenation treatment step on microstructures and room-temperature compressive properties of TC21 alloy

作　　者：袁宝国[1] 汤爱闯 钱德国 陈强[2] Bao-guo YUAN;Ai-chuang TANG;De-guo QIAN;Qiang CHEN(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,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]西南技术工程研究所,重庆400039

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第8期2365-2378,共14页中国有色金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51875157)。

摘　　要：采用OM、XRD和TEM方法研究连续多步置氢处理步数对TC21合金显微组织的影响。通过室温压缩实验研究连续多步置氢TC21合金在不同压缩速度下的压缩性能。结果表明:随着连续多步置氢处理步数的增加,α相的含量减少,β相和δ氢化物的含量增多,仅置氢1步时TC21合金中出现α'马氏体。连续多步置氢TC21合金的极限变形率在不同压缩速度下的变化规律相同,即随着连续多步置氢处理步数的增加,极限变形率先减小再增大最后又减小。连续多步置氢处理后,TC21合金的极限变形率比原始TC21合金最大增幅达到93.96%。分析了连续多步置氢TC21合金压缩性能变化的原因。The effect of continuous multistep hydrogenation treatment(CMHT)step on the microstructure of TC21 alloy was investigated by OM,XRD and TEM.Compressive properties of CMHT-processed TC21 alloys under diverse compressive velocities were also studied through room-temperature compression experiments.Results showed that the amount of α phase decreased and the amount of β phase and δ hydride increased as the CMHT step increased.α'martensite occurred only in TC21 alloy processed by one step CMHT.The deformation limit of CMHT-processed TC21 alloys showed the same change law under diverse compressive velocities,which decreased first,then increased,and finally decreased again as the CMHT step increased.The maximum increase of the deformation limit of TC21 alloy after CMHT reached 93.96%as compared to the original TC21 alloy.Reasons for the change of compressive properties of TC21 alloy processed by CMHT were analyzed.

关 键 词：TC21合金 连续多步置氢处理 显微组织 室温压缩性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]