【作者】 王立强； 位倩倩； 吕维洁； 覃继宁； 张帆； 张荻；

【Author】 WANG Li-qiang,WEI Qian-qian,LU Wei-jie,QIN Ji-ning,ZHANG Fan,ZHANG Di (State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China)

【机构】 上海交通大学金属基复合材料国家重点实验室；

【摘要】 利用真空自耗熔炼方法和热加工技术制备Ti-35Nb-2Ta-3Zrβ钛合金,采用单向轧制和交叉轧制对合金进行冷变形。通过对轧制态试样的微观组织分析,研究不同轧制方式下的马氏体转变特征。结果表明:单向轧制和交叉轧制过程中产生应变诱发马氏体相,随着变形量的增大,马氏体形貌由针状逐渐转变为粗大的变体;交叉轧制更有利于马氏体相的转变,当冷变形量为40%时,马氏体的转变量达到79.63%,并在随后的冷变形过程中,马氏体转变量基本保持不变。更多还原

【Abstract】 Ti-35Nb-2Ta-3Zrβtitanium alloy was fabricated by vacuum consumable arc melting furnace followed by hot pressing.Direct-rolling and cross-rolling were carried out.Microstructure was investigated to study the characterization of martensite phase transformation during direct-rolling and cross-rolling.The results show that stress-induced martensite phase transformation takes place.With the increase of the deformation,the microstructure of martensite phase changes from acicular to variant crossed and cross-hatched.Cross-rolling is propitious to martensite phase transformation.When the deformation reduction ratio is 40%,the amount of martensite phase arrives at 79.63%,which keeps nearly the same with the increase of deformation reduction ratio.更多还原