Effects of heat treatments on microstructures and mechanical properties of beta-c alloy
Effects of heat treatments on microstructures and mechanical properties of Beta-C alloy were investigated. Microstructures were observed via optical microscopy, scanning electron microscopy and transmission electron microscopy. X-ray diffraction was used for phase identification. The results show that the alloy has high tensile strength and excellent plasticities when it is solution treated between 650 and 920 ℃. The alloy has a wide solution treatment temperature window ranging from 745 to 815 ℃ with ultimate tensile strength of about 924 MPa and elongation of about 22％. The β grain size grows dramatically with solution treatment temperature exceeding 850℃. After aged at 500 ℃ for 10 hours and air cooled, all specimens get ultimate tensile strength beyond 1320 MPa. Plasticities decrease above solution treatment temperature of 850 ℃. Solution plus aging treated Beta-C alloy consists of a and β phase and precipitated a phase has the Burgers orientation relationship with β matrix. The a phase in the specimen solution treated at 650 ℃ and aged at 500 ℃ presents two types of morphology.
Beta-C alloy heat treatment microstructure mechanical property
Xin Xu Limin Dong Zhiqiang Zhang Hongbo Ba Shaoxuan Guan Rui Yang
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
国际会议
北京
英文
142-146
2012-10-23（万方平台首次上网日期，不代表论文的发表时间）