热循环温度对Ti-6Al-4V合金组织和力学性能的影响-中国有色金属学报.PDFVIP

20 1 2010 10 Vol.20 Special 1 The Chinese Journal of Nonferrous Metals Oct. 2010 1004-0609(2010)S1-s0127-05 Ti-6Al-4V 1 2 2 (1. 710016 2. , 710049) 500~1 000 20 Ti-6Al-4V(TC4) TC4 800 TC4 800 TC4 TC4 800 TC4 1 000 TC4 TG146.23 A Effect of thermal cycling temperature on microstructures and mechanical properties of Ti-6Al-4V alloy 1 2 2 ZHAO Yong-qing , LI Wen-peng , WEI Jian-feng (1. Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China; 2. School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China) Abstract: The changes of microstructures and mechanical properties of Ti-6Al-4V alloy after thermal cycling 20 times from 500 to 1 000 were researched. The results show that the strength of Ti-6Al-4V alloy firstly reduces and then increases with the increase of cycling temperature. If the cycling temperature is lower than 800 , its plasticity changes less with the temperature. While the temperature is higher than 800 , its plasticity decreases fast. The grain size grows fast with increasing temperature. While the temperature is over 800 , the lamellar microstructure forms, when the temperature reaches 1 000, the microstructure is almost lamellar one. Key words: Ti-6Al-4V alloy; thermal cycling; mechanical properties; microstructures [1] [2−10] 1 Ti-6Al-4V(TC4)