Influence of Heat-treatment on Microstructure and Mechanical Properties of Ti-6Al-4V ELI Plate
Ti-6A1-4V ELI (TC4ELI) alloy is a type of medium strength titanium alloy. By decreasing interstitial elements on the base of conventional TC4 alloy, TC4ELI alloy exhibites remarkable damage tolerance properties. This present study primarily focuses on microstructure and mechanical properties of TC4 ELI plate after three kinds of heat treatment: annealing treatment, below and above beta transus temperature ( Tβ) solution following aging treatment. The results show that TC4ELI plates after annealing treatment and below Tβsolution treatment exhibite almost the same microstructure and mechanical properties, including tensile properties, fatigue crack growth rates (da/dN). Above Tβ solution and aging treatment, it leads to Widmanstaten structure with prior (3 grain, which exhibites high fatigue crack resistance and fracture toughness. Additional crack propagating path observed by SEM has been employed to disclose the microstructural influence in Widmanstaten structure.
Ti-6Al-4V ELI microstructure mechanical property fracture toughness fatigue crack growth rate(da/dN)
WANG Xin LEI Jiafeng MA Yingjie LI Xiaoyani WANG Jian WANG Hongwu
Baoji Titanium Industry Co. ,Ltd. Baoji 721014 ,China Institute of Metal Research , The Chinese Academy of Science, Shenyang 110016, China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1209-1211
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）