Microstructure Dependent Fatigue Cracking Resistance of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si Alloy

被引：0
|
作者：
Z.M.Song 1)
机构：
来源：
Journal of Materials Science & Technology | 2012年 / 28卷 / 07期
基金：
中国国家自然科学基金; 中央高校基本科研业务费专项资金资助;
关键词：
Ti alloy; Fatigue crack initiation; Crack propagation; Microstructure;
D O I：
暂无
中图分类号：
TG146.23 [];
学科分类号：
摘要：
Fatigue cracking behavior from a notch was investigated at room temperature for Ti-6.5Al-3.5Mo-1.5Zr-0.3Si(TC11) alloys with four different microstructures obtained at different cooling rates from the β transus temperature.It was found that the alloy with lamellar structures consisting of α/β lamellae or acicular α’ martensite laths had a higher fatigue crack initiation threshold from the notch,while the bimodal structure with coarse α grain had a lower fatigue cracking resistance.The alloy with α/β lamellar structure showed a higher fatigue crack growth resistance.The length scales of the microstructures were characterized to correlate with fatigue cracking behavior.Fatigue cracking mechanism related to microstructures was discussed.
引用
收藏
页码：614 / 621
页数：8
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