Effect of HIP Treatment on Fatigue Crack Growth Behavior of Ti-6Al-4V Alloy Fabricated by Electron Beam Melting

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2017,（12）
• 页码范围: 1163-1168
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s40195-017-0665-5

摘要

The effect of hot isostatic pressing treatment on the fatigue crack growth behavior of Ti-6Al-4V alloy fabricated by electron beam melting was investigated.The results indicate that the fatigue crack growth rate of the HIPed samples is higher than that of the as-fabricated one under certain stress intensity factor (△K ＜ 18 MPa m1/2).With further increase in △K,the fatigue crack growth rates of the studied two samples become similar.The variation of α lamella thickness and the pore defects distribution have an effect on the fatigue crack growth rates in the studied samples,and the latter plays the dominant role.