LASER SURFACE MELTING OF TI-6AL-4V ALLOY

被引：9
|
作者：
AKGUN, OV
INAL, OT
机构：
[1] Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining and Technology, Socorro, 87801, NM
来源：
JOURNAL OF MATERIALS SCIENCE | 1992年 / 27卷 / 05期
关键词：
D O I：
10.1007/BF01142062
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Surface hardening of Ti-6Al-4V alloy with laser surface melting (LSM) in a nitrogen atmosphere has been studied. In LSM, hardness increased almost three-fold in comparison to that of the substrate, the latter having a Vickers hardness of 350, by the formation of TiN in the range of 100-mu-m of melt depth. Hardness, then, decreased slowly and reached a minimum of 580 VHN at a maximum melt depth of 750-mu-m. Alpha'-Ti was formed in the heat-affected zone (HAZ) with a VHN of 450. Ageing treatments were performed for all specimens at 450-degrees-C and different ageing times (1-20 h). Short ageing treatments increased the hardness in the melted zone as well as in the HAZ (1-3 h). Long ageing treatments (7-20 h) resulted in uniform hardness distribution in the melted zone.
引用
收藏
页码：1404 / 1408
页数：5
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