Effect of Precipitation on the Microhardness Distribution of Diode Laser Epitaxially Deposited IN718 Alloy Coating

被引：0
|
作者：
Yaocheng Zhang [1 ]
Zhuguo Li [1 ]
Pulin Nie [1 ]
Yixiong Wu [1 ,2 ]
机构：
[1] Shanghai Key Laboratory of Materials Laser Processing and Modification,School of Materials Science and Engineering,Shanghai Jiao Tong University
[2] State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University
来源：
Journal of Materials Science & Technology | 2013年 / 29卷 / 04期
基金：
中国国家自然科学基金;
关键词：
IN718; alloy; Laser epitaxial deposition; Microhardness distribution; Precipitation;
D O I：
暂无
中图分类号：
TG174.44 [金属复层保护];
学科分类号：
080503 ;
摘要：
The microhardness distribution of the diode laser epitaxially deposited IN718 alloy coating was investigated.The Laves concentration in different regions of the coating was measured by binarization processing.The strengthening phase of the coating was characterized by transmission electron microscopy(TEM).The results showed that the microhardness increased along the depth of the coating.Part of Laves dissolved into austenitic matrix during the successive laser deposition.A little amount of strengthening phase was precipitated in the bottom region of the coating.It was attributed to the heat effect from the thermal cycle of successive deposition on the microstructure in the bottom region of the epitaxially deposited coating.
引用
收藏
页码：349 / 352
页数：4
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