Microstructures and mechanical properties of Fe-Cr stainless steel parts fabricated by ultrasonic vibration-assisted laser engineered net shaping process

被引：78
|
作者：
Ning, Fuda [1 ]
Cong, Weilong [1 ]
机构：
[1] Texas Tech Univ, Dept Ind Engn, Lubbock, TX 79409 USA
来源：
MATERIALS LETTERS | 2016年 / 179卷
关键词：
Microstructure; Mechanical properties; Ultrasonic vibration; Laser engineered net shaping; Powder technology; ALLOY;
D O I：
10.1016/j.matlet.2016.05.055
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper studied fabrication of Fe-Cr stainless steel parts using the novel ultrasonic vibration-assisted laser engineered net shaping (UV-A LENS) process and investigated the effects of ultrasonic vibration on the microstructures and mechanical properties. The results showed that cross-sectional morphology as well as internal microstructure of the parts were changed by applying ultrasonic vibration in LENS process. Porosity, micro-cracks, and microstructural grain size were remarkably decreased due to the actions and influences of ultrasonic vibration. In addition, mechanical properties of the parts fabricated by UV-A LENS process were significantly improved compared with that of the parts fabricated by LENS without ultrasonic vibration. These findings indicated that UV-A LENS was an effective process to generate uniform morphology and fine microstructures to improve the mechanical properties of the parts. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：61 / 64
页数：4
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