Effect of Substrate Preheating, Remelting, In-situ Presintering on Crack Formation of Ti-47Al-2Cr-2Nb Fabricated by Selective Laser Melting

被引：0
|
作者：
Shi, Xuezhi [1 ]
Huang, Yunfeng [1 ]
Li, Zhenhua [1 ]
Feng, Wuwei [1 ]
Ma, Shuyuan [2 ]
机构：
[1] School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan,316022, China
[2] School of Mechanical Engineering, Beijing Institute of Technology, Beijing,100081, China
来源：
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2022年 / 51卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Aluminum alloys - Chromium alloys - Niobium alloys - Preheating - Surface properties - Titanium alloys;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The methods of substrate preheating, remelting and in-situ presintering were proposed to fabricate Ti-47Al-2Cr-2Nb by selective laser melting (SLM). The effects of these approaches on the formation of cracks and surface quality were investigated. The results indicate that substrate preheating, remelting and in-situ presintering powder can reduce the formation of cracks to a certain extent, and the density is increased by 1.71%~4.34%. Remelting contributes to improvement of the surface quality but greatly reduces the productivity. In addition, the combination of substrate preheating and in-situ presintering can effectively prevent the occurrence of cracks, and the density is over 99%. Copyright © 2022, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.
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页码：2739 / 2744
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