Hot-wire arc additive manufacturing of aluminum alloy with reduced porosity and high deposition rate

被引:136
作者
Fu, Rui [1 ]
Tang, Shuiyuan [1 ]
Lu, Jiping [1 ]
Cui, Yinan [2 ]
Li, Zixiang [1 ]
Zhang, Haorui [1 ]
Xu, Tianqiu [1 ]
Chen, Zhuo [1 ]
Liu, Changmeng [1 ]
机构
[1] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
[2] Tsinghua Univ, Sch Aerosp Engn, Appl Mech Lab, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
Hot-wire arc additive manufacturing; 2024; alloy; Macro; microstructures; Pores; Mechanical properties; Deposition rate;
D O I
10.1016/j.matdes.2020.109370
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Wire arc additive manufacturing (WAAM) technology has attracted considerable interest in large-scale metallic components, but porosity and low deposition rate are the two dominating technical challenges in WAAM of aluminum alloy. In order to effectively solve these problems, a novel method of hot-wire arc additive manufacturing is used to fabricate aluminum alloy. Systematic studies are carried out to investigate the formation mechanism of the pores, the macro/microstructures, as well as the mechanical properties of the parts. It is found that the pores were mainly clustered at the inter-layer. With the increase of the hot-wire current, the porosity firstly decreases, then reaches a minimum at 100 A, and afterwards increases progressively. The corresponding density changes from 96.8% at the hot-wire current of 0 A to 99.6% at 100 A. Increasing the current from 0 A to 120 A also leads to the increase of the deposition rate by about 3.5 times, and the gradual increase of the size of equiaxed grain by 1.6 times. The mechanical properties are considerably improved with the decrease of the porosity. (c) 2020 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
引用
收藏
页数:13
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