Tailoring microstructure and mechanical properties by laser powder bed fusion of Ti powder recycled and treated via discharge plasma modification

被引：1
|
作者：
Liu, Z. [1 ]
Chen, T. [1 ]
Cai, W. S. [1 ]
Lu, H. Z. [1 ,2 ]
Lu, Z. C. [1 ]
Wang, D. [1 ]
Li, X. Q. [1 ]
Zhang, X. Y. [3 ]
Yang, C. [1 ]
机构：
[1] South China Univ Technol, Natl Engn Res Ctr Near Net shape Forming Met Mat, Guangdong Prov Key Lab Proc & Forming Adv Met Mat, Guangzhou 510640, Peoples R China
[2] Guangdong Polytech Normal Univ, Sch Mechatron Engn, Guangzhou 510665, Peoples R China
[3] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
来源：
SCRIPTA MATERIALIA | 2023年 / 236卷
基金：
中国国家自然科学基金;
关键词：
Additive manufacturing; Titanium; Powder processing; Microstructure and mechanical properties; PURE-TITANIUM; FEEDSTOCK; DUCTILITY; METAL;
D O I：
10.1016/j.scriptamat.2023.115662
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Powder properties are vital to the realization of high-performance metallic components via laser powder bed fusion (LPBF). However, metallic powder recycled during LPBF exhibits out-of-specification properties, thus causing components subjected to LPBF to possess inferior tensile ductility. Hence, we devise a discharge plasma modification (DPM) method to heal out-of-specification Ti powder recycled during LPBF, which can be used to manufacture high-performance bulk Ti via LPBF. The hexagonal co-phase, which is present during the LPBF of asreceived Ti powder and is caused by low O contents and high laser pressures, reappears during the LPBF of recycled and DPMed Ti powders. Bulk Ti subjected to LPBF possesses excellent tensile strength and ductility that are comparable to those of metallic Ti processed via various methods. Our results provide an inexpensive method for sustainable recycling metallic powders and manufacturing high-performance metallic components using LPBF.
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页数：7
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