文献类型：期刊文献

英文题名：Selective laser melting of CoCrFeNiMn high entropy alloy powder modified with nano-TiN particles for additive manufacturing and strength enhancement: Process, particle behavior and effects

作者：Li, Bo[1];Zhang, Lei[1];Xu, Yi[2];Liu, Zhiyuan[1];Qian, Bo[3];Xuan, Fuzhen[3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Addit Mfg & Intelligent Equipment Res Inst, Shanghai 200237, Peoples R China;[2]Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA;[3]Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2020

卷号：360

起止页码：509

外文期刊名：POWDER TECHNOLOGY

收录：;EI(收录号：20194807736169);WOS:【SCI-EXPANDED(收录号:WOS:000506712100046)】；

基金：The authors gratefully acknowledge the support by International Collaboration Program of sponsor-id="https://doi.org/10.13039/501100003399" xlink:role="http://www.elsevier.com/xml/linkingroles/grant-sponsor" xlink:type="simple"> Science and Technology Commission of Shanghai Municipality, China (No.19110712500), sponsor-id="https://doi.org/10.13039/501100004608" xlink: role="http://www.elsevier.com/xml/linking-roles/grant-sponsor" xlink:type="simple"> Natural Science Foundation for Young Scientists of Jiangsu Province, China (No.BK20160407) and sponsor-id="https://doi.org/10.13039/501100001809" xlink:role="http://www.elsevier.com/xml/linking-roles/grant-sponsor" xlink: type="simple"> National Natural Science Foundation of China (No.51505293).

语种：英文

外文关键词：Selective laser melting; High entropy alloy; Composite; Additive manufacturing; Strength

摘要：Selective Laser Melting (SLM) was applied for Additive Manufacturing (AM) of CoCrFeNiMn high entropy alloy (HEA) and TiNp/CoCrFeNiMn composite, with the tailored laser parameters for as-printed bulk densification after the process optimization. The pre-alloyed HEA powder by gas-atomization was modified with nano-TiN ceramic particles on the powder surface layer and employed to fabricate HEA matrix composite with uniformly dispersed TiN reinforcements via SLM. The hierarchical microstructures with strong crystallographic textures were generated in the as-printed HEA parts. While in the TiNp/HEA composite, the remarkably refined and nearly equiaxial HEA matrix grains were produced due to the contribution of introduced TiN particles. The average ultimate tensile strength (sigma(UTS)) of as-printed composite achieved 1036 MPa with the average elongation to fracture (e(f)) as similar to 12%. By contrast, the average sigma(UTS) and e(f) of as-printed HEA were 601 MPa and similar to 30% respectively. The strengthening mechanism of the SLM-fabricated TiNp/HEA composite was further elucidated. (C) 2019 Elsevier B.V. All rights reserved.