Microstructure and mechanical properties of Fe3Al based alloy fabricated by laser metal deposition

被引：6

作者：

Xu, Shurong ^{[1
]}

Wang, Jiang ^{[1
,2
]}

Wang, Zhen ^{[1
]}

Sui, Qingxuan ^{[1
]}

Zhao, Fengjun ^{[1
]}

Gong, Le ^{[1
]}

Liu, Bo ^{[1
]}

Liu, Jun ^{[1
]}

Liu, Gang ^{[3
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] State Key Lab Nickel & Cobalt Resources Comprehen, Jinchang 737100, Peoples R China

[3] Cent South Univ, Xiangya Hosp, Dept Gen Surg, Changsha 410008, Peoples R China

来源：

MATERIALS LETTERS | 2022年 / 306卷

基金：

中国国家自然科学基金;

关键词：

Iron aluminides; Laser processing; Microstructure; Mechanical properties; COMPOSITES;

D O I：

10.1016/j.matlet.2021.130919

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

As a neat-net-shape processing technology, Laser Metal Deposition (LMD) is well-suited for the preparation of intermetallic alloys. In this study, Fe3Al and Fe3Al-WC alloys were successfully fabricated by LMD. The effects of WC on the phase composition, microstructure and mechanical properties of the as-fabricated samples were investigated. The results showed that the addition of WC particles facilitated the formation of W-containing carbides and resulted in grain refinement. Taking advantage of solid solution strengthening and fine grain strengthening, the Fe3Al-WC composite alloy exhibited an improved microhardness (395.50 HV0.3) and compressive yield strength (1262 +/- 13 MPa) compared with pure Fe3Al alloy.

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