Microstructure and mechanical properties of Al-Cu alloys fabricated by selective laser melting of powder mixtures

被引：85

作者：

Wang, P. ^{[1
]}

Deng, L. ^{[1
]}

Prashanth, K. G. ^{[1
,2
,3
]}

Pauly, S.

Eckert, J. ^{[3
,4
]}

Scudino, S. ^{[1
]}

机构：

[1] IFW Dresden, Inst Complex Mat, Helmholtzstr 20, D-01069 Dresden, Germany

[2] Norwegian Univ Sci & Technol, Dept Mfg & Civil Engn, Teknol Vegen 22, N-2815 Gjovik, Norway

[3] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[4] Univ Leoben, Dept Mat Phys, Jahnstr 12, A-8700 Leoben, Austria

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 735卷

基金：

欧洲研究理事会;

关键词：

Selective laser melting; Aluminum-copper alloys; Microstructure; Mechanical properties; BEHAVIOR;

D O I：

10.1016/j.jallcom.2017.10.168

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Selective laser melting was used to in-situ fabricate Al-xCu (x = 4.5, 6, 20, 33 and 40 wt%) samples from mixtures of Al-4.5Cu/Cu powders. The insufficient Cu solute diffusion during the layer-by-layer processing results in an inhomogeneous microstructure around the introduced Cu powders. The boundaries between the molten pools of all alloys display different microstructural characteristics, indicating the occurrence of both high- and low-cooling-rate zones as well as heat-affected zones. With increasing Cu content, the Al2Cu phase in the alloys increases, improving the strength of the material. Al-33Cu with a nano-eutectic microstructure exhibits the highest compressive strength exceeding 1000 MPa. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：2263 / 2266

页数：4

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