Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting

被引：138

作者：

Wang, Pei ^{[1
]}

Gammer, Christoph ^{[2
]}

Brenne, Florian ^{[3
]}

Prashanth, Konda Gokuldoss ^{[2
,4
]}

Mendes, Rafael Gregorio ^{[1
]}

Ruemmeli, Mark Hermann ^{[1
,5
,6
]}

Gemming, Thomas ^{[1
]}

Eckert, Juergen ^{[2
,7
]}

Scudino, Sergio ^{[1
]}

机构：

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

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

[3] Univ Kassel, Inst Mat Engn Metall Mat, Monchebergstr 3, D-34125 Kassel, Germany

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

[5] Soochow Univ, Coll Phys Optoelect & Energy, Soochow Inst Energy & Mat Innovat,Key Lab Adv Car, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China

[6] Polish Acad Sci, Ctr Polymer & Carbon Mat, M Curie Sklodowskiej 34, PL-41819 Zabrze, Poland

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

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 711卷

基金：

欧洲研究理事会;

关键词：

Selective laser melting; Al-Cu-Mg-Si alloy; Heat treatment; Microstructure; Mechanical properties; PARAMETRIC ANALYSIS; TENSILE PROPERTIES; CRYSTAL-STRUCTURE; AL-12SI ALLOY; STRENGTH; BEHAVIOR; STABILITY; TEXTURE; THERMODYNAMICS; PRECIPITATION;

D O I：

10.1016/j.msea.2017.11.063

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A heat-treatable Al-3.5Cu-1.5Mg-1Si alloy is successfully fabricated by selective laser melting and is investigated concerning microstructures and mechanical properties. The as-prepared samples show a fine-granular microstructure in the individual melt pool of the tracks and a coarse-granular microstructure in the areas between the tracks. After T6 heat treatment, the grain size of the specimens increases slightly and the Q phase formed in the as-prepared specimens transforms to Al2Cu(Mg), Mg2Si, and AlxMny. All Al-Cu-Mg-Si specimens before and after heat treatment fracture around the defects that were generated during processing and show intergranular fracture along columnar grains upon tensile quasi-static loading. The as-fabricated samples exhibit a yield strength (YS) of 223 +/- 4 MPa and an ultimate tensile strength (UTS) of 366 +/- 7 MPa with an elongation of 5.3 +/- 0.3%. After T6 heat treatment, the YS and UTS increase dramatically to 368 +/- 6 MPa and 455 +/- 10 MPa due to the formation of nano-sized Al2Cu(Mg) precipitates, while the ductility remains fairly similar.

引用

页码：562 / 570

页数：9

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