Grain Structure Evolution of Al-Cu Alloys in Powder Bed Fusion with Laser Beam for Excellent Mechanical Properties

被引：20

作者：

Rasch, Michael ^{[1
,6
,7
]}

Heberle, Johannes ^{[2
,7
]}

Dechet, Maximilian A. ^{[3
,7
]}

Bartels, Dominic ^{[1
,7
]}

Gotterbarm, Martin R. ^{[4
,6
]}

Klein, Lukas ^{[1
]}

Gorunov, Andrey ^{[5
]}

Schmidt, Jochen ^{[3
,6
]}

Koerner, Carotin ^{[4
,6
]}

Peukert, Wolfgang ^{[3
,6
]}

Schmidt, Michael ^{[1
,6
,7
]}

机构：

[1] Inst Photon Technol, Dept Mech Engn, D-91052 Erlangen, Germany

[2] Bayer Laserzentrum GmbH, D-91052 Erlangen, Germany

[3] Inst Particle Technol, Dept Chem & Biol Engn, D-91058 Erlangen, Germany

[4] Chair Mat Sci & Engn Met, Dept Mat Sci & Engn, D-91052 Erlangen, Germany

[5] Kazan Natl Res Tech Univ, Kazan 420111, Russia

[6] Collaborat Res Ctr CRC 814 Addit Mfg, D-91058 Erlangen, Germany

[7] Erlangen Grad Sch Adv Opt Technol SAOT, D-91052 Erlangen, Germany

来源：

MATERIALS | 2020年 / 13卷 / 01期

关键词：

Powder Bed Fusion with Laser Beam; aluminum-copper wrought alloy; solidification conditions; hot cracking sensitivity; grain structure evolution; COOLING RATES; INCONEL; 718; MG ALLOYS; MICROSTRUCTURE; PREDICTION; MORPHOLOGY; THRESHOLD; BEHAVIOR;

D O I：

10.3390/ma13010082

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：

Powder Bed Fusion with Laser Beam of Metals (PBF-LB/M) is one of the fastest growing technology branches. More and more metallic alloys are being qualified, but processing of aluminum wrought alloys without cracks and defects is still challenging. It has already been shown that small parts with low residual porosity can be produced. However, suffering from microscopic hot cracks, the fracture behavior has been rather brittle. In this paper different combinations of temperature gradients and solidification rates are used to achieve specific solidification conditions in order to influence the resulting microstructure, as well as internal stresses. By this approach it could be shown that EN AW-2024, an aluminum-copper wrought alloy, is processable via PBF-LB/M fully dense and crack-free with outstanding material properties, exceeding those reported for commonly manufactured EN AW-2024 after T4 heat treatment.

引用

页数：22

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