Ductilisation and fatigue life enhancement of selective laser melted AlSi10Mg by friction stir processing

SCRIPTA MATERIALIA

卷:170

Article

Macias, Juan Guillermo Santos¹  Elangeswaran, Chola²  Zhao, Lv¹  Van Hooreweder, Brecht²  Adrien, Jerome³  Maire, Eric³  Buffiere, Jean-Yves³  Ludwig, Wolfgang³  Jacques, Pascal J.¹  Simar, Aude¹ 

[1] Catholic Univ Louvain, Inst Mech Mat & Civil Engn, IMAP, B-1348 Louvain La Neuve, Belgium

[2] Katholieke Univ Leuven, Dept Mech Engn, Celestijnenlaan 300b, B-3001 Leuven, Belgium

[3] Univ Lyon, Mateis, INSA Lyon, CNRS UMR5510, F-69621 Villeurbanne, France

关键词: Selective laser melting;    Friction stir processing;    Aluminium alloys;    Ductility;    Fatigue test;   

DOI  :  10.1016/j.scriptamat.2019.05.044

来源: Elsevier

【 摘 要 】

In the effort of expanding the already existing applications of additively manufactured parts, improving mechanical performance is essential. Friction stir processing (FSP) is a promising post-treatment solution to tackle this issue. FSP of selective laser melted AlSi10Mg leads to the globularisation of the Si-rich eutectic network, microstructural homogenisation and porosity reduction. These features have been characterised using in and ex situ mechanical testing and different imaging techniques. A significant modification of the damage mechanism is reported with an increase of the fracture strain from 0.1 to 0.4 after FSP and an enhancement over two orders of magnitude in fatigue life. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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