Failure Analysis of the Tree Column Structures Type AlSi10Mg Alloy Branches Manufactured by Selective Laser Melting

Peikang Bai; Pengcheng Huo; Taotao Kang; Zhanyong Zhao; Wenbo Du; Minjie Liang; Yuxin Li; Haihong Liao; Yun Liu

doi:10.3390/ma13183969

Materials (Sep 2020)

Failure Analysis of the Tree Column Structures Type AlSi10Mg Alloy Branches Manufactured by Selective Laser Melting

Peikang Bai,
Pengcheng Huo,
Taotao Kang,
Zhanyong Zhao,
Wenbo Du,
Minjie Liang,
Yuxin Li,
Haihong Liao,
Yun Liu

Affiliations

Peikang Bai: School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Pengcheng Huo: School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Taotao Kang: Capital Aerospace Machinery Corporation Limited, Beijing 100072, China
Zhanyong Zhao: School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Wenbo Du: National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China
Minjie Liang: School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Yuxin Li: School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Haihong Liao: School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Yun Liu: School of Materials Science and Engineering, North University of China, Taiyuan 030051, China

DOI: https://doi.org/10.3390/ma13183969
Journal volume & issue: Vol. 13, no. 18
p. 3969

Abstract

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AlSi10Mg alloy branches were fabricated by selective laser melting (SLM), and the branches were employed to evaluate their effect on the mechanical properties. When the porous branches were compressed along its building direction, the tree column structures-type AlSi10Mg alloy branches collapsed twice, which had typical elastic, shear, collapse, and densification stages. The compressive stress concentration at the interface between the support and the porous body caused the fracture of the tree column structures-type AlSi10Mg alloy branches. The fracture surface indicated that the prepared tree-type branches were distributed with different shapes of dimples, and the Si content inside the dimples was higher than that of the edge. The morphology of the Al-Si eutectic structure formed by SLM and the stress concentration at the Al/Al-Si-eutectic interface affected the fracture morphology and Si content distribution.

Published in Materials

ISSN: 1996-1944 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Technology: Engineering (General). Civil engineering (General); Science: Natural history (General): Microscopy; Science: Physics: Descriptive and experimental mechanics
Website: http://www.mdpi.com/journal/materials/

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