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21-04-2017 | Review article | Issue 3/2017 Open Access

Chinese Journal of Mechanical Engineering 3/2017

Defect Formation Mechanisms in Selective Laser Melting: A Review

Journal:
Chinese Journal of Mechanical Engineering > Issue 3/2017
Authors:
Bi Zhang, Yongtao Li, Qian Bai
Important notes
Supported by National Natural Science Foundation of China (Grant No. 51605077), Science Challenge Project (Grant No. CKY2016212A506-0101) and Science Fund for Creative Research Groups of NSFC (Grant No. 51621064).
An erratum to this article is available at https://​doi.​org/​10.​1007/​s10033-017-0184-3.

Abstract

Defect formation is a common problem in selective laser melting (SLM). This paper provides a review of defect formation mechanisms in SLM. It summarizes the recent research outcomes on defect findings and classification, analyzes formation mechanisms of the common defects, such as porosities, incomplete fusion holes, and cracks. The paper discusses the effect of the process parameters on defect formation and the impact of defect formation on the mechanical properties of a fabricated part. Based on the discussion, the paper proposes strategies for defect suppression and control in SLM.

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