期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 9, 期 5, 页码 9506-9522出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2020.06.090
关键词
Additive manufacturing; Al-Si-10; MgMicrostructure; Micro-hardness; Layer rotation; Residual stresses; Surface topography
资金
- China Post-Doctoral Science Foundation [2019TQ0186]
- National Natural Science Foundation of China [51922066]
- Natural Science Outstanding Youth Fund of Shandong Province [ZR2019JQ19]
- Key Laboratory of High-efficiency and Clean Mechanical Manufacture at Shandong University, Ministry of Education
Selective laser melting (SLM) is one of the appreciable technologies that is directly used to manufacture the intricate and highly accurate parts within short period of time. However, the involvement of various parameters in SLM process is gaining more and more attention of the scientific community. In this work, the research efforts have been made to emphasize on the effects of one of the prominent parameters of SLM process i.e., layer rotation on the microstructure, grain size, surface topography, residual stresses and mechanical behaviour of selective laser melted Al-Si-10Mg alloy. The standard benchmark components were fabricated by varying the layer rotation values at three different angles i.e., 0 degrees, 45 degrees and 90 degrees. The result of microstructural analysis (using EBSD, SEM and XRD) revealed that the Al-Si-10Mg produced the cellular structure having less pores and defects at 90-degree layer rotation angle. The grain size, residual stresses and surface roughness (77.02%) values were also reduced with increase in layer rotation angle values. Furthermore, the micro-hardness (upto 19.6 %), tensile strength, %elongation (87.29 %) and relative density values were significantly enhanced at higher angle of layer rotations mainly due to the reduction in porosity and better interlayer metallurgical bonding. (C) 2020 The Author(s). Published by Elsevier B.V.
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