Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 867, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159103
Keywords
AlSiMg1.4 alloy; Selective laser melting; Microstructure; Mechanical properties
Categories
Funding
- National Key Research and Development Program of China [2016YFB1100103]
- Natural Science Foundation of China [51671045, 52001140]
- Natural Science Foundation for Young Scientists of Jiangsu, China [BK20180985]
- Natural Science Foundation in Higher Education of Jiangsu, China [18KJB430011]
- Open Foundation of Zhenjiang Key Laboratory for high technology research on marine functional films [ZHZ2019001]
- CityU grant [9360161]
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A high Mg-content AlSiMg1.4 alloy was designed for selective laser melting (SLM) processing, exhibiting high strength and elongation. The presence of Mg-Si atomic clusters in the alloy acts as strong obstacles to dislocation gliding, providing an additional strengthening mechanism.
A high Mg-content AlSiMg1.4 alloy was designed for selective laser melting (SLM) processing. The SLMed AlSiMg1.4 alloy exhibits a high yield strength of 341 +/- 14 MPa and a high ultimate tensile strength of 518 +/- 6 MPa, along with a total elongation of 7.1 +/- 0.4%. The composition profile in the alpha-Al matrix of the alloy manifests in-phase concentration fluctuations of Mg and Si. The presence of high density Mg-Si atomic clusters as strong obstacles to dislocation gliding is suggested to provide an additional strengthening mechanism for the SLMed Al-Si-Mg alloy. (C) 2021 Elsevier B.V. All rights reserved.
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