Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 788, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2020.139616
Keywords
Superalloy; Selective laser melting; Scanning strategy; Tensile properties; Heterogeneous microstructure
Categories
Funding
- project of 'Manufacturing the swirl nozzles of the high pressure turbine by selective laser melting'
- National Natural Science Foundation of China (NSFC) [51771207]
- Fundamental research project from Shenyang National Laboratory for Materials Science [L2019R18]
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Tensile properties of GH4169 fabricated by selective laser melting under stripe and chessboard scanning strategies were investigated. The results show that the GH4169 specimens fabricated by the chessboard scanning strategy have higher tensile strengths and more evident tensile anisotropy than that of the specimens fabricated by the stripe scanning strategy. The strain hardening ability of the chessboard specimens superior to that of the stripe specimen is mainly attributed to the difference in residual stress magnitude arising from different scanning strategies and the unique processing-induced heterogeneous grain structure in the chessboard specimens.
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