Study on laser powder bed fusion of nickel-base alloy of G-surface structure: scanning strategy, properties and compression properties

Aiming at laser powder bed fusion of GH3536 nickel base alloy, the effects of different scanning strategies on microstructure, porosity and mechanical properties were explored. In the aspect of microstructure and micro hardness of the sample, three scanning strategies had little difference; in the a...

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Bibliographic Details
Published in:Scientific reports 2021-03, Vol.11 (1), p.6947-6947, Article 6947
Main Authors: Qian, Bo, Fan, Hongri, Zhang, Jianrui, Li, Tengfei, Xi, Jiangtao, Qiu, Zhijun
Format: Article
Language:English
Subjects:
639/166/988
639/301
639/301/1005
639/301/1034
639/301/299
639/301/930
639/925/357
639/925/928
639/925/930
Absorption
Compression
Humanities and Social Sciences
Lasers
Mechanical properties
multidisciplinary
Nickel
Porosity
Scanning
Science
Science (multidisciplinary)
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Summary:Aiming at laser powder bed fusion of GH3536 nickel base alloy, the effects of different scanning strategies on microstructure, porosity and mechanical properties were explored. In the aspect of microstructure and micro hardness of the sample, three scanning strategies had little difference; in the aspect of macro mechanical properties of the sample, the slope subarea scanning was better than the helix and island scanning. On this basis, the slope subarea scanning was selected as the optimal scanning strategy to form the G-surface structure, and the compression performance of G-surface was studied. The results showed that: (1) the compression performance of G-surface structure was smaller than that of solid structure, The compression strength of G-surface can only reach about 20% of solid structure: the average strength value of G-surface is 220 MPa, solid structure is 1.1 GMpa; while G-surface structure had a smooth compression curve, which indicated the good energy absorption characteristics; (2) with the increase of wall thickness, the mechanical performance of G-surface structure was also enhanced, while the energy absorption capacity was constantly reduced; (3) with the same wall thickness, the compression performance of sample in building direction (BD) is higher than that in horizontal direction (HD).
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-86213-2