Defect prevention in selective laser melting components:Compositional and process effects

Sabzi, H.E. and Rivera-Díaz-del-Castillo, P.E.J. (2019) Defect prevention in selective laser melting components:Compositional and process effects. Materials, 12 (22). ISSN 1996-1944

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Abstract

A model to predict the conditions for printability is presented. The model focuses on crack prevention, as well as on avoiding the formation of defects such as keyholes, balls and lack of fusion. Crack prevention is ensured by controlling the solidification temperature range and path, as well as via quantifying its ability to resist thermal stresses upon solidification. Defect formation prevention is ensured by controlling the melt pool geometry and by taking into consideration the melting properties. The model’s core relies on thermodynamics and physical analysis to ensure optimal printability, and in turn offers key information for alloy design and selective laser melting process control. The model is shown to describe accurately defect formation of 316L austenitic stainless steels reported in the literature.

Item Type:
Journal Article
Journal or Publication Title:
Materials
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500
Subjects:
ID Code:
139591
Deposited By:
Deposited On:
12 Dec 2019 15:20
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Sep 2020 06:02