Selective Laser Melting of Maraging Steel Using Synchronized Three-Spot Scanning Strategies

The selective laser melting (SLM) process, a kind of metal additive manufacturing method, can produce parts with complex geometries that cannot be easily manufactured using material removal processes. With increasing industrial applications, there are still issues such as part quality and productivi...

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Bibliographic Details
Published in:Materials 2021-04, Vol.14 (8), p.1905
Main Authors: Cheng, Chung-Wei, Jhang Jian, Wei-You, Makala, Bhargav Prasad Reddy
Format: Article
Language:English
Subjects:
Density
Fiber lasers
Industrial applications
Laboratories
Laser beam melting
Lasers
Maraging steels
Microstructure
Production methods
Rapid prototyping
Residual stress
Scanning
Surface hardness
Surface roughness
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Summary:The selective laser melting (SLM) process, a kind of metal additive manufacturing method, can produce parts with complex geometries that cannot be easily manufactured using material removal processes. With increasing industrial applications, there are still issues such as part quality and productivity that need to be resolved. In this study, maraging steel parts fabricated by synchronized three-spot scanning strategies, i.e., lateral spatial (LS) and spatial inline (SiL), are firstly presented. The LS and SiL represent the three-spot offset direction is perpendicular and parallel to the scanning direction, respectively. A laboratory SLM machine equipped with a fiber laser and three-spot module is used to fabricate the maraging steel parts with two scanning strategies, i.e., LS and SiL. The influence of these scanning strategies on the surface roughness, relative density, hardness, molten pool shapes, and microstructures are investigated. The relative density (~99.02%) and surface hardness (~34.0 HRC) are experimentally found to be higher than the SiL by the LS scanning strategy.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14081905