Effect of scan strategy on density and metallurgical properties of 17-4PH parts printed by Selective Laser Melting (SLM)
By R. Rashid, Syed H. Masood, D. Ruan, S. Palanisamy, Milan Brandt. 2017
218 citations recorded by the source corpus.
Selective Laser Melting (SLM) is a metal additive manufacturing process wherein a laser beam is used to melt and fuse metal powder layer by layer to create a part. This technique involves the interaction of various process parameters such as laser power, scanning speed, powder layer thickness and scan strategy. In this study, the effects of two different scan strategies were investigated and the 17-4PH stainless steel samples fabricated using these strategies, both in as-fabricated and heat-treated conditions, were characterized in terms of relative density, microstructural phase composition and micro-hardness. It was found that the samples printed with double scan strategy showed improvement in the relative density as compared to that printed with single scan strategy. Moreover, it was observed that the samples fabricated using the double scan strategy showed higher hardness than the samples printed using single scan strategy which was attributed to the high phase distribution of martensite than the retained austenite in these samples. In addition, the heat treatment of the as-fabricated samples produced uniform distribution of tempered martensite-dominant phase with negligible retained austenite, resulting in improved hardness as comparable to the heat-treated wrought sample.
Subfields: Automotive Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/ef1cf8f426f01e4893f22e40802683a8bf41b893
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In Automotive Engineering
- A. du Plessis
- I. Yadroitsava
- I. Yadroitsev
- Jialuo Ding
- Stewart W. Williams
- S. Ganguly
- Karan S. Derekar
- Volker Wesling
In Mechanical Engineering
- A. du Plessis
- I. Yadroitsava
- I. Yadroitsev
- Jialuo Ding
- S. Ganguly
- Stewart W. Williams
- Karan S. Derekar
- Ahmet Taşdemir
Citations in the corpus
- X-Ray Microcomputed Tomography in Additive Manufacturing: A Review of the Current Technology and Applications (2018, unknown): “39 Geometric tolerances and deviations from CAD design of microchannels were analyzed by CT scans in Snyder et al. 72 On the base of this deviation data, scaling parameters can be introduced to precompensate for deviations resulting in a more optimized final part dimension, taking into account…”
- Wire + Arc Additive Manufacture of 17-4 PH stainless steel: Effect of different processing conditions on microstructure, hardness, and tensile strength (2019, methodology): “Nevertheless, additional mechanical properties characterization has been performed on selective laser melted 17-4 PH. Comprehensive hardness maps were presented by Rashid et al. (2017) for two different SLM scan strategies, single and double melting of each layer.”
- Effects of defects on mechanical properties in metal additive manufacturing: A review focusing on X-ray tomography insights (2020, background): “scans, especiallywith regard to the resolution limit aswas shown in various studies [26,28,29,48,57,58].”