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Effect of spiral scan strategy on microstructure for additively manufactured stainless steel 17-4

Published

Author(s)

Ho Yeung, Jordan Weaver, J. Chen, Y. Guo, G Yang, D. Lin, W. Tan

Abstract

The effect of the scan strategy on the microstructure is investigated on a custom-built laser powder bed fusion additive manufacturing testbed. Eight stainless steel 17-4 cubic parts were built to compare two different scan strategies: conventional and spiral. The processes were in-situ monitored by a high-speed camera coaxially aligned to the heating laser, and the parts built were characterized by micro-indentation test and optical microscopy. It is found the spiral scan strategy results in a much larger meltpool area than the conventional scan strategy, and the parts thus built exhibits an equiaxed grain structure with 54% higher hardness value.
Citation
Manufacturing Letters
Volume
29

Keywords

Additive manufacturing, scan strategies, microstructure, hardness

Citation

Yeung, H. , Weaver, J. , Chen, J. , Guo, Y. , Yang, G. , Lin, D. and Tan, W. (2021), Effect of spiral scan strategy on microstructure for additively manufactured stainless steel 17-4, Manufacturing Letters, [online], https://doi.org/10.1016/j.mfglet.2021.04.005, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=931812 (Accessed September 24, 2023)
Created April 30, 2021, Updated February 23, 2022