Effect of spiral scan strategy on microstructure for additively manufactured stainless steel 17-4
Ho Yeung, Jordan Weaver, J. Chen, Y. Guo, G Yang, D. Lin, W. Tan
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.
, Weaver, J.
, Chen, J.
, Guo, Y.
, Yang, G.
, Lin, D.
and Tan, W.
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 February 3, 2023)