Defects evaluation of selective laser melting stainless steel 316 parts using Positron Annihilation Lifetime measurement
Document Type
Conference Proceeding
Publication Date
1-1-2018
Abstract
Alloy parts fabricated by the selected laser melting (SLM) additive manufacturing process generally contain many defects. Non-destructive Positron Annihilation Lifetime Spectroscopy (PALS) measurements were applied to evaluate these defects. The two-component positron lifetime method was used to analyze the evolution of two types of defects, mono-vacancy and vacancy cluster. Stainless steel 316 SLM samples were prepared using two sets of SLM processing parameters. For SLM samples, the temperature effect of heat treatment was examined by PALS. The effect of plastic deformation is also examined using PALS.
Publication Source (Journal or Book title)
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Recommended Citation
Yao, H., Katona, R., Zhou, J., Islam, M., Raush, J., Lu, F., & Guo, S. (2018). Defects evaluation of selective laser melting stainless steel 316 parts using Positron Annihilation Lifetime measurement. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), 8B-2018 https://doi.org/10.1115/imece2018-86729