Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Effect of Process Parameter Modification and Hot Isostatic Pressing on the Mechanical Properties of Selectively Laser-Melted 316L Steel

Janusz Kluczynski
* ORCID logo ,
Lucjan Śnieżek
ORCID logo ,
Krzysztof Grzelak
ORCID logo ,
Artur Oziębło
,
Krzysztof Perkowski
,
Janusz Torzewski
ORCID logo ,
Ireneusz Szachogłuchowicz
ORCID logo ,
Krzysztof Gocman
,
Marcin Wachowski
ORCID logo ,
Bogusz Kania
Version 1 : Received: 17 April 2020 / Approved: 19 April 2020 / Online: 19 April 2020 (04:11:29 CEST)

How to cite: Kluczynski, J.; Śnieżek, L.; Grzelak, K.; Oziębło, A.; Perkowski, K.; Torzewski, J.; Szachogłuchowicz, I.; Gocman, K.; Wachowski, M.; Kania, B. Effect of Process Parameter Modification and Hot Isostatic Pressing on the Mechanical Properties of Selectively Laser-Melted 316L Steel. Preprints 2020, 2020040320. https://doi.org/10.20944/preprints202004.0320.v1 Kluczynski, J.; Śnieżek, L.; Grzelak, K.; Oziębło, A.; Perkowski, K.; Torzewski, J.; Szachogłuchowicz, I.; Gocman, K.; Wachowski, M.; Kania, B. Effect of Process Parameter Modification and Hot Isostatic Pressing on the Mechanical Properties of Selectively Laser-Melted 316L Steel. Preprints 2020, 2020040320. https://doi.org/10.20944/preprints202004.0320.v1

Abstract

Industries that rely on additive manufacturing of metallic elements, especially biomedical companies, require material science-based knowledge of how process parameters and methods affect element properties, but such phenomena are incompletely understood. In this study, we investigated the influence of selective laser melting (SLM) process parameters and additional heat treatment on mechanical properties. The research included structural analysis of residual stress, microstructure, and scleronomic hardness in low-depth measurements. Tensile tests with element deformation analysis using digital image correlation (DIC) were performed as well. Experiment results showed it was possible to observe the porosity growth mechanism and its influence on material strength. Elements manufactured with 20% lower energy density had almost half the elongation, which was directly connected with porosity growth during energy density reduction. Hot isostatic pressing (HIP) treatment allowed for a significant reduction of porosity and helped achieve properties similar to elements manufactured using different levels of energy density.

Keywords

316L austenitic steel; selective laser melting; hot isostatic pressing; microscopic investigation; residual stresses

Subject

Engineering, Mechanical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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