MICROSTRUCTURAL AND THERMAL STABILITY OF SELECTIVE LASER MELTED 316L STAINLESS STEEL SINGLE TRACKS

Authors

  • Pavel Krakhmalev Department of Engineering and Physics Karlstad University, Sweden
  • Ina Yadroitsava Central University of Technology, Free State, South Africa
  • Gunnel Fredriksson Department of Engineering and Physics Karlstad University, Sweden
  • Igor Yadroitsev Central University of Technology, Free State, South Africa

DOI:

https://doi.org/10.7166/28-1-1466

Keywords:

stainless steel, selective laser melting, microstructure, heat treatment

Abstract

To remove residual stresses, an as-built SLM object is usually post- treated. This treatment can affect the microstructure, changing the final mechanical characteristics. This investigation is focused on the microstructural characterisation of 316L austenitic stainless steel in as-built and annealed conditions. The SLM microstructure was relatively stable up to 900°C, when cell boundaries start to disappear. At higher temperatures, an insignificant grain coarsening was detected. These microstructural changes caused a gradual drop in the hardness. The obtained result is background for the future development of post-treatment regimens to achieve a high level in the final mechanical properties of SLM objects. 

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Published

2017-05-26

How to Cite

Krakhmalev, P., Yadroitsava, I., Fredriksson, G., & Yadroitsev, I. (2017). MICROSTRUCTURAL AND THERMAL STABILITY OF SELECTIVE LASER MELTED 316L STAINLESS STEEL SINGLE TRACKS. The South African Journal of Industrial Engineering, 28(1), 12–19. https://doi.org/10.7166/28-1-1466

Issue

Vol. 28 No. 1 (2017)

Section

General Articles

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