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Article

The Effects of Heat Treatment Temperatures on the Properties of 316L Stainless Steel Produced via Laser Powder Bed Fusion

1
College of Systems & Society, The Australian National University, Canberra, ACT 2600, Australia
2
School of Mechanical Engineering, Shandong University of Technology, Zi’bo 255049, China
*
Author to whom correspondence should be addressed.
Materials 2025, 18(13), 3167; https://doi.org/10.3390/ma18133167
Submission received: 24 May 2025 / Revised: 27 June 2025 / Accepted: 27 June 2025 / Published: 3 July 2025
(This article belongs to the Section Metals and Alloys)

Abstract

316L stainless steel (316L SS) exhibits excellent corrosion resistance, mechanical properties, and biocompatibility, but the rapid melting and solidification of the laser powder bed fusion (PBF-LB/M) process reduce the properties of the newly formed parts. This study aims to enhance the mechanical properties of PBF-LB/M PBF-LB/M-formed 316L SS parts by investigating the effects of various heat treatment temperatures. The results show that an appropriate heat treatment temperature can improve the microstructure and mechanical properties of the formed parts. Lower temperatures have minimal effects on performance; however, at 1100 °C, recrystallization occurs, resulting in more uniform grain structures, improved densification, and substantial stress relief. The residual stress is reduced by 85.59% compared to the untreated PBF-LB/M samples, while the ferrite content is significantly decreased, making the phase structure more homogeneous. Although both yield strength and tensile strength decrease, plasticity improves by 21.11%.
Keywords: laser powder bed fusion (PBF-LB/M); heat treatment; microstructure; mechanical properties; 316L stainless steel laser powder bed fusion (PBF-LB/M); heat treatment; microstructure; mechanical properties; 316L stainless steel

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MDPI and ACS Style

Zhou, Y.; Chai, M.; Zheng, F.; Li, Z. The Effects of Heat Treatment Temperatures on the Properties of 316L Stainless Steel Produced via Laser Powder Bed Fusion. Materials 2025, 18, 3167. https://doi.org/10.3390/ma18133167

AMA Style

Zhou Y, Chai M, Zheng F, Li Z. The Effects of Heat Treatment Temperatures on the Properties of 316L Stainless Steel Produced via Laser Powder Bed Fusion. Materials. 2025; 18(13):3167. https://doi.org/10.3390/ma18133167

Chicago/Turabian Style

Zhou, Yizhi, Mingxia Chai, Fu Zheng, and Zhiyong Li. 2025. "The Effects of Heat Treatment Temperatures on the Properties of 316L Stainless Steel Produced via Laser Powder Bed Fusion" Materials 18, no. 13: 3167. https://doi.org/10.3390/ma18133167

APA Style

Zhou, Y., Chai, M., Zheng, F., & Li, Z. (2025). The Effects of Heat Treatment Temperatures on the Properties of 316L Stainless Steel Produced via Laser Powder Bed Fusion. Materials, 18(13), 3167. https://doi.org/10.3390/ma18133167

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