Advances in Manufacturing ›› 2025, Vol. 13 ›› Issue (3): 634-654.doi: 10.1007/s40436-024-00528-7

• • 上一篇    

Effect of annealing and strain rate on the microstructure and mechanical properties of austenitic stainless steel 316L manufactured by selective laser melting

Zhi-Ping Zhou1, Zhi-Heng Tan1, Jin-Long Lv1, Shu-Ye Zhang2, Di Liu3   

  1. 1. Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, Guangdong, People's Republic of China;
    2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, People's Republic of China;
    3. Aerospace Science and Industry Defense Technology Research and Test Center, Beijing, 100854, People's Republic of China
  • 收稿日期:2023-12-09 修回日期:2024-02-16 发布日期:2025-09-19
  • 通讯作者: Jin-Long Lv,E-mail:ljltsinghua@126.com;Shu-Ye Zhang,E-mail:syzhang@hit.edu.cn E-mail:ljltsinghua@126.com;syzhang@hit.edu.cn
  • 作者简介:Zhi-Ping Zhou received his Master’s degree from SinoFrench Institute of Nuclear Engineering and Technology, Sun Yat-sen University. His current research interest is metal laser additive manufacturing, plastic deformation of metal and advanced sensor manufacturing.
    Zhi-Heng Tan received his Master’s degree from SinoFrench Institute of Nuclear Engineering and Technology, Sun Yat-sen University. His current research interests include metal laser additive manufacturing.
    Jin-Long Lv received his PhD degree in Materials Science from Beijing University of Aeronautics and Astronautics, Beijing, China. He is an associate professor of the Sino-French Institute of Nuclear Engineering and Technology in Sun Yat-sen University. His current research interests include metal laser additive manufacturing and plastic deformation mechanism and dislocation structure evolution and mechanism of metal toughening and strong plasticization and corrosion.
    Shu-Ye Zhang received his PhD degree in Materials Science and Engineering from KAIST Korea Academy of Advanced Science and Technology. He currently works at the School of Materials Science and Engineering, Harbin Institute of Technology. His research interest is novel and advanced materials applications.
    Di Liu received her Master degree in Materials Science and Engineering from General Research Institute of Nonferrous Metals. Her currently works at Aerospace Science and Industry Defense Technology Research and Test Center. She does research in advanced materials applications.
  • 基金资助:
    This research was funded by the National Key Research and Development Program of China (Grant No. 2020YFE0205300), the National Natural Science Foundation of China (Grant No. U21A20128), the Chengdu Xianhe Semiconductor Technology Co., Lt., China (Grant No. 45000-71020047), and the Chengdu Rihe Xianrui Technology Co., Ltd., China (Grant No. 45000-71020048).

Effect of annealing and strain rate on the microstructure and mechanical properties of austenitic stainless steel 316L manufactured by selective laser melting

Zhi-Ping Zhou1, Zhi-Heng Tan1, Jin-Long Lv1, Shu-Ye Zhang2, Di Liu3   

  1. 1. Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, Guangdong, People's Republic of China;
    2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, People's Republic of China;
    3. Aerospace Science and Industry Defense Technology Research and Test Center, Beijing, 100854, People's Republic of China
  • Received:2023-12-09 Revised:2024-02-16 Published:2025-09-19
  • Supported by:
    This research was funded by the National Key Research and Development Program of China (Grant No. 2020YFE0205300), the National Natural Science Foundation of China (Grant No. U21A20128), the Chengdu Xianhe Semiconductor Technology Co., Lt., China (Grant No. 45000-71020047), and the Chengdu Rihe Xianrui Technology Co., Ltd., China (Grant No. 45000-71020048).

摘要: New insights are proposed regarding the α′-martensite transformation and strengthening mechanisms of austenitic stainless steel 316L fabricated using selective laser melting (SLM-ed 316L SS). This study investigates the effects of annealing on the microstructural evolution, mechanical properties, and corrosion resistance of SLM-ed 316L SS specimens. The exceptional ultimate tensile strength (807 MPa) and good elongation (24.6%) of SLM-ed 316L SS was achieved by SLM process and annealing treatment at 900 ℃ for 1 h, which was attributed to effective dislocation strengthening and grain boundary strengthening. During tensile deformation, annealed samples exhibited deformation twinning as a result of the migration from high-angle grain boundaries to low-angle grain boundaries, facilitating the α′-martensite transformation. Consequently, a deformation mechanism model is proposed. The contribution of dislocation strengthening (~61.4%) is the most important strengthening factor for SLM-ed 316L SS annealed 900 ℃ for 1 h, followed by grain boundary strengthening and solid solution strengthening. Furthermore, the corrosion resistance of SLM-ed 316L SS after annealing treatment is poor due to its limited re-passivation ability.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00528-7

关键词: Selective laser melting (SLM), 316L stainless Steel, Strain rate, Mechanical properties

Abstract: New insights are proposed regarding the α′-martensite transformation and strengthening mechanisms of austenitic stainless steel 316L fabricated using selective laser melting (SLM-ed 316L SS). This study investigates the effects of annealing on the microstructural evolution, mechanical properties, and corrosion resistance of SLM-ed 316L SS specimens. The exceptional ultimate tensile strength (807 MPa) and good elongation (24.6%) of SLM-ed 316L SS was achieved by SLM process and annealing treatment at 900 ℃ for 1 h, which was attributed to effective dislocation strengthening and grain boundary strengthening. During tensile deformation, annealed samples exhibited deformation twinning as a result of the migration from high-angle grain boundaries to low-angle grain boundaries, facilitating the α′-martensite transformation. Consequently, a deformation mechanism model is proposed. The contribution of dislocation strengthening (~61.4%) is the most important strengthening factor for SLM-ed 316L SS annealed 900 ℃ for 1 h, followed by grain boundary strengthening and solid solution strengthening. Furthermore, the corrosion resistance of SLM-ed 316L SS after annealing treatment is poor due to its limited re-passivation ability.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00528-7

Key words: Selective laser melting (SLM), 316L stainless Steel, Strain rate, Mechanical properties