Effects of mechanical properties on precipitation hardening stainless steel by selective laser melting,hot isostatic pressing,solid-solution and aging treatments |
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| Authors: | Shih-Hsien Chang Yi-Min Liu Kuo-Tsung Huang Shang-Chih Wang |
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| Affiliation: | 1. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan, Republic of Chinachangsh@ntut.edu.tw;3. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan, Republic of China;4. Department of Auto-Mechanics, National Kangshan Agricultural Industrial Senior High School, Kaohsiung, Taiwan, Republic of China;5. Voestalpine Technology Institute (Asia) Co., Ltd., Nantou, Taiwan, Republic of China |
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| Abstract: | ABSTRACTThe selective laser melting (SLM) process has gained considerable attention from industry and academia over the recent years. Furthermore, the hot isostatic pressing (HIP) technique has been widely applied as a post-treatment to increase the relative density of the fabricated parts. The main aim of this study is to investigate the effects of porosity elimination and mechanical properties on precipitation hardening stainless steel using SLM, HIP, solid-solution and aging treatments. This study also applied various laser scanning pitches (170, 210 and 250?μm), so that a significant phase transformation occurred between the SLM, HIP, solid-solution and aging treatments. The results showed that the laser scanning pitch was 170?μm, and after HIP, solid-solution and aging treatments the materials possessed optimal mechanical properties. The highest hardness (48.8?±?0.5 HRC) and TRS (2247.0?±?157.8?MPa) could be acquired. |
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| Keywords: | Selective laser melting hot isostatic pressing precipitation hardening stainless steel phase transformation solid-solution TRS |
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