Hot rolling and annealing effects on the microstructure and mechanical properties of ODS austenitic steel fabricated by electron beam selective melting

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• 作者：Rui Gao ; Wen-jun Ge ; Shu Miao ; Tao Zhang ; Xian-ping Wang…
• 关键词：electron beam selective melting ; ODS ; 316L steel powder ; hot rolling ; microstructure ; tensile strength
• 刊名：Frontiers of Materials Science
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：10
• 期：1
• 页码：73-79
• 全文大小：1,536 KB
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• 作者单位：Rui Gao (1)
  Wen-jun Ge (2)
  Shu Miao (1)
  Tao Zhang (1)
  Xian-ping Wang (1)
  Qian-feng Fang (1)
  
  1. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
  2. Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Chemistry
  Chinese Library of Science
  
• 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
• ISSN：2095-0268

文摘

The grain morphology, nano-oxide particles and mechanical properties of oxide dispersion strengthened (ODS)-316L austenitic steel synthesized by electron beam selective melting (EBSM) technique with different post-working processes, were explored in this study. The ODS-316L austenitic steel with superfine nano-sized oxide particles of 30–40 nm exhibits good tensile strength (412 MPa) and large total elongation (about 51%) due to the pinning effect of uniform distributed oxide particles on dislocations. After hot rolling, the specimen exhibits a higher tensile strength of 482 MPa, but the elongation decreases to 31.8% owing to the introduction of high-density dislocations. The subsequent heat treatment eliminates the grain defects induced by hot rolling and increases the randomly orientated grains, which further improves the strength and ductility of EBSM ODS-316L steel. Keywords electron beam selective melting ODS-316L steel powder hot rolling microstructure tensile strength