Effect of Post Weld Heat Treatment on Cryogenic Mechanical Properties of Electron Beam Welded Cast Inconel 718

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• 作者：Sang-Hyun Bae (1)
  Soon-Il Kwon (1)
  Joong-Geun Yoon (1)
  Je-Hyun Lee (2)
  Jeong-Hyeon Do (2)
  In-Soo Kim (2)
  Baig-Gyu Choi (2)
  Chang-Yong Jo (2)
  Hyun-Uk Hong (1)
  
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：45
• 期：2
• 页码：537-542
• 全文大小：863 KB
• 作者单位：Sang-Hyun Bae (1)
  Soon-Il Kwon (1)
  Joong-Geun Yoon (1)
  Je-Hyun Lee (2)
  Jeong-Hyeon Do (2)
  In-Soo Kim (2)
  Baig-Gyu Choi (2)
  Chang-Yong Jo (2)
  Hyun-Uk Hong (1)
  
  1. Department of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam, 641-773, Republic of Korea
  2. High Temperature Materials Research Group, Korea Institute of Materials Science, Changwon, Gyeongnam, 641-831, Republic of Korea
  
• ISSN：1543-1940

文摘

Electron beam welding of pre-aged cast 718 produced a slender Laves phase, while welds from solutionized cast 718 exhibited a blocky Laves phase with an initial stage of δ precipitation and formation of γ-γ-strengtheners after post weld heat treatment (PWHT). The presence of primary strengthener and coarse Laves particles in PWHT weld may cause reduction of the micro-plastic zone ahead of a crack, leading to a significant decrease in Charpy impact toughness at 77?K (?96?°C).