Identification and Characterization of Intercritical Heat-Affected Zone in As-Welded Grade 91 Weldment

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• 作者：Yiyu Wang ; Rangasayee Kannan ; Leijun Li
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：47
• 期：12
• 页码：5680-5684
• 全文大小：2,671 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Structural Materials
  Physical Chemistry
  Ceramics,Glass,Composites,Natural Materials
  
• 出版者：Springer Boston
• ISSN：1543-1940
• 卷排序：47

文摘

A metallurgical method is proposed for locating the intercritical heat-affected zone in the as-welded Grade 91 steel. New austenitic grains, preferentially formed along the original prior austenite grain boundaries, are characterized to contain finer M₂₃C₆ carbides and higher strain levels than the original prior austenite grains. Kurdjumov–Sachs Group 1 variant pairs, with a low misorientation of 7 deg within a martensitic block, are identified as the dominant variants in the new PAGs.