Characterizations of the Microstructure of 9Cr-1Mo Steel Weld Joint After Long-Term Service in a Supercritical Fossil Power Plant

Jian Xu, Xiangyu Zhong, Tetsuo Shoji, Tadashi Tatsuki, Yuji Matsumura, Makoto Nakashima

研究成果: Article査読

2 被引用数 (Scopus)

抄録

In the present work, the microstructure, micro-hardness, and chemical composition of 9Cr-1Mo weld joint after long-term service in a supercritical power plant were analyzed by using various analytical techniques. The hardness profile showed a maximum at the fusion boundary and a minimum in the region of the fine grain heat-affected zone (FGHAZ). Many cavities along the grain boundaries and in grains were also observed in the FGHAZ. Ferrite zones with lower hardness and larger grain sizes were observed in the weld metal. The formation mechanisms of the cavities and ferrite zones were discussed based on the results.

本文言語English
ページ(範囲)4700-4709
ページ数10
ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
49
10
DOI
出版ステータスPublished - 2018 10月 1

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金

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