TY - JOUR
T1 - Characterizations of the Microstructure of 9Cr-1Mo Steel Weld Joint After Long-Term Service in a Supercritical Fossil Power Plant
AU - Xu, Jian
AU - Zhong, Xiangyu
AU - Shoji, Tetsuo
AU - Tatsuki, Tadashi
AU - Matsumura, Yuji
AU - Nakashima, Makoto
PY - 2018/10/1
Y1 - 2018/10/1
N2 - 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.
AB - 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.
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U2 - 10.1007/s11661-018-4821-y
DO - 10.1007/s11661-018-4821-y
M3 - Article
AN - SCOPUS:85049690601
VL - 49
SP - 4700
EP - 4709
JO - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
JF - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
SN - 1073-5623
IS - 10
ER -