Investigation of Metallography and Behavior of M-A Constituent in Weld HAZ of HSLA Steels(Materials, Metallurgy & Weldability)
スポンサーリンク
概要
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The metallography of M-A constituent was investigated in simulated underbead zone of HT 80 and HT 100 QT steels. It was found that M-A consistsed of cementite precipitated from retained austenite, structurally free cementite precipitated from lath martensite during its self-tempering, lath martensite, plate martensite and small portion of retained austenite. Investigation was also made of the effect of M-A on the deformation and fracture behaviors of specimens. M-A deteriorated the ductility of HAZ by initiation of dimpled fracture. Dimples could initiate from microvoids coalescence at the interface between M-A and matrix and further on cracked or fragmented M-A particles. M-A could contribute to cleavage fracture propagation by reinitiating the fracture. Elongated and massive M-A constituent were found in steels investigated.
著者
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MATSUDA Fukuhisa
Osaka University
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IKEUCHI Kenji
Osaka University
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LI Zhonglin
Osaka University
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OKADA Hitoshi
Kurimoto, Ltd.
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Ikeuchi K
Kyoto Univ. Kyoto Jpn
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Matsuda F
Osaka University
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Hrivnak Ivan
Osaka University:technical Univ.
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Ikeuchi K
大阪大学接合科学研究所
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Li Zhonglin
Osaka University:harbin Institute Of Technology
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Hrivnak Ivan
大阪大学溶接工学研究所:kosice工科大学
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Okada H
Manufacturing Department Kurimoto Ltd.
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Matsuda Fukuhisa
Osaka Univ.
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