High-temperature tensile and creep deformation of cross-weld specimens of weld joint between T92 martensitic and Super304H austenitic steels

Abstract : The high-temperature mechanical behavior of cross-weld specimens prepared from a dissimilar weld joint between T92 martensitic and Super304H austenitic heat-resistant steels incorporating Ni-based weld metal was evaluated at temperatures up to 650 degrees C. For both high temperature tensile and creep tests, failure took place in T92 due to its faster degradation with temperature increase. The heat-affected zone of T92 played a critical role during creep deformation, resulting in type IV failure under the long-term creep condition. For the creep specimens, the location of failure shifted from the base metal region to the fine-grained heat-affected zone as the creep duration time increased from the short-term to the long-term condition. The massive precipitation of Laves phase on the grain boundaries of the fine-grained heat-affected zone during creep deformation was observed and found to be responsible for the accelerated void formation in the area leading to the premature failure.
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Materials Characterization, Elsevier, 2014, 97, pp.161-168. 〈10.1016/j.matchar.2014.09.011〉
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https://hal.univ-lorraine.fr/hal-01503885
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Soumis le : vendredi 7 avril 2017 - 17:16:47
Dernière modification le : mercredi 29 novembre 2017 - 14:51:32

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Myung-Yeon Kim, Suk-Chul Kwak, In-Suk Choi, Young-Kook Lee, Jin-Yoo Suh, et al.. High-temperature tensile and creep deformation of cross-weld specimens of weld joint between T92 martensitic and Super304H austenitic steels. Materials Characterization, Elsevier, 2014, 97, pp.161-168. 〈10.1016/j.matchar.2014.09.011〉. 〈hal-01503885〉

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