Creep Rupture Behavior in Dissimilar Weldment between FB2 and 30Cr1Mo1V Heat-Resistant Steel

Creep rupture behavior of dissimilar weldments between FB2 and 30Cr1Mo1V heat-resistant steel by multipass welding at 783 K (510°C) under different stresses (260 to 420 MPa) was researched. The fitted creep rupture exponent is 14.53, and the 10,000 h extrapolating strength values predicted by the po...

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Published in:International journal of photoenergy 2021-12, Vol.2021, p.1-11
Main Authors: Xiong, Jiankun, Yang, Jianping, Zhao, Haiyan, Yang, Lin, Guo, Yang, Nie, Fuheng, Xu, Dexing, Yu, Liping, Cao, Fenghong
Format: Article
Language:English
Subjects:
Coalescing
Crack initiation
Creep (materials)
Creep tests
Dimpling
Dislocation density
Ductile fracture
Ductility
Fracture mechanics
Fracture surfaces
Heat resistant steels
High temperature
Laves phase
Metals
Morphology
Precipitates
Rupture
Scanning electron microscopy
Steel
Stress concentration
Transgranular fracture
Weld metal
Weldments
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cited_by cdi_FETCH-LOGICAL-c3859-4fb398b03a233e575333a99c2f2bb5f5cd59b431398c9061b43de646ed9cdb5d3
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container_title International journal of photoenergy
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creator Xiong, Jiankun
Yang, Jianping
Zhao, Haiyan
Yang, Lin
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Xu, Dexing
Yu, Liping
Cao, Fenghong
description Creep rupture behavior of dissimilar weldments between FB2 and 30Cr1Mo1V heat-resistant steel by multipass welding at 783 K (510°C) under different stresses (260 to 420 MPa) was researched. The fitted creep rupture exponent is 14.53, and the 10,000 h extrapolating strength values predicted by the power law and Larson-Miller parameter show good agreement with experimental data. The samples exhibit a ductile fracture character and fracture in the weld fusion zone, which has a highly heterogeneous microstructure and grains with different morphologies and sizes and an obvious softening. There exist a decrease in the dislocation and precipitate density and an increase in the subgrain size in the weld metal after creep. The rupture is a transgranular fracture characterized by dimples as a result of microvoid coalescence. Laves phases along with copper-rich precipitates are observed in the vicinity of fracture surface, which creates a stress concentration that can cause transgranular fracture initiation.
doi_str_mv 10.1155/2021/1143989
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The fitted creep rupture exponent is 14.53, and the 10,000 h extrapolating strength values predicted by the power law and Larson-Miller parameter show good agreement with experimental data. The samples exhibit a ductile fracture character and fracture in the weld fusion zone, which has a highly heterogeneous microstructure and grains with different morphologies and sizes and an obvious softening. There exist a decrease in the dislocation and precipitate density and an increase in the subgrain size in the weld metal after creep. The rupture is a transgranular fracture characterized by dimples as a result of microvoid coalescence. 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The fitted creep rupture exponent is 14.53, and the 10,000 h extrapolating strength values predicted by the power law and Larson-Miller parameter show good agreement with experimental data. The samples exhibit a ductile fracture character and fracture in the weld fusion zone, which has a highly heterogeneous microstructure and grains with different morphologies and sizes and an obvious softening. There exist a decrease in the dislocation and precipitate density and an increase in the subgrain size in the weld metal after creep. The rupture is a transgranular fracture characterized by dimples as a result of microvoid coalescence. 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source Wiley Online Library Open Access; Publicly Available Content Database
subjects Coalescing
Crack initiation
Creep (materials)
Creep tests
Dimpling
Dislocation density
Ductile fracture
Ductility
Fracture mechanics
Fracture surfaces
Heat resistant steels
High temperature
Laves phase
Metals
Morphology
Precipitates
Rupture
Scanning electron microscopy
Steel
Stress concentration
Transgranular fracture
Weld metal
Weldments
title Creep Rupture Behavior in Dissimilar Weldment between FB2 and 30Cr1Mo1V Heat-Resistant Steel
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