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Welding-induced yield strength heterogeneity in X100Q: Modelling and characterisation

Long, D.J.
; 
Devaney, R.J.
; 
Leen, Sean B.
; 
Barrett, Richard A.
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Publication Date
2021-09-14
Keywords
X100, HSLA steel, Catenary risers, Yield strength, Modelling, Precipitation kinetics, Welding
Type
Article
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Citation
Long, D. J., Devaney, R. J., Leen, S. B., & Barrett, R. A. (2021). Welding-induced yield strength heterogeneity in X100Q: Modelling and characterisation. Materials Today Communications, 29, 102784. doi:https://doi.org/10.1016/j.mtcomm.2021.102784
Abstract
Yield strength (YS) heterogeneity in X100Q high strength low alloy (HSLA) steel welded joints is a key factor which influences fatigue life performance. The effects of welding-induced microstructural changes are investigated using a mechanistic YS model, which enables understanding of the key strengthening mechanisms which give rise to YS heterogeneity in X100Q. The model is used to predict YS in parent metal, physically-simulated fine-grain heat-affected zone material, and inter-critical heat-affected zone material, incorporating cooling rate effects. The model successfully predicts the measured welding-induced YS heterogeneity, with high-angle boundary (HAB) and precipitate strengthening mechanisms as dominant factors.
Funder
Science Foundation Ireland
Publisher
Elsevier
Publisher DOI
10.1016/j.mtcomm.2021.102784
Rights
Attribution 4.0 International (CC BY 4.0)
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Collections
Mechanical Engineering (Scholarly Articles)