Searched for: author%3A%22Walters%2C+C.L.%22
(1 - 16 of 16)
document
Wong, W.J. (author), Walters, C.L. (author)
High-strength steel beams are known to have less plastic rotation capacity than beams with lower yield strengths. This has been related to the decreased strain-hardening ability of high-strength steels, and various rules and standards for steel structures stipulate maximum limits on the allowable yield-to-tensile strength ratio ((Formula...
journal article 2023
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Morete Barbosa Bertolo, V. (author), Jiang, Q. (author), Terol Sanchez, M. (author), Riemslag, A.C. (author), Walters, C.L. (author), Sietsma, J. (author), Popovich, V. (author)
High strength steels are widely used for structural applications, where a combination of excellent strength and ductile-to-brittle transition (DBT) properties are required. However, such a combination of high strength and toughness can be deteriorated in the heat affected zone (HAZ) after welding. This work aims to develop a relationship...
journal article 2023
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Jiang, Quanxin (author), Morete Barbosa Bertolo, V. (author), Pallaspuro, Sakari (author), Popovich, V. (author), Sietsma, J. (author), Walters, C.L. (author)
Multi-barrier cleavage models consider cleavage fracture which is characterized by a series of microscale events. One of the challenges for multi-barrier cleavage models is the strong variations of cleavage parameters across different types of steels. The source and magnitude of the variations have not been studied systematically. In the...
journal article 2023
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Jiang, Quanxin (author), Morete Barbosa Bertolo, V. (author), Popovich, V. (author), Sietsma, J. (author), Walters, C.L. (author)
Study of the cleavage behavior of heat treated S690 steel by a microstructure-based approach combined with finite element analysis is present in this paper. Cleavage simulations of steels subjected to heat treatments that cause grain refinement or simulate heat affected zones are performed, and are compared with experiments. It is found that...
journal article 2023
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Morete Barbosa Bertolo, V. (author), Jiang, Quanxin (author), Scholl, Sebastian (author), Petrov, R.H. (author), Hangen, Ude (author), Walters, C.L. (author), Sietsma, J. (author), Popovich, V. (author)
The through-thickness heterogeneous microstructure of thick-section high strength steels is responsible for the significant scatter of properties along the thickness. In this study, in order to identify the critical microstructural features in the fracture behaviour and allow for design optimisation and prediction of structural failure, the...
journal article 2022
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Jiang, Quanxin (author), Morete Barbosa Bertolo, V. (author), Popovich, V. (author), Sietsma, J. (author), Walters, C.L. (author)
Thick section S690 QT steel is modelled with a modified multibarrier model that is based on the weakest-link mechanism. Segregation bands are modelled as discrete layers which have different grain size, yield properties, and local fracture parameters from outside of the bands. The results show that embrittlement from segregation bands can...
journal article 2022
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Morete Barbosa Bertolo, V. (author), Jiang, Quanxin (author), Tiringer, U. (author), Walters, C.L. (author), Sietsma, J. (author), Popovich, V. (author)
For structural assessment and optimal design of thick-section high-strength steels in applications under harsh service conditions, it is essential to understand the cleavage fracture micromechanisms. In this study, we assess the effects of through-thickness microstructure of an 80-mm-thick quenched and tempered S690 high-strength steel, notch...
journal article 2022
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Maljaars, Johan (author), Rózsás, Árpád (author), Walters, C.L. (author), Slot, Henk (author)
The failure assessment line (FAL) describes the interaction between plastic failure and fracture of flawed steel components subjected to tension or bending. This paper quantifies the model uncertainty of the FAL as provided in the internationally used British Standard BS 7910:2019 by comparing the assessment with the actual failure load of 82...
journal article 2022
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Obers, Siemen F.P.M. (author), Overal, Jaap J. (author), Wong, W.J. (author), Walters, C.L. (author)
Application of high-strength steels in the maritime and offshore industry is currently limited by rules governing the ratio of the yield to tensile strength (the Y/T ratio). To better understand the physical basis for these rules, the nature and extent of the plastic stress/strain field in the vicinity of a stress concentration (a circular...
journal article 2022
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Boot, T. (author), Riemslag, A.C. (author), Reinton, T.E. (author), Liu, P. (author), Walters, C.L. (author), Popovich, V. (author)
This work discusses the design and demonstration of an in-situ test setup for testing pipeline steels in a high pressure gaseous hydrogen (H2) environment. A miniature hollow pipe-like tensile specimen was designed that acts as the gas containment volume during the test. Specific areas of the specimen can be forced to fracture by selective...
journal article 2021
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Sunnardianto, G.K. (author), Bokas, George (author), Hussein, A.H.A. (author), Walters, C.L. (author), Moultos, O. (author), Dey, P. (author)
A combined density functional theory and molecular dynamics approach is employed to study modifications of graphene at atomistic level for better H<sub>2</sub> storage. The study reveals H<sub>2</sub> desorption from hydrogenated defective graphene structure, V<sub>222</sub>, to be exothermic. H<sub>2</sub> adsorption and desorption processes...
journal article 2021
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Jiang, Quanxin (author), Morete Barbosa Bertolo, V. (author), Popovich, V. (author), Sietsma, J. (author), Walters, C.L. (author)
Macroscale cleavage fracture toughness of high strength steels is strongly related to the fracture of hard microstructural inclusions. Therefore, an accurate determination of the local stress on these inclusions based on the matrix stress is necessary for the statistical modelling of macroscale cleavage fracture. This paper presents...
journal article 2021
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Hussein, A.H.A. (author), Krom, Alfons H.M. (author), Dey, P. (author), Sunnardianto, G.K. (author), Moultos, O. (author), Walters, C.L. (author)
In this study, we investigate the effect of the heterogeneous micromechanical stress fields resulting from the grain-scale anisotropy on the redistribution of hydrogen using a diffusion coupled crystal plasticity model. A representative volume element with periodic boundary conditions was used to model a synthetic microstructure. The effect...
journal article 2021
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Walters, C.L. (author), Coppejans, Okko J. (author), Hoogeland, Martijn (author)
In a prior project, TNO has presented a low-cost way of finding fracture toughness of base materials for cleavage fracture. That method features a small-scale CTOD specimen, combined with simplified sensors, less fatigue pre-cracking, faster testing, and no need for a temperature chamber. This method has been extended to welds by considering...
conference paper 2021
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Boot, T. (author), Riemslag, A.C. (author), Reinton, T.E. (author), Liu, Ping (author), Walters, C.L. (author), Popovich, V. (author)
With fossil fuels being phased out and growing global interest in a hydrogen economy, there is demand for re-purposing existing pipelines for transportation of hydrogen gas. However, hydrogen embrittlement (HE) can limit pipeline steel’s performance. In this study, the effect of hydrogen on the mechanical properties of an X60 base metal ...
conference paper 2021
document
Walters, C.L. (author)
journal article 2018
Searched for: author%3A%22Walters%2C+C.L.%22
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