Pub Date : 2026-01-27DOI: 10.1016/j.jmst.2026.01.029
Bin Wang, Jiawei Liu, Zhiwei Qin, Jingkuan Wang, Zhijie Ding, Jinkai Wang, Chunbo Zhang, Zhijie Li, Honggang Dong, Peng Li
Structural integrity of nuclear power plants under extreme conditions imposes stringent demands on the dissimilar pipe connection. Herein, a cumulative strain-induced gradient heterostructure strengthening strategy based on surface mechanical rolling (SMR) was proposed to synchronously enhance the mechanical properties and corrosion resistance of IN690/316LN dissimilar joints. A pre-engineered gradient dislocation network was implemented, significantly mitigating the initiation and propagation of cracks through suppressing strain localization. The gradient dislocation prefabricated by cumulative strain facilitates the formation of gradient-distributed domains, which are characterized by severe strain gradients and high-density geometrically necessary dislocations along the depth direction, further promoting a hetero-deformation-induced (HDI) hardening effect, and the effective depth exceeds 360 μm. The back stress during tensile deformation increases significantly following SMR, with a maximum enhancement of 56.1 MPa, thereby facilitating the strength-ductility synergy. The severe plastic deformation induced by SMR triggers martensitic transformation, introducing deformed twins and high-density stacking faults, synergistically enhancing mechanical properties through defect interaction and HDI hardening. Compared with as-welded joints, the surface hardness and elastic modulus increased by 35.15% and 91.4%, and the wear resistance improved by 105.3%, while the tensile strength and elongation rose by 39.71 MPa and 5.2%. Additionally, the corrosion resistance was substantially enhanced, with passivation film thickness increasing by 84.2%. The findings provide a technical foundation for high-performance manufacturing in nuclear power.
{"title":"Cumulative strain-induced gradient heterostructure for synchronously boosting mechanical properties and corrosion resistance","authors":"Bin Wang, Jiawei Liu, Zhiwei Qin, Jingkuan Wang, Zhijie Ding, Jinkai Wang, Chunbo Zhang, Zhijie Li, Honggang Dong, Peng Li","doi":"10.1016/j.jmst.2026.01.029","DOIUrl":"https://doi.org/10.1016/j.jmst.2026.01.029","url":null,"abstract":"Structural integrity of nuclear power plants under extreme conditions imposes stringent demands on the dissimilar pipe connection. Herein, a cumulative strain-induced gradient heterostructure strengthening strategy based on surface mechanical rolling (SMR) was proposed to synchronously enhance the mechanical properties and corrosion resistance of IN690/316LN dissimilar joints. A pre-engineered gradient dislocation network was implemented, significantly mitigating the initiation and propagation of cracks through suppressing strain localization. The gradient dislocation prefabricated by cumulative strain facilitates the formation of gradient-distributed domains, which are characterized by severe strain gradients and high-density geometrically necessary dislocations along the depth direction, further promoting a hetero-deformation-induced (HDI) hardening effect, and the effective depth exceeds 360 μm. The back stress during tensile deformation increases significantly following SMR, with a maximum enhancement of 56.1 MPa, thereby facilitating the strength-ductility synergy. The severe plastic deformation induced by SMR triggers martensitic transformation, introducing deformed twins and high-density stacking faults, synergistically enhancing mechanical properties through defect interaction and HDI hardening. Compared with as-welded joints, the surface hardness and elastic modulus increased by 35.15% and 91.4%, and the wear resistance improved by 105.3%, while the tensile strength and elongation rose by 39.71 MPa and 5.2%. Additionally, the corrosion resistance was substantially enhanced, with passivation film thickness increasing by 84.2%. The findings provide a technical foundation for high-performance manufacturing in nuclear power.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"40 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146056094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.jmst.2026.01.028
Yeonghun Yun, Min Ju Jeong, Hanbyeol Cho, Dong Hyun Kim, Won Chang Choi, Jina Jung, Sunwoo Kim, Ji-Sang Park, Jun Hong Noh, Sangwook Lee
{"title":"Charge-transport-layer-free 2D/3D perovskite photodetector with high performance and stability","authors":"Yeonghun Yun, Min Ju Jeong, Hanbyeol Cho, Dong Hyun Kim, Won Chang Choi, Jina Jung, Sunwoo Kim, Ji-Sang Park, Jun Hong Noh, Sangwook Lee","doi":"10.1016/j.jmst.2026.01.028","DOIUrl":"https://doi.org/10.1016/j.jmst.2026.01.028","url":null,"abstract":"","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.jmst.2026.01.027
Przemysław Klupś, Benjamin M. Jenkins, Paul Chekhonin, James O. Douglas, Megan Carter, Yuanbo Tony Tang, Jonathan M. Hyde, Nick Riddle, Paul A.J. Bagot, Michael P. Moody
{"title":"On the solute segregation to grain boundaries in SA508 steel","authors":"Przemysław Klupś, Benjamin M. Jenkins, Paul Chekhonin, James O. Douglas, Megan Carter, Yuanbo Tony Tang, Jonathan M. Hyde, Nick Riddle, Paul A.J. Bagot, Michael P. Moody","doi":"10.1016/j.jmst.2026.01.027","DOIUrl":"https://doi.org/10.1016/j.jmst.2026.01.027","url":null,"abstract":"","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"28 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.jmst.2026.01.024
Laura Lain Rodriguez, Benjamin M. Jenkins, Shah Alam Limon, Chiara Tarantini, Eric Hellstrom, Fumitake Kametani, Michael P. Moody, Chris R.M. Grovenor, Susie Speller
{"title":"Revealing the complex chemistry of grain boundaries in K-doped BaFe2As2 with atom probe tomography","authors":"Laura Lain Rodriguez, Benjamin M. Jenkins, Shah Alam Limon, Chiara Tarantini, Eric Hellstrom, Fumitake Kametani, Michael P. Moody, Chris R.M. Grovenor, Susie Speller","doi":"10.1016/j.jmst.2026.01.024","DOIUrl":"https://doi.org/10.1016/j.jmst.2026.01.024","url":null,"abstract":"","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"37 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146032916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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