Plastic deformation and damage induced by fatigue in TWIP steels

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:628

Article

Roa, J. J.^1,2  Fargas, G.^1,2  Calvo, J.^1,3  Jimenez-Pique, E.^1,2  Mateo, A.¹ 

[1] Univ Politecn Cataluna, Dept Ciencia Mat & Engn Met Lurg, E-08028 Barcelona, Spain

[2] Univ Politecn Cataluna, CRnE, E-08028 Barcelona, Spain

[3] Fundacio CTM Ctr Tecnol, Manresa 08243, Spain

关键词: Twinning Induced Plasticity;    High cycle fatigue;    Fracture mechanisms;    Deformation mechanisms;   

DOI  :  10.1016/j.msea.2015.01.043

来源: Elsevier

【 摘 要 】

Twinning Induced Plasticity steels exhibit a high strain hardening rate which translates into a remarkable combination of ductility and strength. A thorough experimental approach was performed by advanced characterization techniques to study the deformation mechanisms developed under high cycle fatigue conditions. Results clearly lay out that the cumulative strain damage leads to strengthening but also induces micro-cracks at the intersection of twin boundaries which promote fracture. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free