{"title":"Investigation of the history-dependent nonlinear micro-viscoplasticity behavior of dual-phase steel using crystal plasticity finite element method","authors":"Jaebong Jung , Ji Hoon Kim","doi":"10.1016/j.mechmat.2024.105202","DOIUrl":null,"url":null,"abstract":"<div><div>During tensile loading–unloading cycles, steels composed of different phases may exhibit history-dependent nonlinear micro-viscoplasticity behavior. To analyze the mechanism of the evolution of the elastic behavior, in this study, loading–unloading experiments were conducted for dual-phase steels, comprising martensite and ferrite, with a thickness of 1.1 mm and a tensile strength of 980 MPa. To investigate the complex elastic behavior at the microscale, a 3D representative volume element modeling the steel microstructure was generated and the elastic response was examined using the rate-dependent crystal plasticity finite element method. The differences of the plastic deformation in the ferritic and martensitic phases were analyzed. To describe the history-dependent nonlinear micro-viscoplasticity behavior for macroscopic simulations, a micro-viscoplasticity model was developed. The developed material model successfully captured the repeated loading–unloading behavior of DP980 steel.</div></div>","PeriodicalId":18296,"journal":{"name":"Mechanics of Materials","volume":"200 ","pages":"Article 105202"},"PeriodicalIF":3.4000,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics of Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167663624002941","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
During tensile loading–unloading cycles, steels composed of different phases may exhibit history-dependent nonlinear micro-viscoplasticity behavior. To analyze the mechanism of the evolution of the elastic behavior, in this study, loading–unloading experiments were conducted for dual-phase steels, comprising martensite and ferrite, with a thickness of 1.1 mm and a tensile strength of 980 MPa. To investigate the complex elastic behavior at the microscale, a 3D representative volume element modeling the steel microstructure was generated and the elastic response was examined using the rate-dependent crystal plasticity finite element method. The differences of the plastic deformation in the ferritic and martensitic phases were analyzed. To describe the history-dependent nonlinear micro-viscoplasticity behavior for macroscopic simulations, a micro-viscoplasticity model was developed. The developed material model successfully captured the repeated loading–unloading behavior of DP980 steel.
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Mechanics of Materials is a forum for original scientific research on the flow, fracture, and general constitutive behavior of geophysical, geotechnical and technological materials, with balanced coverage of advanced technological and natural materials, with balanced coverage of theoretical, experimental, and field investigations. Of special concern are macroscopic predictions based on microscopic models, identification of microscopic structures from limited overall macroscopic data, experimental and field results that lead to fundamental understanding of the behavior of materials, and coordinated experimental and analytical investigations that culminate in theories with predictive quality.
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