Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tension
Combined with digital image correlation （DIC）， infrared thermal imaging （IRT）， electron backscatter diffraction （EBSD）， and microhardness distribution， the plastic instability behavior of medium-Mn steel processed by inter-critical quenching during uniaxial tension was analyzed. The results show tha...
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| Format: | Article |
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Journal of Materials Engineering
2024-12-01
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| Series: | Cailiao gongcheng |
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| Online Access: | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000293 |
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| author | LIU Junjie HUANG Xingmin YAO Xin ZHAO Junwen ZHANG Juan YU Daiyao MAO Peining |
| author_facet | LIU Junjie HUANG Xingmin YAO Xin ZHAO Junwen ZHANG Juan YU Daiyao MAO Peining |
| author_sort | LIU Junjie |
| collection | DOAJ |
| description | Combined with digital image correlation （DIC）， infrared thermal imaging （IRT）， electron backscatter diffraction （EBSD）， and microhardness distribution， the plastic instability behavior of medium-Mn steel processed by inter-critical quenching during uniaxial tension was analyzed. The results show that the strain-induced martensite transformation of experimental steel mainly occurs in the early stage of uniaxial tension. The Portevin-Le Chatelier（PLC）bands are obviously formed and propagated during this process， accompanied by thermal fluctuations. Moreover， the type of the PLC bands has transitioned from type A to type B and then to type A. The PLC bands are formed by the interaction between dislocation multiplication and interstitial solute atoms， i.e.， dynamic strain aging （DSA）. In the early stage of deformation， the dislocation will preferentially move to the low-density dislocation area， i.e.， propagate unidirectionally along the axis （the type A band）. Then， in the middle stage， the dislocation multiplication and initial interaction leads to the jumping （type B） PLC band formation. Finally， dislocation density and interactions increase in the later stage of deformation， leading to the formation of the type A PLC band again. |
| format | Article |
| id | doaj-art-2aed87a6a05a4e5fb0a31f80b2f3d78b |
| institution | Kabale University |
| issn | 1001-4381 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj-art-2aed87a6a05a4e5fb0a31f80b2f3d78b2024-12-20T05:49:37ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812024-12-01521213414210.11868/j.issn.1001-4381.2022.0002931001-4381（2024）12-0134-09Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tensionLIU Junjie0HUANG Xingmin1YAO Xin2ZHAO Junwen3ZHANG Juan4YU Daiyao5MAO Peining6School of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，ChinaSchool of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，ChinaSchool of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，ChinaSchool of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，ChinaSchool of Mechanics and Aerospace Engineering，Southwest Jiaotong University，Chengdu 610031，ChinaSchool of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，ChinaSchool of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，ChinaCombined with digital image correlation （DIC）， infrared thermal imaging （IRT）， electron backscatter diffraction （EBSD）， and microhardness distribution， the plastic instability behavior of medium-Mn steel processed by inter-critical quenching during uniaxial tension was analyzed. The results show that the strain-induced martensite transformation of experimental steel mainly occurs in the early stage of uniaxial tension. The Portevin-Le Chatelier（PLC）bands are obviously formed and propagated during this process， accompanied by thermal fluctuations. Moreover， the type of the PLC bands has transitioned from type A to type B and then to type A. The PLC bands are formed by the interaction between dislocation multiplication and interstitial solute atoms， i.e.， dynamic strain aging （DSA）. In the early stage of deformation， the dislocation will preferentially move to the low-density dislocation area， i.e.， propagate unidirectionally along the axis （the type A band）. Then， in the middle stage， the dislocation multiplication and initial interaction leads to the jumping （type B） PLC band formation. Finally， dislocation density and interactions increase in the later stage of deformation， leading to the formation of the type A PLC band again.https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000293hot rolled medium-mn steelplc bandplasticity instabilitydynamic strain agingstrain-induced martensite transformation |
| spellingShingle | LIU Junjie HUANG Xingmin YAO Xin ZHAO Junwen ZHANG Juan YU Daiyao MAO Peining Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tension Cailiao gongcheng hot rolled medium-mn steel plc band plasticity instability dynamic strain aging strain-induced martensite transformation |
| title | Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tension |
| title_full | Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tension |
| title_fullStr | Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tension |
| title_full_unstemmed | Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tension |
| title_short | Plasticity instability behavior of hot rolled medium-Mn steel after inter-critical quenching during uniaxial tension |
| title_sort | plasticity instability behavior of hot rolled medium mn steel after inter critical quenching during uniaxial tension |
| topic | hot rolled medium-mn steel plc band plasticity instability dynamic strain aging strain-induced martensite transformation |
| url | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000293 |
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