The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel
The strain-induced martensitic transformation (α′-martensite) and residual stress (RS) introduction in the gradient nanostructured (GNS) austenitic stainless steel have been extensively reported in the last three decades, however, their correlation is still unclear. Here, the XRD, EBSD, ECCI and TEM...
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| Format: | Article |
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Elsevier
2024-02-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524000959 |
| _version_ | 1797301609561063424 |
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| author | Yinsheng He Hongyu Zhou Wei Liu Fangmiao Duan Keesam Shin Yuchen Zhao Wenyue Zheng |
| author_facet | Yinsheng He Hongyu Zhou Wei Liu Fangmiao Duan Keesam Shin Yuchen Zhao Wenyue Zheng |
| author_sort | Yinsheng He |
| collection | DOAJ |
| description | The strain-induced martensitic transformation (α′-martensite) and residual stress (RS) introduction in the gradient nanostructured (GNS) austenitic stainless steel have been extensively reported in the last three decades, however, their correlation is still unclear. Here, the XRD, EBSD, ECCI and TEM were used to study the RS distribution and martensite behaviors in a GNS SS304 fabricated by ultrasonic surface nanocrystallization modification. We found the non-linear relationship between the magnitude of RS and the fraction of α′-martensite due to the role of α′-martensite in the development of type II intergranular RS. The maximum compressive RS of about 1,244 MPa was obtained as the γ-austenite and α′-martensite phases were each at approximately 50 %. Otherwise, the RS would decrease with the second phase fraction. The developed maximum compressive RS arises from the α′-martensite that formed directly from the γ-austenite. By contrast, the RS from other deformation structures, i.e., α′-martensite produced by γ → ε → α′, ε-martensite, nanotwin and dislocations, is relatively low. The current study classified the correlation of RS and the role of martensite for the first time, which may inspire new approaches for improving the fatigue properties of materials by controlling the phase fraction. |
| first_indexed | 2024-03-07T23:25:02Z |
| format | Article |
| id | doaj.art-ae5f0748e5a64d8da58e155fe3424e58 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-07T23:25:02Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-ae5f0748e5a64d8da58e155fe3424e582024-02-21T05:24:19ZengElsevierMaterials & Design0264-12752024-02-01238112723The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steelYinsheng He0Hongyu Zhou1Wei Liu2Fangmiao Duan3Keesam Shin4Yuchen Zhao5Wenyue Zheng6National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China; Corresponding authors.National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaChina Heavy-Duty Gas Turbine Technology Co., Ltd., Beijing 100016, ChinaChina Heavy-Duty Gas Turbine Technology Co., Ltd., Beijing 100016, ChinaSchool Materials Science and Engineering, Changwon National University, Changwon 51140, KoreaChina Heavy-Duty Gas Turbine Technology Co., Ltd., Beijing 100016, China; Corresponding authors.National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China; Corresponding authors.The strain-induced martensitic transformation (α′-martensite) and residual stress (RS) introduction in the gradient nanostructured (GNS) austenitic stainless steel have been extensively reported in the last three decades, however, their correlation is still unclear. Here, the XRD, EBSD, ECCI and TEM were used to study the RS distribution and martensite behaviors in a GNS SS304 fabricated by ultrasonic surface nanocrystallization modification. We found the non-linear relationship between the magnitude of RS and the fraction of α′-martensite due to the role of α′-martensite in the development of type II intergranular RS. The maximum compressive RS of about 1,244 MPa was obtained as the γ-austenite and α′-martensite phases were each at approximately 50 %. Otherwise, the RS would decrease with the second phase fraction. The developed maximum compressive RS arises from the α′-martensite that formed directly from the γ-austenite. By contrast, the RS from other deformation structures, i.e., α′-martensite produced by γ → ε → α′, ε-martensite, nanotwin and dislocations, is relatively low. The current study classified the correlation of RS and the role of martensite for the first time, which may inspire new approaches for improving the fatigue properties of materials by controlling the phase fraction.http://www.sciencedirect.com/science/article/pii/S0264127524000959Residual stressStrain-induced martensitic transformationAustenitic stainless steelSevere plastic deformationXRDTEM |
| spellingShingle | Yinsheng He Hongyu Zhou Wei Liu Fangmiao Duan Keesam Shin Yuchen Zhao Wenyue Zheng The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel Materials & Design Residual stress Strain-induced martensitic transformation Austenitic stainless steel Severe plastic deformation XRD TEM |
| title | The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel |
| title_full | The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel |
| title_fullStr | The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel |
| title_full_unstemmed | The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel |
| title_short | The role of α′-martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel |
| title_sort | role of α martensite on the variation of compressive residual stress in a gradient nanostructured austenitic stainless steel |
| topic | Residual stress Strain-induced martensitic transformation Austenitic stainless steel Severe plastic deformation XRD TEM |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524000959 |
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