Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wire
The elastic limit is a critical parameter in spring design， which has a significant impact on the spring characteristic. The influence of cold drawing on the strength， elastic limit， elastic after-effect， and microstructure of 07Cr17Ni7Al ultrafine wire with a diameter of 0.3 mm for valve springs is...
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Journal of Materials Engineering
2025-03-01
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| Series: | Cailiao gongcheng |
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| Online Access: | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000785 |
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| author | HE Qinsheng WANG Jianqiao ZHAO Zhen LI Fang ZHANG Shiqing WANG Hong ZOU Xingzheng TANG Yuanshou HUANG Min LI Jing |
| author_facet | HE Qinsheng WANG Jianqiao ZHAO Zhen LI Fang ZHANG Shiqing WANG Hong ZOU Xingzheng TANG Yuanshou HUANG Min LI Jing |
| author_sort | HE Qinsheng |
| collection | DOAJ |
| description | The elastic limit is a critical parameter in spring design， which has a significant impact on the spring characteristic. The influence of cold drawing on the strength， elastic limit， elastic after-effect， and microstructure of 07Cr17Ni7Al ultrafine wire with a diameter of 0.3 mm for valve springs is investigated using room temperature tensile tests， single arm bending method， optical microscope（OM）， X-ray diffraction（XRD） and scanning electron microscope（SEM）. Different mathematical models are used to fit and analyze the deformation and martensite content， deformation-elastic limit， and stress-elastic after-effect. The results show that the solid solution 07Cr17Ni7Al wire is composed of austenite and a small amount of ferrite. Cold drawing transforms austenite into martensite， the content of deformation-induced martensite （DIM） increases with increasing deformation. The relationship between DIM content and cold-drawn equivalent strain （η） conforms to the Olson-Cohen model. When η reaches 1.64， the DIM content is about 92%， and the DIM reaches saturation. The tensile strength of wire exhibits a linear relationship with η， and the larger the deformation， the higher the tensile strength. The relationship between the elastic limit and the η follows an “S” shaped curve and conforms to the DoseResp model. The elastic limit increases with increasing deformation. When the η reaches 1.64 or more， the elastic limit tends to be gentle. The elastic after-effect increases with increasing stress， which conforms to the PWL2 model. There exists a “critical stress for elastic after-effect”. When the stress exceeds this critical value， the rate of elastic after-effect increases by 2-11 times with increasing stress. When the η is 1.64-2.41， the 07Cr17Ni7Al wire has good mechanical and elastic properties. |
| format | Article |
| id | doaj-art-2b7039df94704b39b47aff3adc8d7a4b |
| institution | DOAJ |
| issn | 1001-4381 |
| language | zho |
| publishDate | 2025-03-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj-art-2b7039df94704b39b47aff3adc8d7a4b2025-08-20T03:17:32ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812025-03-01533839410.11868/j.issn.1001-4381.2023.0007851001-4381（2025）03-0083-12Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wireHE Qinsheng0WANG Jianqiao1ZHAO Zhen2LI Fang3ZHANG Shiqing4WANG Hong5ZOU Xingzheng6TANG Yuanshou7HUANG Min8LI Jing9Department of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaDepartment of Functional Materials and Components，Chongqing Materials Research Institute Co.，Ltd.，Chongqing 400707，ChinaCollege of Materials Sciences and Engineering，Chongqing School，University of Chinese Academy of Sciences，Chongqing 400714， ChinaThe elastic limit is a critical parameter in spring design， which has a significant impact on the spring characteristic. The influence of cold drawing on the strength， elastic limit， elastic after-effect， and microstructure of 07Cr17Ni7Al ultrafine wire with a diameter of 0.3 mm for valve springs is investigated using room temperature tensile tests， single arm bending method， optical microscope（OM）， X-ray diffraction（XRD） and scanning electron microscope（SEM）. Different mathematical models are used to fit and analyze the deformation and martensite content， deformation-elastic limit， and stress-elastic after-effect. The results show that the solid solution 07Cr17Ni7Al wire is composed of austenite and a small amount of ferrite. Cold drawing transforms austenite into martensite， the content of deformation-induced martensite （DIM） increases with increasing deformation. The relationship between DIM content and cold-drawn equivalent strain （η） conforms to the Olson-Cohen model. When η reaches 1.64， the DIM content is about 92%， and the DIM reaches saturation. The tensile strength of wire exhibits a linear relationship with η， and the larger the deformation， the higher the tensile strength. The relationship between the elastic limit and the η follows an “S” shaped curve and conforms to the DoseResp model. The elastic limit increases with increasing deformation. When the η reaches 1.64 or more， the elastic limit tends to be gentle. The elastic after-effect increases with increasing stress， which conforms to the PWL2 model. There exists a “critical stress for elastic after-effect”. When the stress exceeds this critical value， the rate of elastic after-effect increases by 2-11 times with increasing stress. When the η is 1.64-2.41， the 07Cr17Ni7Al wire has good mechanical and elastic properties.https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000785stainless steeldeformation-induced martensiteelastic limitelastic after-effectmechanical propertyultrafine wirecold drawing |
| spellingShingle | HE Qinsheng WANG Jianqiao ZHAO Zhen LI Fang ZHANG Shiqing WANG Hong ZOU Xingzheng TANG Yuanshou HUANG Min LI Jing Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wire Cailiao gongcheng stainless steel deformation-induced martensite elastic limit elastic after-effect mechanical property ultrafine wire cold drawing |
| title | Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wire |
| title_full | Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wire |
| title_fullStr | Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wire |
| title_full_unstemmed | Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wire |
| title_short | Evolution of microstructure and properties of cold-drawn 07Cr17Ni7Al ultrafine wire |
| title_sort | evolution of microstructure and properties of cold drawn 07cr17ni7al ultrafine wire |
| topic | stainless steel deformation-induced martensite elastic limit elastic after-effect mechanical property ultrafine wire cold drawing |
| url | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000785 |
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