The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation
To enhance the mechanical properties of M50 bearing steel, particularly its impact toughness, a novel electroshock treatment (EST) process was proposed, and the changes in its microstructure were analyzed in detail in this study. The results indicate that when the EST time is 100 ms, EST can enhance...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-08-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525007877 |
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| author | Long Chen Yanli Song Kai Wu Junhao Hu Lin Hua Jue Lu |
| author_facet | Long Chen Yanli Song Kai Wu Junhao Hu Lin Hua Jue Lu |
| author_sort | Long Chen |
| collection | DOAJ |
| description | To enhance the mechanical properties of M50 bearing steel, particularly its impact toughness, a novel electroshock treatment (EST) process was proposed, and the changes in its microstructure were analyzed in detail in this study. The results indicate that when the EST time is 100 ms, EST can enhance the impact toughness of M50 by approximately 55.63 % while maintaining the tensile strength essentially unchanged. Quasi-in-situ microstructural observations reveal that EST effectively refines the microstructure, significantly reduces texture intensity, homogenizes the distribution of geometrically necessary dislocations (GNDs), and alleviates stress concentration. X-ray diffraction (XRD) results confirm that EST can reduce the density of static stored dislocations (SSDs) and adjust the ratio of edge dislocations to screw dislocations within milliseconds. Molecular dynamics atomic simulations further indicate that EST promotes local atomic rearrangement within the material and delays void nucleation during the impact process, thereby enhancing the material’s impact toughness. |
| format | Article |
| id | doaj-art-7c2027c418fe4885a42b3be2c86d7f47 |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-7c2027c418fe4885a42b3be2c86d7f472025-08-20T03:27:25ZengElsevierMaterials & Design0264-12752025-08-0125611436710.1016/j.matdes.2025.114367The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulationLong Chen0Yanli Song1Kai Wu2Junhao Hu3Lin Hua4Jue Lu5Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, ChinaHubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China; Corresponding author at: at: Wuhan University of Technology, No. 122 Luoshi Road, Hongshan District, Wuhan, China.Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, ChinaHubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Light Superalloys, Wuhan University of Technology, Luoshi Road No. 122, Wuhan 430070, ChinaHubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, ChinaTo enhance the mechanical properties of M50 bearing steel, particularly its impact toughness, a novel electroshock treatment (EST) process was proposed, and the changes in its microstructure were analyzed in detail in this study. The results indicate that when the EST time is 100 ms, EST can enhance the impact toughness of M50 by approximately 55.63 % while maintaining the tensile strength essentially unchanged. Quasi-in-situ microstructural observations reveal that EST effectively refines the microstructure, significantly reduces texture intensity, homogenizes the distribution of geometrically necessary dislocations (GNDs), and alleviates stress concentration. X-ray diffraction (XRD) results confirm that EST can reduce the density of static stored dislocations (SSDs) and adjust the ratio of edge dislocations to screw dislocations within milliseconds. Molecular dynamics atomic simulations further indicate that EST promotes local atomic rearrangement within the material and delays void nucleation during the impact process, thereby enhancing the material’s impact toughness.http://www.sciencedirect.com/science/article/pii/S0264127525007877M50 steelElectroshock treatmentImpact toughnessMolecular dynamics simulationDislocation |
| spellingShingle | Long Chen Yanli Song Kai Wu Junhao Hu Lin Hua Jue Lu The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation Materials & Design M50 steel Electroshock treatment Impact toughness Molecular dynamics simulation Dislocation |
| title | The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation |
| title_full | The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation |
| title_fullStr | The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation |
| title_full_unstemmed | The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation |
| title_short | The effect mechanism of microstructure and impact toughness on M50 bearing steel under electroshock treatment: Experiments and atomic simulation |
| title_sort | effect mechanism of microstructure and impact toughness on m50 bearing steel under electroshock treatment experiments and atomic simulation |
| topic | M50 steel Electroshock treatment Impact toughness Molecular dynamics simulation Dislocation |
| url | http://www.sciencedirect.com/science/article/pii/S0264127525007877 |
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