Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening
The study investigated the microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening. Observation of microstructure, measurement of microhardness, residual stress and FWHM (full width at half maximum), impact toughness and w...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422013813 |
| _version_ | 1828374605741424640 |
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| author | Aixin Feng Yacheng Wei Bingjie Liu Chunlun Chen Xiaoming Pan Jianjun Xue |
| author_facet | Aixin Feng Yacheng Wei Bingjie Liu Chunlun Chen Xiaoming Pan Jianjun Xue |
| author_sort | Aixin Feng |
| collection | DOAJ |
| description | The study investigated the microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening. Observation of microstructure, measurement of microhardness, residual stress and FWHM (full width at half maximum), impact toughness and wear tests were carried out on untreated, laser quenched, laser quench-laser shock peened high-chromium cast iron specimens. The research results showed that the laser shock peening will not produce new phases in high-chromium cast iron, and can further promote the transformation of retained austenite into martensite. The grains inside the laser quench-laser shock peened sample were obviously refined, and the carbides were uniformly dispersed. The laser quench-laser shock peened specimen produced large residual compressive stress and FWHM value on the surface, reaching −432.49 MPa and 2.124°, respectively. The problem of residual stress difference between the hardened zone and the transition zone caused by laser quenching was eliminated, and the tensile stress was all converted into compressive stress, which further increases the dislocation density and improves the micro-hardness. The impact toughness value of laser quench-laser shock peened specimen was 4.43 J/cm2, which was 16.27% higher than that of the untreated sample. The friction coefficient and wear rate were significantly reduced, and the wear scar was shallow and narrow, showing weak abrasive wear and oxidative wear, the impact toughness and wear resistance of high-chromium cast iron were improved. The results obtained from this study could be used as reference in future research and applications of laser strengthened high-chromium cast iron. |
| first_indexed | 2024-04-14T07:35:26Z |
| format | Article |
| id | doaj.art-005cc13e8ff14d6fb54c2aff78372e44 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-14T07:35:26Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-005cc13e8ff14d6fb54c2aff78372e442022-12-22T02:05:42ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012043424355Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peeningAixin Feng0Yacheng Wei1Bingjie Liu2Chunlun Chen3Xiaoming Pan4Jianjun Xue5College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China; Ruian Graduate College, Wenzhou University, Ruian, Zhejiang, 325200, China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou, 325035, China; Corresponding author.College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China; Ruian Graduate College, Wenzhou University, Ruian, Zhejiang, 325200, China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou, 325035, ChinaCollege of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China; Ruian Graduate College, Wenzhou University, Ruian, Zhejiang, 325200, China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou, 325035, China; Corresponding author.College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China; Ruian Graduate College, Wenzhou University, Ruian, Zhejiang, 325200, China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou, 325035, ChinaCollege of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, ChinaZhejiang Y-Hu Auto Parts Co., Ltd., Wenzhou, Zhejiang, 325035, ChinaThe study investigated the microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening. Observation of microstructure, measurement of microhardness, residual stress and FWHM (full width at half maximum), impact toughness and wear tests were carried out on untreated, laser quenched, laser quench-laser shock peened high-chromium cast iron specimens. The research results showed that the laser shock peening will not produce new phases in high-chromium cast iron, and can further promote the transformation of retained austenite into martensite. The grains inside the laser quench-laser shock peened sample were obviously refined, and the carbides were uniformly dispersed. The laser quench-laser shock peened specimen produced large residual compressive stress and FWHM value on the surface, reaching −432.49 MPa and 2.124°, respectively. The problem of residual stress difference between the hardened zone and the transition zone caused by laser quenching was eliminated, and the tensile stress was all converted into compressive stress, which further increases the dislocation density and improves the micro-hardness. The impact toughness value of laser quench-laser shock peened specimen was 4.43 J/cm2, which was 16.27% higher than that of the untreated sample. The friction coefficient and wear rate were significantly reduced, and the wear scar was shallow and narrow, showing weak abrasive wear and oxidative wear, the impact toughness and wear resistance of high-chromium cast iron were improved. The results obtained from this study could be used as reference in future research and applications of laser strengthened high-chromium cast iron.http://www.sciencedirect.com/science/article/pii/S2238785422013813High-chromium cast ironLaser quenchingLaser shock peeningMicrostructureImpact toughnessWear performance |
| spellingShingle | Aixin Feng Yacheng Wei Bingjie Liu Chunlun Chen Xiaoming Pan Jianjun Xue Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening Journal of Materials Research and Technology High-chromium cast iron Laser quenching Laser shock peening Microstructure Impact toughness Wear performance |
| title | Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening |
| title_full | Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening |
| title_fullStr | Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening |
| title_full_unstemmed | Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening |
| title_short | Microstructure and mechanical properties of composite strengthened high-chromium cast iron by laser quenching and laser shock peening |
| title_sort | microstructure and mechanical properties of composite strengthened high chromium cast iron by laser quenching and laser shock peening |
| topic | High-chromium cast iron Laser quenching Laser shock peening Microstructure Impact toughness Wear performance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422013813 |
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