Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel
Precipitate phases provide precipitation strengthening effects but worsen fatigue properties. A Solid Solution-Forging-Austempering (SFA) process was presented aimed at breaking the trade-off between fatigue performance and hardness of Ti-containing wear-resistant bainitic steel, and the impressive...
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Elsevier
2025-01-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524009353 |
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| author | Sida Chen Zulai Li Quan Shan |
| author_facet | Sida Chen Zulai Li Quan Shan |
| author_sort | Sida Chen |
| collection | DOAJ |
| description | Precipitate phases provide precipitation strengthening effects but worsen fatigue properties. A Solid Solution-Forging-Austempering (SFA) process was presented aimed at breaking the trade-off between fatigue performance and hardness of Ti-containing wear-resistant bainitic steel, and the impressive strength-ductility balance of 26.16GPa% was achieved. The SFA process refined the primary TiC and introduced strain-induced TiC with a coherent interface with the matrix. During the cyclic forging process, the grain boundaries pinning effect by strain-induced TiC refined the prior austenite grains which led to a completer bainite transformation during the austempering process, thereby promoting the thinning of retained austenite (RA). The fatigue behavior dominated by RA morphology was delved. Results indicated that the uneven strain distribution inside blocky RA contributed to its uneven transformation to martensite, consequently promoting fatigue crack initiation at interfaces. Conversely, film-like RA exhibited a uniform strain distribution, resulting in a more uniform transformation to martensite. Consequently, film-like RA significantly enhanced the fatigue wear performance of bainitic steel. Since fatigue performance exhibited different dominance over wear performance under different wear conditions, the amount ratio of primary TiC to strain-induced TiC can be altered by adjusting the Ti addition to meet the requirements of fatigue performance under different wear conditions. |
| format | Article |
| id | doaj-art-fa8f904e26f14ca9b0960b93854465e7 |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Materials & Design |
| spelling | doaj-art-fa8f904e26f14ca9b0960b93854465e72025-01-09T06:12:25ZengElsevierMaterials & Design0264-12752025-01-01249113560Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steelSida Chen0Zulai Li1Quan Shan2Faculty of Materials Science and Engineering, Kunming University of Science and Technology, 253 Xuefu Road, 650093 Kunming, PR China; National & Local Joint Engineering Laboratory of Advanced Metal Solidification Forming and Equipment Technology, Kunming University of Science and Technology, 650093 Kunming, PR ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, 253 Xuefu Road, 650093 Kunming, PR China; National & Local Joint Engineering Laboratory of Advanced Metal Solidification Forming and Equipment Technology, Kunming University of Science and Technology, 650093 Kunming, PR China; Corresponding authors at: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, 253 Xuefu Road, 650093 Kunming, PR China (Z. Li).Faculty of Materials Science and Engineering, Kunming University of Science and Technology, 253 Xuefu Road, 650093 Kunming, PR China; National & Local Joint Engineering Laboratory of Advanced Metal Solidification Forming and Equipment Technology, Kunming University of Science and Technology, 650093 Kunming, PR China; Corresponding authors at: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, 253 Xuefu Road, 650093 Kunming, PR China (Z. Li).Precipitate phases provide precipitation strengthening effects but worsen fatigue properties. A Solid Solution-Forging-Austempering (SFA) process was presented aimed at breaking the trade-off between fatigue performance and hardness of Ti-containing wear-resistant bainitic steel, and the impressive strength-ductility balance of 26.16GPa% was achieved. The SFA process refined the primary TiC and introduced strain-induced TiC with a coherent interface with the matrix. During the cyclic forging process, the grain boundaries pinning effect by strain-induced TiC refined the prior austenite grains which led to a completer bainite transformation during the austempering process, thereby promoting the thinning of retained austenite (RA). The fatigue behavior dominated by RA morphology was delved. Results indicated that the uneven strain distribution inside blocky RA contributed to its uneven transformation to martensite, consequently promoting fatigue crack initiation at interfaces. Conversely, film-like RA exhibited a uniform strain distribution, resulting in a more uniform transformation to martensite. Consequently, film-like RA significantly enhanced the fatigue wear performance of bainitic steel. Since fatigue performance exhibited different dominance over wear performance under different wear conditions, the amount ratio of primary TiC to strain-induced TiC can be altered by adjusting the Ti addition to meet the requirements of fatigue performance under different wear conditions.http://www.sciencedirect.com/science/article/pii/S0264127524009353Strain-induced precipitationRetained austeniteImpact wearFatigue wearTRIP effectWear resistance steel |
| spellingShingle | Sida Chen Zulai Li Quan Shan Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel Materials & Design Strain-induced precipitation Retained austenite Impact wear Fatigue wear TRIP effect Wear resistance steel |
| title | Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel |
| title_full | Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel |
| title_fullStr | Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel |
| title_full_unstemmed | Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel |
| title_short | Achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel |
| title_sort | achieving precipitation strengthening and retained austenite thinning via strain induced precipitation to improve fatigue wear resistance of bainitic steel |
| topic | Strain-induced precipitation Retained austenite Impact wear Fatigue wear TRIP effect Wear resistance steel |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524009353 |
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