Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser Melting
Thermal fatigue is the main failure mode for chromium hot-work steels. In this study, pre-alloyed chromium hot-work steel powders with three different Cr, Mo, and V addition levels (low content (LH), medium content (MH), and high content (HH)) were used for selective laser melting (SLM). The microst...
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MDPI AG
2022-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/5/735 |
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| author | Mei Wang Bo You Yan Wu Bo Liang Xianhui Gao Wei Li Qingsong Wei |
| author_facet | Mei Wang Bo You Yan Wu Bo Liang Xianhui Gao Wei Li Qingsong Wei |
| author_sort | Mei Wang |
| collection | DOAJ |
| description | Thermal fatigue is the main failure mode for chromium hot-work steels. In this study, pre-alloyed chromium hot-work steel powders with three different Cr, Mo, and V addition levels (low content (LH), medium content (MH), and high content (HH)) were used for selective laser melting (SLM). The microstructure and thermal fatigue properties of these SLM-processed materials were investigated. After thermal fatigue tests, LH possessed the lowest hardness (approximately 573 HV<sub>5</sub>) and longest crack length, MH possessed the highest hardness (approximately 688 HV<sub>5</sub>) and HH (with the hardness of approximately 675 HV<sub>5</sub>) possessed the shortest crack length. It can be concluded that the increase of V content in MH is the main reason for the refined grains which result in an enhanced hardness and thermal fatigue resistance compared to LH. The further increase of the Cr and Mo content in HH leads to the grain coarsening and hardness decreasing, which is supposed to degrade the thermal fatigue resistant properties according to the conventional theory. However, HH exhibited an enhanced thermal fatigue resistance compared to MH. That is because the higher stored energy in MH deteriorated its thermal fatigue resistance compared to HH. |
| first_indexed | 2024-03-10T03:26:23Z |
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| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T03:26:23Z |
| publishDate | 2022-04-01 |
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| spelling | doaj.art-c671dff7dfe5471a8a6f938a1782a0d12023-11-23T12:08:32ZengMDPI AGMetals2075-47012022-04-0112573510.3390/met12050735Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser MeltingMei Wang0Bo You1Yan Wu2Bo Liang3Xianhui Gao4Wei Li5Qingsong Wei6Rongcheng College, Harbin University of Science and Technology, Rongcheng 264300, ChinaSchool of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin 150080, ChinaInstitute of Advanced Integration Technology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, ChinaRongcheng College, Harbin University of Science and Technology, Rongcheng 264300, ChinaSchool of Materials Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Materials Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Materials Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaThermal fatigue is the main failure mode for chromium hot-work steels. In this study, pre-alloyed chromium hot-work steel powders with three different Cr, Mo, and V addition levels (low content (LH), medium content (MH), and high content (HH)) were used for selective laser melting (SLM). The microstructure and thermal fatigue properties of these SLM-processed materials were investigated. After thermal fatigue tests, LH possessed the lowest hardness (approximately 573 HV<sub>5</sub>) and longest crack length, MH possessed the highest hardness (approximately 688 HV<sub>5</sub>) and HH (with the hardness of approximately 675 HV<sub>5</sub>) possessed the shortest crack length. It can be concluded that the increase of V content in MH is the main reason for the refined grains which result in an enhanced hardness and thermal fatigue resistance compared to LH. The further increase of the Cr and Mo content in HH leads to the grain coarsening and hardness decreasing, which is supposed to degrade the thermal fatigue resistant properties according to the conventional theory. However, HH exhibited an enhanced thermal fatigue resistance compared to MH. That is because the higher stored energy in MH deteriorated its thermal fatigue resistance compared to HH.https://www.mdpi.com/2075-4701/12/5/735selective laser melting (SLM)chromium hot-work steelsalloying elementshigh-temperature propertiesthermal fatigue |
| spellingShingle | Mei Wang Bo You Yan Wu Bo Liang Xianhui Gao Wei Li Qingsong Wei Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser Melting Metals selective laser melting (SLM) chromium hot-work steels alloying elements high-temperature properties thermal fatigue |
| title | Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser Melting |
| title_full | Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser Melting |
| title_fullStr | Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser Melting |
| title_full_unstemmed | Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser Melting |
| title_short | Effect of Cr, Mo, and V Elements on the Microstructure and Thermal Fatigue Properties of the Chromium Hot-Work Steels Processed by Selective Laser Melting |
| title_sort | effect of cr mo and v elements on the microstructure and thermal fatigue properties of the chromium hot work steels processed by selective laser melting |
| topic | selective laser melting (SLM) chromium hot-work steels alloying elements high-temperature properties thermal fatigue |
| url | https://www.mdpi.com/2075-4701/12/5/735 |
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