The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloy
The effect of homogenization treatments on the microstructure and tensile properties at room temperature and 650 °C of Thermo-Span alloy are systematically investigated. Laves phases with different sizes and morphologies have been obtained by using three types of homogenization treatments. The resul...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421014502 |
| _version_ | 1798024719563227136 |
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| author | Weiwei Zhang Yuanguo Tan Xin Xin Wenru Sun |
| author_facet | Weiwei Zhang Yuanguo Tan Xin Xin Wenru Sun |
| author_sort | Weiwei Zhang |
| collection | DOAJ |
| description | The effect of homogenization treatments on the microstructure and tensile properties at room temperature and 650 °C of Thermo-Span alloy are systematically investigated. Laves phases with different sizes and morphologies have been obtained by using three types of homogenization treatments. The results show that the precipitation of small granular secondary Laves phases and γ' phases are inhibited effectively by large blocky primary Laves phases, resulting in high plasticity and low strength of the alloy. The precipitations of secondary Laves phases and γ' phases increase with the dissolution of primary Laves phases, leading to low plasticity and high strength of the alloy. The secondary Laves phases continue to increase and γ' phases slightly decrease with the almost elimination of primary Laves phases, resulting in high plasticity and strength of the alloy. Hence, fewer large blocky primary Laves phases are more favorable for the best match between strength and ductility. The factors affecting the yield strength at room temperature and 650 °C tensile are discussed in detail. Moreover, it is first found the deformation mechanism of Laves phases i.e. the stacking faults shearing in Thermo-Span alloy. In terms of ductility, small granular secondary Laves phases are more favorable than large blocky primary Laves phases. |
| first_indexed | 2024-04-11T18:07:14Z |
| format | Article |
| id | doaj.art-1f789c37b2b249f3b85701ff7bf884aa |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T18:07:14Z |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-1f789c37b2b249f3b85701ff7bf884aa2022-12-22T04:10:17ZengElsevierJournal of Materials Research and Technology2238-78542022-01-0116386397The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloyWeiwei Zhang0Yuanguo Tan1Xin Xin2Wenru Sun3School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaMechanical Engineering Group, Faculty of Engineering and Environment, University of Southampton, UKSchool of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Corresponding author.School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Corresponding author.The effect of homogenization treatments on the microstructure and tensile properties at room temperature and 650 °C of Thermo-Span alloy are systematically investigated. Laves phases with different sizes and morphologies have been obtained by using three types of homogenization treatments. The results show that the precipitation of small granular secondary Laves phases and γ' phases are inhibited effectively by large blocky primary Laves phases, resulting in high plasticity and low strength of the alloy. The precipitations of secondary Laves phases and γ' phases increase with the dissolution of primary Laves phases, leading to low plasticity and high strength of the alloy. The secondary Laves phases continue to increase and γ' phases slightly decrease with the almost elimination of primary Laves phases, resulting in high plasticity and strength of the alloy. Hence, fewer large blocky primary Laves phases are more favorable for the best match between strength and ductility. The factors affecting the yield strength at room temperature and 650 °C tensile are discussed in detail. Moreover, it is first found the deformation mechanism of Laves phases i.e. the stacking faults shearing in Thermo-Span alloy. In terms of ductility, small granular secondary Laves phases are more favorable than large blocky primary Laves phases.http://www.sciencedirect.com/science/article/pii/S2238785421014502Thermo-span alloyLaves phasesYield strengthDeformation mechanismDuctility |
| spellingShingle | Weiwei Zhang Yuanguo Tan Xin Xin Wenru Sun The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloy Journal of Materials Research and Technology Thermo-span alloy Laves phases Yield strength Deformation mechanism Ductility |
| title | The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloy |
| title_full | The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloy |
| title_fullStr | The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloy |
| title_full_unstemmed | The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloy |
| title_short | The effect of homogenization treatments on the microstructure and mechanical properties of Thermo-Span alloy |
| title_sort | effect of homogenization treatments on the microstructure and mechanical properties of thermo span alloy |
| topic | Thermo-span alloy Laves phases Yield strength Deformation mechanism Ductility |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421014502 |
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