Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy Superalloy
In this work, the quantification of key microstructural features like γ′ size morphology distribution, grain size, and localized stress distribution, especially near a fracture, were coupled with mechanical properties under various temperatures in Ni-base powder metallurgy superalloys subjected to s...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/13/4524 |
| _version_ | 1797408736437862400 |
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| author | Xianjue Ye Biaobiao Yang Jiantao Liu Yunping Li |
| author_facet | Xianjue Ye Biaobiao Yang Jiantao Liu Yunping Li |
| author_sort | Xianjue Ye |
| collection | DOAJ |
| description | In this work, the quantification of key microstructural features like γ′ size morphology distribution, grain size, and localized stress distribution, especially near a fracture, were coupled with mechanical properties under various temperatures in Ni-base powder metallurgy superalloys subjected to sub-solvus or super-solvus heat treatments. Compared to super-solvus heat-treated alloy, sub-solvus heat-treated superalloy with a finer grain size exhibited higher ductility/strength at 550 °C, whilst adverse trend was observed at higher temperatures (750 and 830 °C). Besides, for both alloys, the strength and ductility decreased with the decrease in strain rate, resulting from oxidation behavior. Larger grain size or less grain boundary density can facilitate the retardation of oxidation behavior and weaken the propensity of early failure at higher temperatures. |
| first_indexed | 2024-03-09T04:03:54Z |
| format | Article |
| id | doaj.art-bca411f523994b86baaaeadcf6caafd6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T04:03:54Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-bca411f523994b86baaaeadcf6caafd62023-12-03T14:10:18ZengMDPI AGMaterials1996-19442022-06-011513452410.3390/ma15134524Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy SuperalloyXianjue Ye0Biaobiao Yang1Jiantao Liu2Yunping Li3State Key Lab for Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Lab for Powder Metallurgy, Central South University, Changsha 410083, ChinaHigh Temperature Material Research Institute, Central Iron and Steel Research Institute, Beijing 100081, ChinaState Key Lab for Powder Metallurgy, Central South University, Changsha 410083, ChinaIn this work, the quantification of key microstructural features like γ′ size morphology distribution, grain size, and localized stress distribution, especially near a fracture, were coupled with mechanical properties under various temperatures in Ni-base powder metallurgy superalloys subjected to sub-solvus or super-solvus heat treatments. Compared to super-solvus heat-treated alloy, sub-solvus heat-treated superalloy with a finer grain size exhibited higher ductility/strength at 550 °C, whilst adverse trend was observed at higher temperatures (750 and 830 °C). Besides, for both alloys, the strength and ductility decreased with the decrease in strain rate, resulting from oxidation behavior. Larger grain size or less grain boundary density can facilitate the retardation of oxidation behavior and weaken the propensity of early failure at higher temperatures.https://www.mdpi.com/1996-1944/15/13/4524PM superalloysolution treatmenthigh temperaturetensileoxidation |
| spellingShingle | Xianjue Ye Biaobiao Yang Jiantao Liu Yunping Li Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy Superalloy Materials PM superalloy solution treatment high temperature tensile oxidation |
| title | Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy Superalloy |
| title_full | Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy Superalloy |
| title_fullStr | Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy Superalloy |
| title_full_unstemmed | Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy Superalloy |
| title_short | Correlation between Microstructure and Mechanical Properties of Heat-Treated Novel Powder Metallurgy Superalloy |
| title_sort | correlation between microstructure and mechanical properties of heat treated novel powder metallurgy superalloy |
| topic | PM superalloy solution treatment high temperature tensile oxidation |
| url | https://www.mdpi.com/1996-1944/15/13/4524 |
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