Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4Sc
The scarcity of studies on the high-temperature creep behavior of laser welds in heat-resistant Al alloys limits their widespread application. This study examines the effects of laser welding and heat treatment on the high-temperature creep performance of the Al–12Ce-0.4Sc alloy at 300 °C. The joint...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424030333 |
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| author | Jie Ning Chao Feng Linjie Zhang |
| author_facet | Jie Ning Chao Feng Linjie Zhang |
| author_sort | Jie Ning |
| collection | DOAJ |
| description | The scarcity of studies on the high-temperature creep behavior of laser welds in heat-resistant Al alloys limits their widespread application. This study examines the effects of laser welding and heat treatment on the high-temperature creep performance of the Al–12Ce-0.4Sc alloy at 300 °C. The joint subjected to post-heat treatment demonstrated superior high-temperature creep properties at 300 °C, with no fractures occurring after 100 h of creep at 55 MPa. The steady-state creep rate was approximately 9 × 10−9 s−1. The disappearance of primary Al11Ce3 in the weld area, coupled with a significant reduction in grain size and the presence of cellular eutectic Al11Ce3, are the primary factors contributing to its superior resistance to high-temperature creep compared to the base material. The Schmid factor for the [111] ⟨11‾0⟩ slip system and the changes in dislocation density before and after creep were analyzed. The proportion of soft orientation in the Schmid factor for the base material was greater than that for the weld in its as-welded state. The dislocation density in the fusion zone of the joint subjected to post-heat treatment increased by only 6 × 1012 m−2 after 100 h of creep, which is significantly lower than that of the weld in its as-welded state. |
| format | Article |
| id | doaj-art-33098929c9e0478291a597c7f3cb4c78 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-33098929c9e0478291a597c7f3cb4c782025-01-19T06:25:53ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013420902100Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4ScJie Ning0Chao Feng1Linjie Zhang2State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, ChinaCorresponding author.; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, ChinaThe scarcity of studies on the high-temperature creep behavior of laser welds in heat-resistant Al alloys limits their widespread application. This study examines the effects of laser welding and heat treatment on the high-temperature creep performance of the Al–12Ce-0.4Sc alloy at 300 °C. The joint subjected to post-heat treatment demonstrated superior high-temperature creep properties at 300 °C, with no fractures occurring after 100 h of creep at 55 MPa. The steady-state creep rate was approximately 9 × 10−9 s−1. The disappearance of primary Al11Ce3 in the weld area, coupled with a significant reduction in grain size and the presence of cellular eutectic Al11Ce3, are the primary factors contributing to its superior resistance to high-temperature creep compared to the base material. The Schmid factor for the [111] ⟨11‾0⟩ slip system and the changes in dislocation density before and after creep were analyzed. The proportion of soft orientation in the Schmid factor for the base material was greater than that for the weld in its as-welded state. The dislocation density in the fusion zone of the joint subjected to post-heat treatment increased by only 6 × 1012 m−2 after 100 h of creep, which is significantly lower than that of the weld in its as-welded state.http://www.sciencedirect.com/science/article/pii/S2238785424030333Heat-resistant Al alloyAl-Ce alloyLaser weldingHigh-temperature creepMicrostructure |
| spellingShingle | Jie Ning Chao Feng Linjie Zhang Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4Sc Journal of Materials Research and Technology Heat-resistant Al alloy Al-Ce alloy Laser welding High-temperature creep Microstructure |
| title | Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4Sc |
| title_full | Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4Sc |
| title_fullStr | Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4Sc |
| title_full_unstemmed | Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4Sc |
| title_short | Investigation on high-temperature creep behavior at 300 °C in laser-welded joints of a novel heat-resistant Al alloy of Al–12Ce-0.4Sc |
| title_sort | investigation on high temperature creep behavior at 300 °c in laser welded joints of a novel heat resistant al alloy of al 12ce 0 4sc |
| topic | Heat-resistant Al alloy Al-Ce alloy Laser welding High-temperature creep Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424030333 |
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