Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic Refinement
The effects of the addition of 0.29 wt% Ce on the high-temperature mechanical properties of an Al−Cu−Li alloy were investigated. Ce addition contributes to T1 (Al<sub>2</sub>CuLi) phase coarsening inhibition and Ce-containing intermetallic refinement which greatly imp...
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doaj-ba80b924d8a344c9a320a425c7d3f3682020-11-24T21:44:25ZengMDPI AGMaterials1996-19442019-05-01129152110.3390/ma12091521ma12091521Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic RefinementXinxiang Yu0Zhiguo Zhao1Dandan Shi2Han Dai3Jie Sun4Xiaoyan Dong5Laboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaTesting Center, Hang Xin Material Technology Co., Ltd., Longkou 264006, ChinaTesting Center, Hang Xin Material Technology Co., Ltd., Longkou 264006, ChinaLaboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaLaboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaLaboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaThe effects of the addition of 0.29 wt% Ce on the high-temperature mechanical properties of an Al−Cu−Li alloy were investigated. Ce addition contributes to T1 (Al<sub>2</sub>CuLi) phase coarsening inhibition and Ce-containing intermetallic refinement which greatly improved the thermal stability and high-temperature deformation uniformity of this alloy. On the one hand, small Ce in solid solution and segregation at phase interface can effectively prevent the diffusion and convergence of the main element Cu on T1 phase during thermal exposure. Therefore, the thermal stability of Ce-containing alloy substantiality improves during thermal exposure at the medium-high-temperature stage (170 °C to 270 °C). On the other hand, the increment of the tensile elongation in Ce-containing alloy is much greater than that in Ce-free alloy at high temperatures tensile test, because the refined Al<sub>8</sub>Cu<sub>4</sub>Ce intermetallic phase with high-temperature stability are mainly located in the fracture area with plastic fracture characteristics. This work provides a new method for enhancing high-temperature mechanical properties of Al−Cu−Li alloy which could be used as a construction material for high-temperature structural components.https://www.mdpi.com/1996-1944/12/9/1521Al–Cu–Li alloyceriumthermal stabilityintermetallicmicrostructure |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xinxiang Yu Zhiguo Zhao Dandan Shi Han Dai Jie Sun Xiaoyan Dong |
spellingShingle |
Xinxiang Yu Zhiguo Zhao Dandan Shi Han Dai Jie Sun Xiaoyan Dong Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic Refinement Materials Al–Cu–Li alloy cerium thermal stability intermetallic microstructure |
author_facet |
Xinxiang Yu Zhiguo Zhao Dandan Shi Han Dai Jie Sun Xiaoyan Dong |
author_sort |
Xinxiang Yu |
title |
Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic Refinement |
title_short |
Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic Refinement |
title_full |
Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic Refinement |
title_fullStr |
Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic Refinement |
title_full_unstemmed |
Enhanced High-Temperature Mechanical Properties of Al–Cu–Li Alloy through T1 Coarsening Inhibition and Ce-Containing Intermetallic Refinement |
title_sort |
enhanced high-temperature mechanical properties of al–cu–li alloy through t1 coarsening inhibition and ce-containing intermetallic refinement |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-05-01 |
description |
The effects of the addition of 0.29 wt% Ce on the high-temperature mechanical properties of an Al−Cu−Li alloy were investigated. Ce addition contributes to T1 (Al<sub>2</sub>CuLi) phase coarsening inhibition and Ce-containing intermetallic refinement which greatly improved the thermal stability and high-temperature deformation uniformity of this alloy. On the one hand, small Ce in solid solution and segregation at phase interface can effectively prevent the diffusion and convergence of the main element Cu on T1 phase during thermal exposure. Therefore, the thermal stability of Ce-containing alloy substantiality improves during thermal exposure at the medium-high-temperature stage (170 °C to 270 °C). On the other hand, the increment of the tensile elongation in Ce-containing alloy is much greater than that in Ce-free alloy at high temperatures tensile test, because the refined Al<sub>8</sub>Cu<sub>4</sub>Ce intermetallic phase with high-temperature stability are mainly located in the fracture area with plastic fracture characteristics. This work provides a new method for enhancing high-temperature mechanical properties of Al−Cu−Li alloy which could be used as a construction material for high-temperature structural components. |
topic |
Al–Cu–Li alloy cerium thermal stability intermetallic microstructure |
url |
https://www.mdpi.com/1996-1944/12/9/1521 |
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