Thermal Stability of the Precipitates in Dilute Al-Er-Zr/Hf Alloys at Elevated Temperature

被引：4

作者：

Wu, Hao ^{[1
]}

Zhang, Qi ^{[1
]}

Li, Li ^{[1
]}

Huang, Mingdong ^{[1
]}

Zheng, Zhikai ^{[1
]}

Wen, Shengping ^{[2
]}

机构：

[1] Chinalco Mat Applicat Res Inst Co Ltd, Beijing 102209, Peoples R China

[2] Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China

来源：

METALS | 2022年 / 12卷 / 08期

关键词：

Al-Er-Zr; Hf alloys; microhardness; precipitate; thermal stability; diffusion; MECHANICAL-PROPERTIES; TEMPORAL EVOLUTION; ZR; NANOSTRUCTURE; ADDITIONS; DESIGN; TI;

D O I：

10.3390/met12081242

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The temporal evolution of microhardness and Al-3(Er,Zr/Hf) precipitates are investigated in Al-Er-Zr/Hf alloys during annealing at 450 degrees C and 500 degrees C. The microhardness of the alloys decreases continuously with the prolonged annealing time due to the coarsening of the precipitates. Different weakening amplitudes are observed because of the disparity of the precipitate coarsening rate that is related to the disparity in their intrinsic diffusivities of Er, Zr, and Hf solute atoms in an Al matrix. The addition of Hf element is beneficial to enhancing the coarsening resistance, thus improving the thermal stability of the alloys. Introducing such elements to improve the thermal stability of precipitates can provide a new idea or choice for the development of heat-resistant aluminum alloys.

引用

页数：8

共 22 条

[21] A study of precipitation strengthening and recrystallization behavior in dilute Al-Er-Hf-Zr alloys
Wu, H.
Wen, S. P.
Wu, X. L.
Gao, K. Y.
Huang, H.
Wang, W.
Nie, Z. R.
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 639 : 307 - 313
[22] Effect of Er additions on the precipitation strengthening of Al-Hf alloys
Wu, H.
Wen, S. P.
Gao, K. Y.
Huang, H.
Wang, W.
Nie, Z. R.
[J]. SCRIPTA MATERIALIA, 2014, 87 : 5 - 8

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