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

[1] Effects of thermomechanical treatment on the microstructure, precipitation strengthening, internal friction, and thermal stability of Al-Er-Yb-Sc alloys with good electrical conductivity
Barkov, R. Yu
Mikhaylovskaya, A., V
Yakovtseva, O. A.
Loginova, I. S.
Prosviryakov, A. S.
Pozdniakov, A., V
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 855
[2] Effect of Y on microstructure and mechanical properties of Al-Mg-Mn-Zr-Sc alloy with low Sc content
Barkov, R. Yu.
Pozdniakov, A. V.
Tkachuk, E.
Zolotorevskiy, V. S.
[J]. MATERIALS LETTERS, 2018, 217 : 135 - 138
[3] Coarsening resistance at 400 °C of precipitation-strengthened Al-Zr-Sc-Er alloys
Booth-Morrison, Christopher
Dunand, David C.
Seidman, David N.
[J]. ACTA MATERIALIA, 2011, 59 (18) : 7029 - 7042
[4] Temporal evolution of the nanostructure of Al(Sc,Zr) alloys:: Part II-coarsening of Al3(Sc1-xZrx) precipitates
Fuller, CB
Seldman, DN
[J]. ACTA MATERIALIA, 2005, 53 (20) : 5415 - 5428
[5] Temporal evolution of the nanostructure of AI(Sc,Zr) alloys:: Part I -: Chemical compositions of Al3(Sc1-xZrx) precipitatesy
Fuller, CB
Murray, JL
Seidman, DN
[J]. ACTA MATERIALIA, 2005, 53 (20) : 5401 - 5413
[6] Recent Progress in High-Temperature Resistant Aluminum-Based Alloys: Microstructural Design and Precipitation Strategy
Gao Yihan
Liu Gang
Sun Jun
[J]. ACTA METALLURGICA SINICA, 2021, 57 (02) : 129 - 149
[7] The formation of Al3(ScxZryHf1-x-y)-dispersoids in aluminium alloys
Hallem, H
Lefebvre, W
Forbord, B
Danoixb, F
Marthinsen, K
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 421 (1-2): : 154 - 160
[8] Correlation between precipitates evolution and mechanical properties of Al-Sc-Zr alloy with Er additions
Liu, Li
Jiang, Jian-Tang
Cui, Xiang-Yuan
Zhang, Bo
Zhen, Liang
Ringer, Simon P.
[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2022, 99 : 61 - 72
[9] Effect of Scandium in Al-Sc and Al-Sc-Zr Alloys Under Precipitation Strengthening Mechanism at 350 °C Aging
Na, Xue
Wenqing Liu
Liu, Zhu
Muthuramalingam, T.
[J]. METALS AND MATERIALS INTERNATIONAL, 2021, 27 (12) : 5145 - 5153
[10] Investigation of Thermal Stability of Microstructure and Mechanical Properties of Bimetallic Fine-Grained Wires from Al-0.25%Zr-(Sc,Hf) Alloys
Nokhrin, Aleksey
Shadrina, Iana
Chuvil'deev, Vladimir
Kopylov, Vladimir
Berendeev, Nikolay
Murashov, Artem
Bobrov, Aleksandr
Tabachkova, Nataliya
Smirnova, Elena
Faddeev, Mikhail
[J]. MATERIALS, 2022, 15 (01)

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