Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.matchar.2019.110024
Title: Improvement in compressive creep resistance of Al-0.2Zr alloy with L1(2) structured Sc-enriched precipitates
Authors: Zhang, Jiayi 
Wang, Bin 
Wang, Hao 
Zhang, Chaomin
Keywords: Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science, Characterization & Testing
Materials Science
A1-0.2Zr-0.1Sc alloy
Compressive creep behaviors
Al-3(Zr,Sc)
Al3Sc
Critical creep stress
MECHANICAL-PROPERTIES
RECRYSTALLIZATION BEHAVIOR
TENSILE PROPERTIES
AGING BEHAVIOR
AL-ZR
MICROSTRUCTURE
EVOLUTION
STRENGTH
TI
Issue Date: 1-Jan-2020
Publisher: ELSEVIER SCIENCE INC
Citation: Zhang, Jiayi, Wang, Bin, Wang, Hao, Zhang, Chaomin (2020-01-01). Improvement in compressive creep resistance of Al-0.2Zr alloy with L1(2) structured Sc-enriched precipitates. MATERIALS CHARACTERIZATION 159. ScholarBank@NUS Repository. https://doi.org/10.1016/j.matchar.2019.110024
Abstract: © 2019 Elsevier Inc. The influence of Sc microalloying on compressive creep behaviors of Al-0.2Zr and Al-0.2Zr-0.1Sc alloy have been studied. The steady state creep rate of Al-0.2Zr-0.1Sc alloy ranged from 1.124 × 10−9 s−1 to 1.926 × 10−8 s−1 at 90–150 °C /70 MPa. By contrast, the steady state creep rate of Al-0.2Zr alloy ranged from 6.862 × 10−8 s−1 to 8.560 × 10−7 s−1, indicating that Sc addition significantly improve the compressive creep resistance of Al-0.2Zr alloy. According to the TEM micrographs, except for Al3(Zr,Sc) precipitates precipitated during aging, a large number of fine dispersed Al3Sc precipitates precipitated after creep for 70 h, which significantly hinder movements of dislocations and grain boundaries. As a result, the steady-state creep rate of Al-0.2Zr-0.1Sc alloy slightly decreases after 70 h at 150 °C /70 MPa. The critical creep stress value of Al-0.2Zr alloy is 47.2 MPa, and that of Al-0.2Zr-0.1Sc alloy is 68.4 MPa. The higher critical creep stress value indicates the more excellent compressive creep resistance.
Source Title: MATERIALS CHARACTERIZATION
URI: https://scholarbank.nus.edu.sg/handle/10635/168901
ISSN: 10445803
18734189
DOI: 10.1016/j.matchar.2019.110024
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