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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 |
Appears in Collections: | Staff Publications Elements |
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Improvement in compressive creep behavior of Al-0.2Zr alloy via Sc microalloying.pdf | Accepted version | 1.84 MB | Adobe PDF | OPEN | Post-print | View/Download |
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