High temperature tensile behavior of Mg-2Al and Mg-6Al alloys
| Autor: | Fubo Bian, Long Zheng, Tian-gang Niu, Jiaxing Ji, Jun Qiao, Min He |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Alloy Metals and Alloys 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 030226 pharmacology & pharmacy Stress (mechanics) 03 medical and health sciences 0302 clinical medicine Deformation mechanism Creep Phase (matter) Ultimate tensile strength Materials Chemistry engineering Physical and Theoretical Chemistry Elongation Composite material 0210 nano-technology Dissolution |
| Zdroj: | International Journal of Materials Research. 109:28-33 |
| ISSN: | 2195-8556 1862-5282 |
| Popis: | Effects of 2 and 6 wt.% Al additions on the high temperature tensile behavior of Mg were investigated. Elongation-to-failure tensile tests were conducted at four temperatures (300, 350, 400, and 450 °C) and two strain rates (10− 2 and 10−3 s−1) to study tensile ductility. Strain-rate-change tensile tests were conducted at the same temperatures over a strain-rate range of 5 × 10−5–2 × 10−2 s−1. The experimental data show that the coarse-grained alloys exhibit elongations of about 100% at 450 °C and 10−3 s−1, and the Mg-6Al alloy presents a significant elongation improvement at 400 and 450 °C. Compared with pure Mg, Al additions of 2 and 6 wt.% effectively reduce the stress exponent, which decreases with increasing Al content. The reduced stress exponents may result from solute-drag creep created by Al atoms released from dissolution of Mg17Al12 phase at high temperatures. |
| Databáze: | OpenAIRE |
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