Quantitative analysis on friction stress of hot-extruded AZ31 magnesium alloy at room temperature
| Autor: | Qun Zhang, Jing Zhang, Ling Wang, Yuan Zhang, Ru Ma, Yiquan Zhao, Yinong Wang, Wei-Gang Li, Yandong Liu |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Polymers and Plastics Scattering Annealing (metallurgy) Mechanical Engineering Alloy Metals and Alloys 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Mechanics of Materials 0103 physical sciences Volume fraction Materials Chemistry Ceramics and Composites engineering Weighted average method Extrusion Magnesium alloy Composite material 0210 nano-technology Grain orientation |
| Zdroj: | Journal of Materials Science & Technology. 34:1765-1772 |
| ISSN: | 1005-0302 |
| DOI: | 10.1016/j.jmst.2018.02.011 |
| Popis: | Mg alloy AZ31 with ∼79% (volume fraction of scattering less than 30°) basal-fiber texture through hot extrusion exhibits strong grain-size dependent yield strength. Samples with grain sizes varying from 4.5 to 22.3 μm were obtained by altering annealing time durations. The Hall-Petch relations of tension and compression are σ0.2 = 86+200d−1/2 and σ0.2 = 17 + 327d−1/2, respectively. Considering the correlation between grain orientation and deformation modes, a novel weighted average method of calculating friction stress σ0 was proposed, and results of calculation agreed with the experimental ones, which can reasonably understand the yielding behavior in tension and compression. |
| Databáze: | OpenAIRE |
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