Development of heat-treatable Al-5Mg alloy sheets with the addition of Zn
| Autor: | Juhee Yun, Donghyun Bae, Seung Won Kang, Sangjun Lee |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Alloy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Zn element Mechanics of Materials 0103 physical sciences Ultimate tensile strength Hardening (metallurgy) engineering General Materials Science Elongation Composite material 0210 nano-technology Grain Boundary Sliding |
| Zdroj: | Materials Science and Engineering: A. 744:21-27 |
| ISSN: | 0921-5093 |
| Popis: | For a non-heat-treatable Al-5Mg alloy sheet, Zn was selected as an additive for precipitate hardening in the alloys. As the Zn content increases to 5 wt%, for recrystallized sheets, a high elongation to failure, along with the high tensile strength, was observed due to the activities of deformation band formation and grain boundary sliding. After aging treatment at 120 °C, Al-5Mg-5Zn alloy was reinforced by τ-phase (Mg32(Al,Zn)49) precipitates because the phase is formed the addition of 3.54 wt% Zn in Al-5Mg alloy. The precipitates are effective in the alloy, showing a yield strength of 433.4 MPa, the value of which is 4-times higher than that of Al-5Mg alloy. Thus, for a proper selection when adding Zn element to Al-5Mg alloy, a reinforcement of the strengthening mechanism can be induced, leading to much higher strength without a degradation of the elongation to failure. |
| Databáze: | OpenAIRE |
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