Aluminum Alloys with Identical Plastic Flow and Different Strain Rate Sensitivity
作者： R. C. Picu , F. Ozturk , E. Esener , R. Li
DOI: 10.1007/S11661-010-0423-Z
关键词: Metallurgy 、 Strain rate 、 Materials science 、 Flow stress 、 Structural material 、 Composite material 、 Strain hardening exponent 、 Alloy 、 Plasticity 、 Stress (mechanics) 、 Aluminium
摘要: Mg-rich and Si-rich aluminum alloys from the AA6XXX class are considered to demonstrate that standard heat treatments can be used produce materials with identical plastic flow (yield stress strain hardening) different rate sensitivity. The alloy exhibits lower sensitivity a variation of this parameter (Haasen plot) relative alloy. This is due instantaneous component being smaller in Hence, underlying mechanism not related presence free, fast diffusing Mg atoms, but rather nature precipitates forming two alloys. A simple model it possible tailor while preserving by controlling dislocation-precipitate interaction.
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