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首页> 外文期刊>Materials Science and Engineering >Factors influencing tensile ductility of ultrafine-grained Mg-3Al-1 Zn alloy sheet at elevated temperatures
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Factors influencing tensile ductility of ultrafine-grained Mg-3Al-1 Zn alloy sheet at elevated temperatures

机译：高温下影响Mg-3Al-1 Zn超细晶粒合金薄板拉伸塑性的因素

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摘要

Tensile elongation behavior of ultrafine-grained (UFG) Mg-3A1-1 Zn (AZ31) alloy sheet (with a mean grain size of 1 μm) produced by high-ratio differential speed rolling was studied at elevated temperatures, and factors influencing the ductility were evaluated. The UFG AZ31 showed an obvious advantage in ductility enhancement below 473 K, but the maximum forming temperature was limited due to high thermal instability of the UFG AZ31 microstructure. There was a pronounced effect of grain coarsening during the sample heating and deformation on strain-rate sensitivity and strain hardening. The tensile elongation behavior of UFG AZ31 with high density of thermally stable (Al, Mg)_2Ca particles was compared with that of UFG AZ31 to see what happens if grain coarsening is well suppressed in UFG AZ31 alloy.
机译：研究了在高温下通过高比差速轧制生产的（UFG）Mg-3A1-1 Zn（AZ31）超细晶粒合金板（平均晶粒度为1μm）的拉伸伸长行为，以及影响延性的因素被评估。 UFG AZ31在473 K以下的延展性增强方面显示出明显的优势，但由于UFG AZ31微结构的高热不稳定性，最高成型温度受到限制。在样品加热和变形过程中，晶粒粗化对应变率敏感性和应变硬化有显着影响。比较了具有高密度的热稳定（Al，Mg）_2Ca颗粒的UFG AZ31与UFG AZ31的拉伸伸长行为，以了解如果UFG AZ31合金中的晶粒粗化得到了很好的抑制，会发生什么。

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