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首页> 外文期刊>Journal of Materials Processing Technology >Improving the plastic homogeneity of a magnesium alloy by introducing high volume fraction of twins during ambient extrusion
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Improving the plastic homogeneity of a magnesium alloy by introducing high volume fraction of twins during ambient extrusion

机译：通过在环境挤出过程中引入高体积分数，从而提高镁合金的塑性均匀性

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摘要

Ambient extrusion was conducted to impart different strains on an AZ31 magnesium alloy. Lamellar twins were observed in the strained samples, and twin density increased with strain. Uniaxial tensile tests were conducted on the extruded samples with different strains. An abnormal raise in elongation was observed at higher strains with high volume fraction of {1011} twins. With the increase of extrusion strain, the elongation decreased initially and then got increased from a critical strain ε_(cr) without any sacrifice in strength. The basal texture was weakened due to twinning related crystal lattice rotation. Basal slip was thus easier to activate inside the twinned region to accommodate the plastic strain leading to an increase in elongation. The special twinning skeleton structure was expected to sustain a high stress to resist the necking.
机译：进行环境挤出以赋予AZ31镁合金上的不同菌株。 在应变样品中观察到层状双胞胎，并且随菌株的双密度增加。 在具有不同菌株的挤出样品上进行单轴拉伸试验。 在具有高体积分数的{1011}双胞胎的较高菌株中观察到伸长率异常升高。 随着挤出应变的增加，伸长率最初降低，然后从临界应变ε_（Cr）增加而没有强度牺牲。 由于孪晶相关晶格旋转，基础纹理被削弱。 因此，基底滑动更容易在孪晶区域内激活以适应导致伸长率升高的塑性应变。 预计特殊的孪生骨架结构将维持高应力以抵抗颈缩。

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