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Effect of plastic incompatibility on the strain hardening behavior of Al-TiN nanolayered composites

机译:塑性不相容性对Al-TiN纳米复合材料应变硬化行为的影响

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摘要

The strain hardening behavior of Al-TiN nanolayered composites induced by plastic incompatibility was studied by 3-D discrete dislocation dynamics (DDD) simulations. Our simulations results indicate the strain hardening rate solely induced by the plastic incompatibility is independent of layer thickness and dislocation density at a constant layer thickness ratio, while the yield stress exhibits a strong size effect. Furthermore, the strain hardening rate increases with decreasing Al/TiN layer thickness ratio and our predicted results match well with prior experiment data.
机译:通过3-D离散位错动力学(DDD)模拟研究了由塑料不相容性引起的Al-TiN纳米层复合材料的应变硬化行为。我们的模拟结果表明,在恒定的层厚比下,仅由塑性不相容引起的应变硬化速率与层厚和位错密度无关,而屈服应力则表现出较强的尺寸效应。此外,应变硬化速率随Al / TiN层厚度比的减小而增加,我们的预测结果与先前的实验数据非常吻合。

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