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首页> 外文会议>Asia-Pacific Symposium on Engineering Plasticity and Its Applications(AEPA 2004) pt.2; 20040922-26; Shanghai(CN) >Creep of Metals Subjected to Prior Plastic Deformation
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Creep of Metals Subjected to Prior Plastic Deformation

机译：金属先经过塑性变形后蠕变

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摘要

An influence of prior tensile plastic deformation on the basic creep parameters such as minimum creep rate, time to rupture, duration of creep stages and ductility is studied for copper and aluminium alloy. The materials were tested at two different temperatures; copper at 523 K and 573 K; aluminium alloy at 423 K and 473 K. It is shown for both materials, that depending on the deformation history the basic creep parameters may attain values which are more beneficial from engineering point of view than those for the nonprestrained material determined. It is also shown that in some cases prior plastic deformation may lead to the detrimental effects expressed by the lifetime reduction. The experimental data achieved are discussed in detail and used to verify the basic assumptions of the recovery creep theory.
机译：研究了铜和铝合金的先验拉伸塑性变形对基本蠕变参数（例如最小蠕变速率，断裂时间，蠕变阶段的持续时间和延展性）的影响。这些材料在两个不同的温度下进行了测试。 523 K和573 K的铜;铝合金在423 K和473 K上显示。根据两种材料的变形历史，基本蠕变参数可能会达到一些值，从工程角度来看，这些值比确定的非预应力材料更有利。还表明，在某些情况下，先前的塑性变形可能会导致使用寿命降低，从而产生不利影响。对获得的实验数据进行了详细讨论，并用于验证恢复蠕变理论的基本假设。

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