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首页> 外文期刊>Metals and Materials International >Constitutive Modeling and Understanding of the Hot Compressive Deformation of Mg-9.5Zn-2.0Y Magnesium Alloy With Reduced Number of Strain-Dependent Constitutive Parameters
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Constitutive Modeling and Understanding of the Hot Compressive Deformation of Mg-9.5Zn-2.0Y Magnesium Alloy With Reduced Number of Strain-Dependent Constitutive Parameters

机译：构筑型载体依赖性组成型参数减少数量的Mg-9.5Zn-2.0Y镁合金热压缩变形的构图和理解

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The hot compressive flow behavior of the cast Mg-9.5Zn-2.0Y alloy as a function of strain was analyzed, and the degree of dependence of the parameters (A: material constant, n(2): stress exponent, Q(c) : activation energy for plastic flow and a: stress multiplier) of the constitutive equation () upon the strain was examined in a systematic manner. This is to explore the possibility of representing the hot compressive deformation behavior of metallic alloys in a simple way by using a reduced number of strain-dependent constitutive parameters. The analysis results for several different cases can be interpreted as follows: (1) Q(c) can be treated as being strain-independent, which is physically sensible; (2) while only the microstructure changes as a function of strain at low flow stresses, as the flow stress increases, the power-law creep deformation and power-law breakdown mechanisms change; (3) the regime where only A is strain dependent expanded to higher strain rates and lower temperatures as the strain increased, suggesting that the number of the strain-dependent parameters decreases as the initial microstructure is refined by dynamic recrystallization, and the microstructure approaches a steady state.
机译：分析铸造Mg-9.5Zn-2.0y合金作为菌株函数的热压缩流动，以及参数的依赖性（A：材料常数，N（2）：应力指数，Q（C） ：以系统的方式检查组成型等式（）的塑性流动的激活能量和：应力乘法器）。这是探讨通过使用减少的应变依赖性组成型参数以简单的方式代表金属合金的热压缩变形行为的可能性。几种不同病例的分析结果可以解释如下：（1）Q（c）可以将其视为应变无关的，其在物理上是明智的; （2）在低流量应力下仅作为应变的功能变化，随着流量应力的增加，动力法蠕变变形和动力法击穿机制变化; （3）仅在菌株增加时，仅α依赖于应变的结果依赖于较高的应变率和较低的温度，表明应变依赖性参数的数量随着动态再结晶改变的初始微观结构而降低，并且微观结构接近稳定状态。

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