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首页> 外文期刊>Journal of Materials Engineering and Performance >Hot Deformation Behavior and Intrinsic Workability of Carbon Nanotube-Aluminum Reinforced ZA27 Composites
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Hot Deformation Behavior and Intrinsic Workability of Carbon Nanotube-Aluminum Reinforced ZA27 Composites

机译：碳纳米管铝加固ZA27复合材料的热变形行为及本征可加工性

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摘要

Using a controlled thermal simulator system, hybrid carbon nanotube-aluminum reinforced ZA27 composites were subjected to hot compression testing in the temperature range of 473-523 K with strain rates of 0.01-10 s(-1). Based on experimental results, a developed-flow stress model was established using a constitutive equation coupled with strain to describe strain softening arising from dynamic recrystallization. The intrinsic workability was further investigated by constructing three-dimensional (3D) processing maps aided by optical observations of microstructures. The 3D processing maps were constructed based on a dynamic model of materials to delineate variations in the efficiency of power dissipation and flow instability domains. The instability domains exhibited adiabatic shear band and flow localization, which need to be prevented during hot processing. The recommended domain is predicated to be within the temperature range 550-590 K and strain rate range 0.01-0.35 s(-1). In this state, the main softening mechanism is dynamic recrystallization. The results from processing maps agree well with the microstructure observations.
机译：使用受控的热模拟器系统，在473-523k的温度范围内进行混合碳纳米管 - 铝增强的Za27复合材料，其应变率为0.01-10s（-1）。基于实验结果，使用耦合的组成方程建立发达的流量应力模型，以描述由动态再结晶产生的应变软化。通过微结构的光学观察构建三维（3D）处理图，进一步研究了内在的可加工性。基于材料的动态模型构建3D处理地图，以描绘功耗和流量不稳定域的效率的变化。不稳定域表现出绝热剪切带和流量定位，在热处理期间需要防止。推荐的域预先温度范围为550-590 k和应变率范围0.01-0.35 s（-1）。在这种状态下，主要的软化机制是动态的再结晶。处理地图的结果与微观结构观测相同。

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