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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：利用受控热模拟系统，在473-523K的温度范围内，以0.01-10s（-1）的应变速率，对碳纳米管-铝复合材料ZA27进行了热压缩试验。基于实验结果，采用本构方程结合应变描述动态再结晶引起的应变软化，建立了流变应力模型。借助显微结构的光学观察，通过构建三维（3D）加工图，进一步研究了其内在可加工性。3D加工图基于材料的动态模型构建，以描绘功率耗散效率和流动不稳定区域的变化。不稳定区域表现出绝热剪切带和流动局部化，这需要在热处理过程中加以防止。建议的温度范围为550-590 K，应变速率范围为0.01-0.35 s（-1）。在这种状态下，主要的软化机制是动态再结晶。加工图的结果与微观结构观察结果一致。

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