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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >Modeling of Strain Rate Effects on Microstructure Evolution and Mechanical Properties of HSLA and IF-Ti Steels
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Modeling of Strain Rate Effects on Microstructure Evolution and Mechanical Properties of HSLA and IF-Ti Steels

机译：应变速率对HSLA和IF-Ti钢的组织演变和力学性能影响的建模

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摘要

This study presents some modeling aspects of mechanical behavior under dynamic loading. The simulations of the compression tests were conducted using the integrated computer model. Zerilli-Armstrong model was deduced with the results to describe the flow behavior. The relative change in dislocation density is incorporated into equations describing deformation-hardening models of dynamically loaded fertile, ferrite-austenite and austenite structures. In order to verify the model and study effects of high strain rates on mechanical and microstructural behavior, we performed compression tests under various temperatures, strains and strain rate conditions. The evolution of the microstructure, as well as mechanical response of the material affected by the deformation parameters were observed and analyzed. The effects of variations in microstructure and dislocation structures evolution during loading on the material flow stress were evaluated, followed by the optical and TEM microscopy analysis. The results presented in this study emphasize the significance of the role of both microstructure and mechanical response of materials in the dynamic regime.
机译：这项研究提出了在动态载荷下力学行为的一些建模方面。压缩测试的模拟是使用集成计算机模型进行的。推导了Zerilli-Armstrong模型，并用其结果描述了流动行为。位错密度的相对变化被纳入描述动态加载的铁素体，铁素体-奥氏体和奥氏体结构的变形硬化模型的方程式中。为了验证模型并研究高应变率对机械和微观结构行为的影响，我们在各种温度，应变和应变率条件下进行了压缩测试。观察并分析了受变形参数影响的材料的微观结构演变以及机械响应。评估了加载过程中微观结构和位错结构演变的变化对材料流动应力的影响，然后进行了光学和TEM显微镜分析。在这项研究中提出的结果强调了在动态状态下材料的微观结构和机械响应的作用的重要性。

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