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On modeling and experimental validation of extrusion process of lightweight alloys.

机译:关于轻质合金挤压工艺的建模和实验验证。

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摘要

Laboratory-scale extrusion facilitated a parametric study of the metal extrusion process under controlled conditions. Hot extrusion experiments were performed on billets of both aluminum Al1100 as well as, magnesium alloys AZ61 and AM30. Tests were designed and executed with the purpose of recording load and temperature data to validate full-scale thermo-mechanical simulations performed with the commercial code HyperXtrude. Various aspects of flat die and conical die extrusion were observed, studied and modeled with the code. Conventional sine hyperbolic inverse material model was used in the simulations due to present limitations of HyperXtrude. Although this model showed a perfect viscoplastic response at constant temperature and strain rate, by proper changes in the material parameters the model captured the stress softening response characteristic of dynamic recrystallization in magnesium alloys, as shown for the case of AZ61. A framework is also presented for designing and understanding hot extrusion experiments and simulation boundary conditions.
机译:实验室规模的挤压有助于在受控条件下对金属挤压过程进行参数研究。对铝Al1100以及镁合金AZ61和AM30的坯料进行了热挤压实验。设计和执行测试的目的是记录负载和温度数据,以验证使用商业代码HyperXtrude进行的全面热机械仿真。使用代码对扁平模和圆锥模挤出的各个方面进行了观察,研究和建模。由于HyperXtrude目前存在局限性,因此在仿真中使用了常规的正弦双曲逆材料模型。尽管此模型在恒定温度和应变速率下显示出完美的粘塑性响应,但通过适当地改变材料参数,该模型捕获了镁合金中动态再结晶的应力软化响应特性,如AZ61所示。还提供了一个框架,用于设计和理解热挤压实验和模拟边界条件。

著录项

  • 作者

    Parkar, Abdul Afoo.;

  • 作者单位

    Mississippi State University.;

  • 授予单位 Mississippi State University.;
  • 学科 Applied Mechanics.
  • 学位 M.S.
  • 年度 2011
  • 页码 136 p.
  • 总页数 136
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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