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Deformation models and the workability criterion of the soft inclusion-containing material based on local strain measurements.

机译：基于局部应变测量的包含软夹杂物的材料的变形模型和可加工性标准。

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摘要

An attempt has been made to develop deformation models and a workability criterion for the metal-working process. This has been done using ferritic ductile iron (spherical graphite cast iron) as a modelling material, since it is a two-phase material, i.e. a steel matrix containing soft graphite spheres. The local deformation can be recorded by following the changes in shape of the deformed graphite spheres.;Mathematical descriptions have been produced for some of the above studies, and a workability criterion generally applicable for metal working was established. The latter is based on local strain measurements.;The gross deformation, the deformation of the matrix, and also that of the soft inclusions, and their inter-relationship were studied. The effect of the deformed inclusions on the mechanical properties of the material was also evaluated. The inhomogeneity of the upsetting deformation, i.e. barrelling of the free surface and the formation of shear bands of the cylindrical specimen during deformation, were investigated. A general evaluation of the workability of ductile iron was made and a comprehensive study of the practical applications of hot forging followed by austempering, to make high strength near-net shape machine components of ductile iron, was also conducted.
机译：已经尝试开发用于金属加工过程的变形模型和可加工性标准。这是使用铁素体球墨铸铁（球形石墨铸铁）作为模型材料完成的，因为它是两相材料，即包含软石墨球的钢基质。可以通过跟踪变形石墨球的形状变化来记录局部变形。上面一些研究已经进行了数学描述，并建立了通​​常适用于金属加工的可加工性标准。后者基于局部应变测量。研究了总变形，基体变形以及软夹杂物的变形及其相互关系。还评估了变形的夹杂物对材料的机械性能的影响。研究了setting锻变形的不均匀性，即自由表面的打桶和变形过程中圆柱试样的剪切带的形成。对球墨铸铁的可加工性进行了综合评估，并对热锻和奥氏体回火的实际应用进行了全面研究，以制造高强度近净形球墨铸铁机械零件。

著录项

  • 作者

    Shi, Jiwei.;

  • 作者单位

    Queen's University (Canada).;

  • 授予单位 Queen's University (Canada).;
  • 学科 Engineering Metallurgy.;Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 1992
  • 页码 212 p.
  • 总页数 212
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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