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Microstructure-property relations throughout the powder metallurgy process.

机译:整个粉末冶金过程中的微观结构与性能的关系。

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摘要

To produce crack free powder compacts with desirable mechanical properties and uniform densities, a predictive finite element simulation of the powder metallurgy process is necessary (compaction and sintering). The finite element method, through the use of appropriate constitutive material models captures the microstructure-property history after compaction and sintering. A FC-0205 cylinder and FC-0208 automotive main bearing cap were compacted to investigate the microstructure changes at different locations within the parts. Measurements of the pore volume fraction, pore size, pore nearest neighbor, pore aspect ratio, and grain size were performed after compaction for the cylinder after compaction and after compaction and sintering for the MBC.;An image analysis methodology was created to measure density in the main bearing cap, and to validate future model results. A comparison between the image analysis and the Archimedes immersion methods demonstrated the reliability of the methods.
机译:为了生产具有所需机械性能和均匀密度的无裂纹粉末压坯,必须对粉末冶金过程(压实和烧结)进行可预测的有限元模拟。通过使用适当的本构材料模型,有限元方法可以捕获压实和烧结后的微观结构性能历史。压实了FC-0205气缸和FC-0208汽车主轴承盖,以研究零件内不同位置的微观结构变化。在压实后对圆柱体进行压实后,对MBC进行压实和烧结之后,对孔体积分数,孔尺寸,孔最近邻孔,孔纵横比和晶粒度进行测量。主轴承盖,并验证未来的模型结果。图像分析和阿基米德浸没法之间的比较证明了该方法的可靠性。

著录项

  • 作者

    Tucker, Laura Arias.;

  • 作者单位

    Mississippi State University.;

  • 授予单位 Mississippi State University.;
  • 学科 Engineering Mechanical.;Engineering Metallurgy.
  • 学位 M.S.
  • 年度 2007
  • 页码 81 p.
  • 总页数 81
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;冶金工业;
  • 关键词

  • 入库时间 2022-08-17 11:39:35

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