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Gradient structure produced by three roll planetary milling: Numerical simulation and microstructural observations

机译:三辊行星铣削产生的梯度结构:数值模拟和微观结构观察

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摘要

In this study a gradient grain structure was produced by processing rod billets through three roll planetary milling (also known as PSW process). This kind of gradient structure is reported to provide an excellent combination of strength and ductility owing to an ultrafine-grained surface layer and a coarsegrained interior of the billet. Specifically, copper rod samples were subjected to up to six passes of PSW at room temperature. To study the evolution of the microstructure during the deformation, microhardness measurements and Electron Backscatter Diffraction (EBSD) analysis were performed after one, three and six passes. Additionally, the distributions of the equivalent stress during PSW and the equivalent strain after processing were studied by finite element analysis using the commercial software QFORM. The results showed the efficacy of PSW as a means of imparting a gradient ultrafine-grained structure to copper rods. A good correlation between the simulated equivalent strain distribution and the measured microhardness distribution was demonstrated.
机译:在这项研究中,通过三辊行星式铣削(也称为PSW工艺)加工棒坯来产生梯度晶粒结构。据报道这种梯度结构由于超细晶粒的表面层和坯料内部的粗糙晶粒而提供了强度和延展性的极佳组合。具体而言,铜棒样品在室温下经受多达六次的PSW检验。为了研究变形过程中微观结构的演变,经过一,三和六次通过后,进行了显微硬度测量和电子背散射衍射(EBSD)分析。此外,使用商业软件QFORM通过有限元分析研究了PSW期间的等效应力和加工后的等效应变的分布。结果表明,PSW可以有效地为铜棒赋予梯度超细结构。结果表明,模拟等效应变分布与测得的显微硬度分布之间具有良好的相关性。

著录项

  • 来源
    《Materials Science and Engineering》 |2015年第15期|165-172|共8页
  • 作者单位

    School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China,Center for Advanced Hybrid Materials, Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia;

    Center for Advanced Hybrid Materials, Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia;

    Department of Materials Science and Engineering, Seoul National University, 151-742, Republic of Korea;

    Center for Advanced Hybrid Materials, Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia;

    Department of Materials Science and Engineering, Seoul National University, 151-742, Republic of Korea;

    School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;

    Center for Advanced Hybrid Materials, Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia,Laboratory of Hybrid Nanostructured Materials, NITU MISIS, Leninskii prospect 4, Moscow 119049, Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Copper rods; Gradient structure; Ultrafine grains; Three roll planetary milling; PSW;

    机译:铜棒;渐变结构;超细晶粒;三辊行星式铣削;PSW;

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