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Numerical and experimental investigation of the effect of height-width ratio of the sample on cyclic channel die compression process
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1.School of Materials Science and Engineering,Jiangsu University of Science and Technology;2.School of Materials Science and Engineering,Jiangsu University;3.Jiangsu Jinyuan Forging Co,Ltd

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TG316.3

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    Abstract:

    Severe plastic deformation can be achieved in the sample via cyclic channel die compression (CCDC) without changing its shape and size. The height/width ratio is one of the important parameters that affect the CCDC process. A finite element method and experimental validation are employed to investigate the effect of height/width ratio of the sample on compression process, microstructure and properties in this study. The results show that the effective strain is inhomogeneous after deformation. The larger the height/width ratio is, the larger the average effective strain for a single pass compression, and the higher the effective stress. After one pass, grains are squashed, and more serious as the height/width ratio increases. After 3 passes, a large number of shear bands are formed, and become narrow with the increase of height/width ratio. After 12 passes, more equiaxed and finer grains are obtained in the sample with height/width ratio of 2. Hardness of pure copper increases significantly after CCDC, and the hardness value of the sample is higher with height/width ratio of 2.

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[SHI Fengjian, ZHANG Jianwei, WANG Leigang, SHAO Yong, GE Yanming, YE Sizhen, WANG Hao. Numerical and experimental investigation of the effect of height-width ratio of the sample on cyclic channel die compression process[J]. Rare Metal Materials and Engineering,2020,49(9):3170~3176.]
DOI:10.12442/j. issn.1002-185X.20190702

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History
  • Received:August 25,2019
  • Revised:December 27,2019
  • Adopted:January 03,2020
  • Online: October 15,2020
  • Published: