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Investigation on micro-hardness with shear strain extent for copper specimens subjected to high pressure torsion
Liu Y; Hong YS(洪友士); Fan KK; Ji XD; Liu, Y. (
Source PublicationProceedings of SPIE - The International Society for Optical Engineering
Conference NameInternational Conference on Experimental Mechanics 2008, ICEM 2008
Conference DateNovember 8, 2008 - November 8, 2008
Conference PlaceNanjing, China
AbstractHigh Pressure Torsion (HPT) is an effective way to diminish the size of the crystal particles and improve the mechanical performance of metal material. In this study, the micro-hardness, size of crystal particles and shear strain of copper samples treated with HPT and their relationship were investigated. The results showed that the micro-hardness of the HPT copper increases from 50 to 140 when the nominal shear strain increases from 0 to 5. Then it reached saturation state and the micro-hardness didn't increase obviously when the shear strain increased further. The grain size becomes smaller as the distance away from the centre of sample for the sample with fewer turns of torsion. For the sample with more turns of torsion, in addition to the grain size refinement, the micro-hardness reaches saturation and its spatial distribution is uniform both along thickness and radius direction. © 2009 SPIE.
KeywordCrystal Particles Grain Size Grain Size Refinement High Pressure Torsions Mechanical Performance Metal Materials Radius Direction Saturation State Spatial Distribution
Indexed ByEI
Document Type会议论文
Corresponding AuthorLiu, Y. (
Recommended Citation
GB/T 7714
Liu Y,Hong YS,Fan KK,et al. Investigation on micro-hardness with shear strain extent for copper specimens subjected to high pressure torsion[C],2009.
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