CYCLIC DEFORMATION RESPONSE OF ARBED COPPER WITH COMPOSITE-NATURED ULTRA-FINE-MICROSTRUCTURES AND ITS COMPARISON WITH CYCLIC DEFORMATION RESPONSE OF ECAPED COPPER
The composite microstructure found in ARBed materials has yielded cyclic softening and cyclic creep response,both of which,especially the former,have been attributed to the grain coarsening phenomenon.Surface damage due to shear banding was also found.Grain coarsening was located near and along the pre-existent shear bands;whereas the already coarsened grains from processing were found to accommodate some plastic strain.Comparison between ECAPed and ARBed copper,specifically the micromechanisms involved in accommodating cyclic plastic strain,will be carried out.Similarities between the two types of materials are analyzed to arise from the similar microstructures;whereas the dissimilarities arise from the composite nature,which gives rise to the sequential activation of different micromechanisms,in the ARBed microstructure.
Cyclic deformation,ECAP (Equal Channel Angular Pressing),ARB (Accumulative Roll-Bonding),cyclic softening ratio,grain coarsening
Z.R.Wang Charles Kwan
Department of Materials Science and Engineering,University of Toronto,184 College St.,Toronto,Canada,M5S 3E4
国际会议
The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)
上海
英文
16-23
2011-05-22（万方平台首次上网日期，不代表论文的发表时间）