Prediction of the Tension/Compression Asymmetry of ECAP Processed FCC Material Using an Integrated Model Based on Dislocation and Back-Stress

摘要：

In our recent work, a new integrated model was proposed to describe the back-stress evolution based on the dislocation substructure and texture. By relating the back-stress to the dislocation density in cell walls and in the cell interior, this model is able to capture the back-stress evolution of ECAP processed pure aluminium. In this paper, the model is used for another FCC material, namely copper. The aim is to check whether this model is able to predict the tension/compression asymmetry (due to the back-stress) of copper. The results show that this is indeed the case and it is also found that the strain rate ratio proposed in our previous work 1 is a function of the dislocation density ratio.

作者: Enze Chen Laurent Duchene Anne Marie Habraken BertVerlinden

作者单位: Katholieke Universiteit Leuven,Department of Metallurgy and Materials Engineering,Kasteelpark Arenbe FNRS Fonds de la Recherche Scientifique,University of Liege,ARGENCO,Chemin des Chevreuils 1,B-4000 L

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 961-966

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）