Enhanced Thermal Stability And Mechanical Properties of Ultrafine-Grained Aluminum Alloy

摘要：

The paper reports on microstructure, strength and fatigue of ultrafine-grained (UFG) samples of the Al-Cu-Mg-Si aluminum alloy processed by high pressure torsion (HPT) at various temperatures. Application of the HPT treatment led to strong grain refinement, as well as to a raise of the mean-root square strains and dynamic precipitation. In case of optimal HPT treatment the UFG samples have demonstrated the enhanced thermal stability, an increase in ultimate tensile strength in 2.5 times and enhancement in fatigue endurance limit by 20 % in comparison with coarse-grained alloy subjected to standard treatment. It is shown that the regime of the HPT treatment governs the volume fraction of precipitates and segregations, thereby affecting a grain size and thermal stability of ultrafine-grained structure.

作者: Rinat K.lslamgaliev Marina A.Nikitina Aidar F.Kamalov

作者单位: Institute of Physics of Advanced Materials,Ufa State Aviation Technical University,K.Marx St.12,Ufa 450000,Russia

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: 331-336

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）