Dispersion of the Structure in Al-based Alloys by Different Methods of Severe Plastic Deformation

摘要：

Structural and phase transformations in V95 (type of A7075) alloy upon high pressure torsion (HPT) up to high strain and upon dynamic channel angular pressing (DCAP) were studied using electron microscopy (TEM, SEM) and x-rays diffraction. It was established that the nanostructure with average grain size of 80-55 nm and hardness value of 2.5 GPa is formed by HPT at strain of e=5.5-6.4. It was shown the hardening metastable phase MgZn2 precipitates from supersaturated a-solid solution during dynamic deformation aging; its quantity grows with increasing of strain. Ultra fine grained structure with high-angle boundaries is formed in V95 alloy after already 2 cycles of DCAP. The average grain size is 200 nm in DCAP samples.

作者: I.Brodova I.Shirinkina A.Petrova

作者单位: Institute of Metal Physics,Ural Division,Russian Academy of Sciences,18 S.Kovalevskaya St.,Yekaterinburg,620990,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: 517-521

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）