Nanostructure Formation and Amorphization in Intermetallic Compounds by Severe Plastic Deformation

摘要：

Process of nanostructure formation and amorphization by high pressure torsion (HPT) were studied for various intermetallic compounds. In ZrCu after HPT deformation, optical microscopy revealed that numerous shear bands formed running nearly parallel to the shear direction. Partial amorphization was confirmed by X-ray diffraction and TEM observations. Detailed TEM observations revealed localized amorphization within the nano-scale shear bands. For HPT deformation of zone-melted ZrsoduoAlio the preferential amorphization of ZrCu phase was observed. On the contrary, amorphization was not observed for Ni3Al even after HPT deformation of 100 turns; the sample remained to be disordered nanocrystalline of about 50 nm. The process and mechanism of the grain refinement and amorphization will be compared and discussed for these intermetallic compounds.

作者: Koichi Tsuchiya Octav Ciuca

作者单位: National Institute for Materials Science,Sengen 1-2-1,Tsukuba Ibaraki 305-0047,Japan University of T National Institute for Materials Science,Sengen 1-2-1,Tsukuba Ibaraki 305-0047,Japan

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: 17-24

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）