Dislocation Density of FCC Metals Processed by ARB

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Miyajima, Y.^1 ; Ueda, T.^1 ; Adachi, H.^2 ; Fujii, T.^3 ; Onaka, S.^1 ; Kato, M.^1

Department of Materials Science and Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259-J2-63, Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan^1

Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, Shosha, 2167 Himeji 671-2280, Japan^2

Department of Metallurgy and Ceramics Science, Graduate School of Engineering, Tokyo Institute of Technology, 2-12-1-S8-7, Ookayama, Meguro-ku, Tokyo 152-8551, Japan^3

关键词: Accumulative roll bonding;    Dislocation densities;    FCC metals;    Measurement methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012138/pdf
DOI  :  10.1088/1757-899X/63/1/012138

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Accumulative roll bonding (ARB) was applied to three FCC metals, such as Al, Cu and Ni. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) were made to evaluate dislocation density ρ of the ARB processed FCC metals. The values of ρ of ARB processed Cu and Ni increased rapidly after the first ARB cycle, and then, tend to saturate after the following cycles. The evaluated values of ρ of both ARB 8-cycled Cu and Ni using DSC were around 2×1015m-2. Whereas, those using XRD were around 5×1014m-2(for Cu) and 3×1014m-2(for Ni). Although the ρ values depend on the measurement methods, the trends that DSC values are about an order of magnitude higher than XRD values seem to be common. In the case of Al, dislocation density evaluated using XRD increased to about 1×1013m-2at the first ARB cycle, and then gradually decreased to about 1×1012m-2with increasing number of ARB cycles.