Processing of Ultrafine Grained Cu-30%Zn Alloy through Severe Plastic Deformation Using Accumulative Roll Bonding

Sayed Ghafar Hashemi; Beitallah Eghbali

doi:10.4028/www.scientific.net/MSF.667-669.571

Paper Titles

Microstructure and Mechanical Properties of Ultra-Fine Grain AZ80 Alloy Processed by Back Pressure Equal Channel Angular Pressing
p.547

Nanostructure Evolution in an Austenitic Stainless Steel Subjected to Multiple Forging at Ambient Temperature
p.553

Mechanical Properties and Microstructures of Severely Plastic Deformed Pure Titanium by Mechanical Milling and Spark Plasma Sintering
p.559

The Formation of Submicrometer Scale Grains in a Super304H Steel during Multiple Compressions at 700°C
p.565

Processing of Ultrafine Grained Cu-30%Zn Alloy through Severe Plastic Deformation Using Accumulative Roll Bonding
p.571

The Evolution of Texture in AA 1050 Alloy Deformed by Equal-Channel Angular Pressing
p.577

Production of Bulk Ultrafine Grained Steel through Severe Plastic Deformation
p.583

Anomalous Property Evolution during Annealing in HPTed SUS 304 Austenitic Stainless Steel
p.589

Grain Refinement and Dispersion Precipitation of I-Phase in Mg-Zn-Y Alloy Processed by ECAP
p.593

HomeMaterials Science ForumMaterials Science Forum Vols. 667-669Processing of Ultrafine Grained Cu-30%Zn Alloy...

Processing of Ultrafine Grained Cu-30%Zn Alloy through Severe Plastic Deformation Using Accumulative Roll Bonding

Abstract:

In the present research, the microstructural features of ultrafine grained Cu-30 Zn alloy via ARB at room temperature were investigated by X-ray diffraction peak profile analysis. The character of dislocations was determined by analyzing the dislocation contrast factors. The average contrast factors for the different reflections obtained by determination of the type of dislocations and Burgers vectors in crystals. Also, using the modified Williamson–Hall and Warren–Averbach procedure size parameters, the effective outer cut-off radius and density of dislocations were determined. Assuming that the grain size distribution is log-normal, the median and the variance of the size distribution of sub grains were obtained. It was found that the crystallite size is reduced substantially, while the dislocation density increases up to 2 cycles of ARB. After 2nd cycle, dislocation density decreases. This is attributed to the occurrence of dynamic restoration process which takes place during next ARB cycles.