Grain Refinement of High-Purity FCC Metals Using Equal-Channel Angular Pressing

Z. Horita; Kaoru Kishikawa; Keiichi Kimura; Kohei Tatsumi; Terence G. Langdon

doi:10.4028/www.scientific.net/MSF.558-559.1273

Paper Titles

Grain Growth Behavior and Characteristics of Multiphase Ceramic Composites Fabricated by Organic-Inorganic Solution Technique
p.1249

Devitrification and High Temperature Properties of Mineral Wool
p.1255

Evolution of the Microstructure in Electrochemically Deposited Copper Films at Room Temperature
p.1261

Effect of Grain Orientation on the Abnormal Grain Growth with Magetoplumbite Crystal Structure
p.1265

Grain Refinement of High-Purity FCC Metals Using Equal-Channel Angular Pressing
p.1273

Abnormal Grain Growth during Annealing in Nanocrystalline Fe-Ni Alloys
p.1279

The Processing of Ultrafine-Grained Materials Using High-Pressure Torsion
p.1283

Effect of Annealing on the Microstructure Change and Strength of Irradiated Quasi-Nano-Filamentary Copper-Silver Composites
p.1295

X-Ray Diffraction Studies of Grain Growth in an Ultra-fine Grained 6060 Aluminium Alloy
p.1299

HomeMaterials Science ForumMaterials Science Forum Vols. 558-559Grain Refinement of High-Purity FCC Metals Using...

Grain Refinement of High-Purity FCC Metals Using Equal-Channel Angular Pressing

Abstract:

Equal-channel angular pressing (ECAP) is a valuable technique for refining grain sizes to the submicrometer or the nanometer range. This study explores the reason for the difference in the grain refining behavior between pure Al and pure Cu. First, very high purity levels were adopted in order to minimize any effects of impurities: 99.999% for Al and 99.99999% for Cu. Second, high purity (99.999%) Au was also used in order to examine the effect of stacking fault energy. All three pure metals were subjected to ECAP and microstructural observations and hardness measurements were undertaken with respect to the number of ECAP passes. It is concluded that the stacking fault energy plays an important role and accounts for the difference in the grain refining behavior in the ECAP process.