Equal Channel Angular Pressing and Torsion of Pure Al Powder in Tubes

Abstract:

In this work, a new severe plastic deformation technique for preparing bulk fine-grained materials has been developed to achieve higher plasticity of powder materials. This novel technique, named Equal Channel Angular Pressing and Torsion (ECAPT), combines two severe plastic deformation methods: equal channel angular pressing and twist extrusion. With the designed ECAPT set-up, pure Al powder particles were successfully consolidated into full dense bulk material with fine grains at a lower deformation temperature (200°C) by Powder in Tubes-Equal Channel Angular Pressing and Torsion (PITS-ECAPT). After two passes of PITS-ECAPT, the microstructures at X, Y and Z planes of each sample were all sheared and elongated along a certain direction with fine banded structures; the grains were greatly squashed and refined with an average grain size of ~ 11.90µm; the deformed sample reached the full density; the micro-hardness and yield strength achieved 49.9kg/mm2 and 155Mpa respectively, which were significantly higher than those of as-cast annealed pure Al and pure Al powder sintered materials.

• Periodical: Advanced Materials Research (Volumes 97-101)
• Pages: 1109-1115
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.97-101.1109
• Online since: March 2010
• Authors: Xiao Xi Wang, Ke Min Xue, Ping Li, Zhan Li Wu, Qi Li
• Keywords: Microstructure, Powder in Tubes-Equal Channel Angular Pressing, Powder in Tubes-Equal Channel Angular Torsion, Property Analysis, Pure Al Powder Particle

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