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Micro-mechanical and tribological properties of aluminum-magnesium nanocomposites processed by high-pressure torsion

Title
Micro-mechanical and tribological properties of aluminum-magnesium nanocomposites processed by high-pressure torsion
Author
장재일
Keywords
High-pressure torsion; Metal matrix nanocomposite; Nanoindentation; Post-deformation annealing; Tribology
Issue Date
2017-01
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 684, page. 318-327
Abstract
High-pressure torsion (HPT) is one of the major severe plastic deformation (SPD) procedures where bulk metals, in the shape of a disk, achieve exceptional grain refinement at ambient temperatures. HPT has been applied for the consolidation of metallic powders and the bonding of machining chips whereas there are very limited reports examining the application of HPT for the production of new metal systems and the formation of nanocomposites. Accordingly, this investigation was initiated to evaluate the potential for the formation of a metal matrix nanocomposite (MMNC) by processing two commercial metal disks of an Al-1050 alloy and a ZK60 magnesium alloy through HPT under 6.0 GPa for 20 turns at room temperature. Evolutions in microstructure, mechanical properties including hardness and plasticity and the tribological properties were examined in the MMNC region of the processed Al-Mg system. The significance of post-deformation annealing (PDA) at 573 K for 1 h was investigated by the change in microstructure and the enhancement in mechanical properties and wear resistance of the HPT-processed MMNC. This study demonstrates the promising feasibility of using HPT to fabricate a wide range of hybrid MMNCs from simple metals and for applying PDA for further improvement of the essential mechanical and tribological properties in the synthesized alloy systems.
URI
https://www.sciencedirect.com/science/article/abs/pii/S0921509316315696?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/105169
ISSN
0921-5093; 1873-4936
DOI
10.1016/j.msea.2016.12.067
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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