Influence of High-Frequency Impacting and Rolling on Friction and Wear Behavior of 2A12 Aluminum Alloy

摘要

High-frequency impacting and rolling (HFIR) as a new surface strengthening treatment has been paid more and more attention. 2A12 aluminum alloy was processed by HFIR with different parameters. The effect of HFIR on friction and wear behavior of 2A12 aluminum alloy was investigated. Results showed that the surface roughness value of HFIR processed samples was decreased compared to the original samples. Compared with the original samples, the maximum surface microhardness of the HFIR treated samples ultimately increased by about 12.4%. The depth of hardened layer of about 135 mu m can be obtained by HFIR treatment. The wear mechanisms of the HFIR-free samples were oxidation wear, abrasive wear and severe adhesive wear. The wear mechanisms of the HFIR-treated samples were abrasive wear, light adhesive wear and oxidation wear. Experimental results indicated that HFIR treatment is an efficient way to enhance the wear resistance of the 2A12 aluminum alloy.