Wear characteristics of severely deformed aluminum sheets by accumulative roll bonding (ARB) process
Wear behavior of severely deformed aluminum sheets by accumulative roll bonding (ARB) process was characterized using a pin on disc wear machine at different conditions. The sheets were processed up to eight ARB cycles in order to induce a high strain ({approx} 6.4) to the samples. EBSD results showed that after eight cycles of ARB, sheets were found to contain ultrafine grains with high fraction of high angle grain boundaries. Wear experiments were conducted under different loading and operating conditions, including dry and immersion lubrication, and rotation speeds. Wear was continuously monitored by measuring the wear rates and morphologies of worn surfaces by scanning electron microscope (SEM). Contrary to expectation, the wear resistance of the ARBed Al sheets was less than the non-processed sheets. Wear rates of the ARBed Al sheets increased by increasing wear load and rotation speed, while, immersion lubrication decreased the wear rate significantly. Based on the observation and results, a model for the wear of the ARBed Al was proposed. - Research Highlights: {yields}The wear rate of the ARBed Al was higher than that of the non-processed alloy. {yields}This unexpected behavior was related to the low strain hardening capability and evolution of the ARB subsurface microstructure during the wear process. {yields}Sliding wear of the ARBed Al proceeded by surface deformation, and progressed by delamination of the deformed surface layer. {yields}The wear rate of ARBed Al increased by increasing applied load and sliding speed.
- OSTI ID:
- 22063645
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Journal Issue: 1 Vol. 62; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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