• Title/Summary/Keyword: Accumulativee rolling-bonding (ARB)

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An Investigation of Sliding Wear and Microstructural Evolution of Ultra-Fine Grained Pure Al Fabricated by ARB Process (누적압연접합(Accumulative Roll-Bonding, ARB)에 의한 Al의 결정립 미세화와 마모 특성 연구)

  • Park K.S.;Lee T.O.;Kim Y.S.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2000.10a
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    • pp.21-24
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    • 2000

  • Ultra-fine grains were produced in pure Al using an Accumulative Rolling-Bonding (ARB) process. After several cycles of the ARB process, pure Al sheets were filled with the ultra-fine grains whose diameters were several hundred nano-meters. With ARB cycles, the nature of grain boundaries of the ultra-fine grains changed from diffusive sub-boundaries to well-defined high angle boundaries. After 7 cycles, ultra-fine polycrystals with large misorientations between neighboring grains were obtained. Sliding wear tests using a pin-on-disk type wear tester were co ducted on the ultra-fine grained pure Al. Wear rates of pure Al increased with the increase of ARB cycle numbers in spite of the increase in hardness. Worn surfaces and cross-sections were examined with optical microscopy (OM) and scanning electron microscopy (SEM) In investigate the wear mechanism of the ultra-fine grained pure Al.

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