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Microstructure evolution of accumulative roll bonding processed pure aluminum during cryorolling

Journal Article


Abstract


  • The microstructure evolution and mechanical properties of ultrafine-grained (UFG) Al sheets subjected to accumulative roll bonding (ARB) and subsequent cryorolling was studied. Cryorolling can suppress the dynamic softening of UFG Al sheets subjected to ARB at room temperature. After the third ARB pass, the grains are slightly refined as the number of ARB passes increases. However, the grains are significantly refined further during cryorolling. The grain size of 460 nm achieved after the third ARB pass is reduced to 290 nm after two cryorolling passes with total reduction ratio 80%. Sheets subjected to ARB + cryorolling show improved mechanical properties compared to only ARB-processed sheets due to a change in the fraction of high-angle boundaries and elongated grains. The deformation mechanism for ultrafine grains at room temperature is determined by grain boundary sliding or dislocation-based recovery, while it is governed by dislocation glide at cryogenic temperature.

Publication Date


  • 2016

Citation


  • Yu, H., Wang, H., Lu, C., Tieu, A. Kiet., Li, H., Godbole, A., Liu, X., Kong, C. & Zhao, X. (2016). Microstructure evolution of accumulative roll bonding processed pure aluminum during cryorolling. Journal of Materials Research, 31 (6), 797-805.

Scopus Eid


  • 2-s2.0-84962264602

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5576

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 797

End Page


  • 805

Volume


  • 31

Issue


  • 6

Place Of Publication


  • United States

Abstract


  • The microstructure evolution and mechanical properties of ultrafine-grained (UFG) Al sheets subjected to accumulative roll bonding (ARB) and subsequent cryorolling was studied. Cryorolling can suppress the dynamic softening of UFG Al sheets subjected to ARB at room temperature. After the third ARB pass, the grains are slightly refined as the number of ARB passes increases. However, the grains are significantly refined further during cryorolling. The grain size of 460 nm achieved after the third ARB pass is reduced to 290 nm after two cryorolling passes with total reduction ratio 80%. Sheets subjected to ARB + cryorolling show improved mechanical properties compared to only ARB-processed sheets due to a change in the fraction of high-angle boundaries and elongated grains. The deformation mechanism for ultrafine grains at room temperature is determined by grain boundary sliding or dislocation-based recovery, while it is governed by dislocation glide at cryogenic temperature.

Publication Date


  • 2016

Citation


  • Yu, H., Wang, H., Lu, C., Tieu, A. Kiet., Li, H., Godbole, A., Liu, X., Kong, C. & Zhao, X. (2016). Microstructure evolution of accumulative roll bonding processed pure aluminum during cryorolling. Journal of Materials Research, 31 (6), 797-805.

Scopus Eid


  • 2-s2.0-84962264602

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5576

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 797

End Page


  • 805

Volume


  • 31

Issue


  • 6

Place Of Publication


  • United States