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Proceedings of ABM Annual Congress

ISSN 2594-5327

65º Congresso ABM — vol. 65, num.65 (2010)

Title

STRUCTURE-PROPERTY RELATIONSHIP OF ULTRAFINE GRAINED TITANIUM-ALUMINUM-NIOBIUM ALLOYS PROCESSED BY ACCUMULATIVE ROLL BONDING

STRUCTURE-PROPERTY RELATIONSHIP OF ULTRAFINE GRAINED TITANIUM-ALUMINUM-NIOBIUM ALLOYS PROCESSED BY ACCUMULATIVE ROLL BONDING

Authorship

Acoff, Viola

Acoff, Viola
Acoff, Viola

I am this author

DOI

10.5151/2594-5327-39515

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Abstract

The severe plastic deformation process of accumulative roll bonding (ARB) was used to process ultrafine grained Ti-Al and Ti-Al-Nb alloys from elemental titanium, aluminum, and niobium foils. The multi-layered foils were subjected to various ARB cycles that consisted of repeated cold rolling with interspersed folding of the foils. The structure-property relationship between the number of ARB cycles and the resulting grain size was investigated and characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), x-ray diffraction (XRD), tensile testing and microhardness testing. TEM analysis showed the formation of ultrafine, submicron grains as a result of increasing ARB cycles. The reaction kinetics of solid-state phase transformations that occurred after annealing were also investigated as a function of ARB cycles. A relationship between the grain size and reaction kinetics was developed.

 

The severe plastic deformation process of accumulative roll bonding (ARB) was used to process ultrafine grained Ti-Al and Ti-Al-Nb alloys from elemental titanium, aluminum, and niobium foils. The multi-layered foils were subjected to various ARB cycles that consisted of repeated cold rolling with interspersed folding of the foils. The structure-property relationship between the number of ARB cycles and the resulting grain size was investigated and characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), x-ray diffraction (XRD), tensile testing and microhardness testing. TEM analysis showed the formation of ultrafine, submicron grains as a result of increasing ARB cycles. The reaction kinetics of solid-state phase transformations that occurred after annealing were also investigated as a function of ARB cycles. A relationship between the grain size and reaction kinetics was developed.

Keywords

The severe plastic

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How to refer

Acoff, Viola. STRUCTURE-PROPERTY RELATIONSHIP OF ULTRAFINE GRAINED TITANIUM-ALUMINUM-NIOBIUM ALLOYS PROCESSED BY ACCUMULATIVE ROLL BONDING , p. 5575-5575. In: 65º Congresso ABM, Rio de Janeiro, 2010.
ISSN: 2594-5327 , DOI 10.5151/2594-5327-39515