TEM Investigations of Titanium Processed by ECAP Followed by Cold Rolling

Abstract:

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Conventional coarse grained (CG) commercial pure (CP) Ti Grade 2 was studied after cold rolling (CR) at room temperature, and after equal channel angular pressing (ECAP) at 450° C followed by CR, by transmission electron microscopy (TEM) methods. CR of the CG material leads to a microstructure showing initially twins with (0112) type and later subgrains separated by lowangle grain boundaries. CR carried out after ECAP yields the fragmentation of fine grains (300 – 800 nm) mostly bounded by high-angle boundaries into elongated subgrains (~ 100 nm). It was shown with in-situ annealing experiments in the TEM that this microstructure is thermally stable up to a temperature of 450° C. Tensile tests showed that the combination of ECAP with CR has the potential to produce at the same time high strength (941 MPa) and high ductility (16.7%).

Info:

Periodical:

Materials Science Forum (Volumes 503-504)

Edited by:

Zenji Horita

Pages:

805-810

DOI:

10.4028/www.scientific.net/MSF.503-504.805

Citation:

B. Mingler et al., "TEM Investigations of Titanium Processed by ECAP Followed by Cold Rolling", Materials Science Forum, Vols. 503-504, pp. 805-810, 2006

Online since:

January 2006

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Price:

$35.00

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