A method for evaluating the mechanical performance of thin-walled titanium tubes

MacKenzie, P.M. and Walker, C.A. and McKelvie, J.K. (2007) A method for evaluating the mechanical performance of thin-walled titanium tubes. Thin-Walled Structures, 45 (4). pp. 400-406. ISSN 0263-8231

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    Abstract

    A method which was developed to compare the stress-strain properties of three types of thin-walled, commercially pure titanium tubes is presented. The tubes were of types intended for use in large heat-exchanger applications and were to be subjected to significant plastic deformation during subsequent assembly processes. It had been anticipated that small differences in chemical composition and tube-drawing treatment would produce quite different characteristics. It is known that the properties of titanium can exhibit considerable degrees of anisotropy, especially for wrought products; although axial properties of the materials could be evaluated using standard test equipment and procedures, a novel testing system had to be designed to allow the circumferential properties to be assessed. Significant differences between tube types were observed and anisotropic material behaviour was apparent.