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Ductile Titanium Alloy with Low Poisson's Ratio
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Ductile Titanium Alloy with Low Poisson's Ratio Y. L. Hao, S. J. Li, B. B. Sun, M. L. Sui, and R. Yang Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China (Received 28 January 2007; published 25 May 2007) We report a ductile -type titanium alloy with body-centered cubic (bcc) crystal structure having a low Poisson's ratio of 0.14. The almost identical ultralow bulk and shear moduli of ~24 GPa combined with an ultrahigh strength of ~0.9 GPa contribute to easy crystal distortion due to much-weakened chemical bonding of atoms in the crystal, leading to significant elastic softening in tension and elastic hardening in compression. The peculiar elastic and plastic deformation behaviors of the alloy are interpreted as a result of approaching the elastic limit of the bcc crystal under applied stress. [ Last edited by luo.henry on 2008-4-25 at 15:45 ] |
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