A D V A N C E D M A T E R I A L S & P R O C E S S E S | O C T O B E R 2 0 2 2 3 7 7 FEATURE and excellent superelasticity have been achieved simultaneously in the same alloy. The combination of low Young’s modulus and high corrosion resistance makes the CCAS alloys suitable for application such as artificial hip or knee joints, bone plates, and dental implants. The CCAS alloys also exhibit superior superelastic behavior, making them promising candidates for applications such as guide wires and vascular stents. ~SMST For more information: Xiao Xu, assistant professor, Tohoku University, Aobayama 6-6-02, Sendai 980-8579, Japan, xu@ material.tohoku.ac.jp. Acknowledgments This work was supported by the Grants-in-Aid for Research from the Japan Society for the Promotion of Science (grants JP19H02412, JP20KK0108, JP20J11238, and 22H01753) and the Czech Science Foundation (grant 2012624S). References 1. Q.Z. Chen, et al., Metallic Implant Biomaterials, Mat. Sci. Eng. R, 87: 1-57, 2015. 2. R. Huiskes, et al., The Relationship Between Stress Shielding and Bone Resorption Around Total Hip Stems and the Effects of Flexible Materials, Clin. Orthop. Relat. Res., 274: 124-134, 1992. 3. M. Tane, et al., Peculiar Elastic Behavior of Ti-Nb-Ta-Zr Single Crystals, Acta Mater., 56: 2856-2863, 2008. 4. T. Odaira, et al., Flexible and Tough Superelastic Co-Cr Alloys for Biomedical Applications, Adv. Mater., 34: 2202305, 2022. 5. X. Xu, et al., Cooling-Induced Shape Memory Effect and Inverse Temperature Dependence of Superelastic Stress in Co2Cr(Ga,Si) Ferromagnetic Heusler Alloys, Appl. Phys. Lett., 103: 164104, 2013. 6. K. Hirata, et al., Martensitic Transformation and Superelasticity in Off-Stoichiometric Co2Cr(AlSi) Heusler Alloys, J. Alloys Compd., 642: 200-203, 2015. 7. T. Omori, et al., Abnormal Grain Growth Induced by Cyclic Heat Treatment, Science, 341: 1500-1502, 2013. 8. J.F. Nye, Physical Properties of Crystals: Their Representation by Tensors and Matrices, Oxford: Clarendon Press, 1957. 9. Y. Ogawa, et al., A Lightweight Shape-Memory Magnesium Alloy, Science, 353: 368-370, 2016. 10. J. Fu, et al., Novel Ti-Base Superelastic Alloys with Large Recovery Strain and Excellent Biocompatibility, Acta Bio- mater., 17: 56-67, 2015. 11. New Flexible and Tough Superelastic Metal Alloy Shows Promise in Biomedical Applications, Research News of Tohoku University, https://www.tohoku.ac.jp/en/press/new_ flexible_and_tough_superelastic_metal_alloy.html, 27 May 2022. Fig. 4 — Comparison of the CCAS alloys with conventional metallic biomaterials: (a) Young’s modulus vs. wear resistance; and (b) recoverable strain vs. corrosion resistance. 8 9 Interested in advertising with the ASM International Organization on Shape Memory and Superelastic Technologies? Contact Kelly “KJ” Johanns at kelly.johanns@asminternational.org.
RkJQdWJsaXNoZXIy MTYyMzk3NQ==