|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Materials in Dental and Orthopedic Applications
||A Novel Strengthening Strategy Using Stacking Faults for Biomedical Co–Cr–Mo Alloys
||Kenta Yamanaka, Manami Mori, Shigeo Sato, Akihiko Chiba
|On-Site Speaker (Planned)
We recently proposed a novel processing strategy for achieving high-strength biomedical Co–Cr–Mo alloys: multipass “low-strain-per-pass” thermomechanical processing. The objective of this study is to fully understand the relevant strengthening mechanisms. Co–28Cr–6Mo–0.13N (mass%) alloy specimens prepared by multipass hot rolling showed an increase in the dislocation density with an increase in hot-rolling reduction. Furthermore, an advanced X-ray diffraction line-profile analysis based on extended convolutional multiple whole profile fitting (eCMWP) quantitatively revealed for the first time that a dramatic increase in stacking faults occurs during the multipass hot-rolling process and that the contribution of accumulated stacking faults successfully explains the significant increase in the yield stress with greater height reduction of the hot-rolled alloy. These results indicate the possibility of “stacking fault strengthening” and will help in guiding the design/manufacturing strategy for high-strength Co–Cr–Mo alloys for highly durable medical devices.
||Planned: Supplemental Proceedings volume