Asymmetric slip trace formation in tension/compression cyclic deformation of biomedical Co-Cr-Mo-N alloy with negative stacking fault energy

作者：Mitsunobu Takuya; Koizumi Yuichiro^*; Lee Byoung Soo; Chiba Akihiko

来源：Scripta Materialia, 2014, 74: 52-55.

DOI：10.1016/j.scriptamat.2013.10.015

• Biomedical cobalt-chromium-molybdenum alloy
• Martensitic phase transformation
• Deformation structure
• Atomic force microscopy (AFM)
• Mechanical properties

Surface relief formation of a biomedical Co-Cr-Mo-N (CCMN) alloy under tension/compression cyclic deformation has been investigated by in situ optical microscopy, atomic force microscopy and electron backscattering diffraction analysis. The formation of slip traces exhibited tension/compression asymmetry, resulting in unique surface reliefs. This is attributed to the motion of isolated Shockley partial dislocations in the metastable gamma-face-centered cubic phase, in which the stacking fault energy is negative.

• 出版日期2014-3