کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1575055 | 1514737 | 2014 | 8 صفحه PDF | دانلود رایگان |

Strain rate effect on the mechanical behavior of a Cu48Zr48Al4 bulk metallic glass composite (BMGC) containing a B2-CuZr phase was investigated under quasi-static and dynamic compression. It was found that the CuZr-based BMGC exhibits remarkable strain-rate-softening, although the deformation-induced martensitic transformation of the B2-CuZr phase similarly occurred under both quasi-static and dynamic loading. The significant transformation-induced plasticity (TRIP) and pronounced work-hardening characteristic of the BMGC upon quasi-static loading were found to be considerably deteriorated under dynamic loading. Furthermore, the BMGC alloy was aboratively heat-treated into austenite and martensite states mainly containing the B2-CuZr phase and the B19′-CuZr phase respectively. By comparing the strain-rate responses of the mechanical behaviors in the austenite and martensite states, it was shown that the B2-CuZr phase itself presents dynamic softening due to the deformation-induced martensitic transformation with heat release effect. The dynamic softening characteristic of the B2-CuZr phase limits its contribution to the potential mechanical behavior of the CuZr-based BMGC containing the B2-CuZr phase under dynamic loading.
Journal: Materials Science and Engineering: A - Volume 606, 12 June 2014, Pages 268–275