کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1579555 | 1514829 | 2010 | 6 صفحه PDF | دانلود رایگان |
Cu46Zr47Al7 bulk metallic glass (BMG) alloys with different microstructure were fabricated by adjusting the casting size. For the monolithic BMG with different diameters, the measured plasticity decreased with the increase of sample size and was mainly due to the sliding of two undeveloped parts along main shear band. Excellent compression plastic strain (∼13.2%) was obtained for the marginal BMG containing in situ nanocrystals with sample size up to 3.5 mm in diameter where multiple shear bands formed. It is suggested that failure of BMG samples will occur when the temperature rise in shear layer reaches a critical value. The temperature rise is closely related to the sample size and stress drop, moreover, it can be controlled through adjusting final stress drop (via sample size) and increment rate of stress drop (via microstructure), resulting in enhanced plasticity.
Journal: Materials Science and Engineering: A - Volume 527, Issues 16–17, 25 June 2010, Pages 4122–4127