کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1448095 | 988664 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Microstructural heterogeneities governing the deformation of Cu47.5Zr47.5Al5 bulk metallic glass composites Microstructural heterogeneities governing the deformation of Cu47.5Zr47.5Al5 bulk metallic glass composites](/preview/png/1448095.png)
Cu47.5Zr47.5Al5 rods with different volume fractions of crystalline B2 CuZr phase were prepared by copper mould casting. Based on microstructural investigations a solidification mechanism is proposed for these bulk metallic glass (BMG) composites. The composite microstructure enhances the compressive plasticity (plastic strain up to 14%) and both plastic strain as well as yield strength scale with the crystalline volume fraction. Yield strength and fracture strain were successfully calculated using a strength model, which considers percolation and an empirical three microstructural element body approach, respectively. Furthermore, B2 CuZr was synthesized by means of a thermal cycling treatment and uniaxial compression tests were carried out at room temperature. The intrinsic work-hardenability caused by a martensitic transformation has strong implications on the deformation behaviour of the investigated Cu47.5Zr47.5Al5 BMG composites.
Journal: Acta Materialia - Volume 57, Issue 18, October 2009, Pages 5445–5453