mechanical and structural investigation of porous bulk metallic glasses
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2015
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Abstract
The intrinsic properties of advanced alloy systems can be altered by changing their microstructural features. Here, we present a highly efficient method to produce and characterize structures with systematically-designed pores embedded inside. The fabrication stage involves a combination of photolithography and deep reactive ion etching of a Si template replicated using the concept of thermoplastic forming. Pt- and Zr-based bulk metallic glasses (BMGs) were evaluated through uniaxial tensile test, followed by scanning electron microscope (SEM) fractographic and shear band analysis. Compositional investigation of the fracture surface performed via energy dispersive X-ray spectroscopy (EDX), as well as Auger spectroscopy (AES) shows a moderate amount of interdiffusion (5 at.% maximum) of the constituent elements between the deformed and undeformed regions. Furthermore, length-scale effects on the mechanical behavior of porous BMGs were explored through molecular dynamics (MD) simulations, where shear band formation is observed for a material width of 18 nm.
| Reference Key |
sarac2015metalsmechanical
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| Authors | ;Baran Sarac;Daniel Sopu;Eunmi Park;Julia Kristin Hufenbach;Steffen Oswald;Mihai Stoica;Jürgen Eckert |
| Journal | seminars in cancer biology |
| Year | 2015 |
| DOI |
10.3390/met5020920
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