Quasi-static and dynamic compression behaviors of metallic glass matrix composites. (May 2015)

• Record Type: Journal Article
• Authors: Wang, Y.S.; Hao, G.J.; Ma, R.; Zhang, Y.; Lin, J.P.; Wang, Z.H.; Qiao, J.W.
• Is Part Of: Intermetallics. Volume 60(2015:May)
• Page Start: 66
• Page End: 71
• Publication Date: 2015-05
• Subjects: A. Metallic glasses -- B. Mechanical properties -- B. Yield stress -- B. Fracture -- C. Severe plastic deformation -- F. Mechanical testing; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2014.10.018
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: Compressive tests were conducted on metallic glass matrix composites at a series loading rates. It was found that mechanical properties of the composite, e.g. yielding stress and plasticity, have a week dependence on strain rates of 4.0 × 10 −4 s −1 –4.0 × 10 −1 s −1 . Four composites were tested at a constant strain rate of 2.3 × 10 s −1 to uncover the dynamic deformation behaviors. Compared with the quasi-static case, the yielding strength increased under dynamic loading rate, but the plasticity decreased significantly. On the other hand, the dynamic compressive has closely relation with the dendrite size and volume fraction. The decreasing of the dendrite size and volume fraction leaded to the dynamic yielding strength increased but the plasticity decreased. For a same composite, e.g. T1 alloy, the yielding strengths increased slightly but fracture strain decreased with increasing of dynamic strain rates. Highlights: Strain rate effect on mechanical properties was investigated in Ti-based MGM composites. The mechanical properties of the composite have a week dependence on quasi-static strain rates. In contrast to quasi-static case, the dynamic yielding strength increased but plasticity decreased. The dynamic mechanical behaviors related with the dendrite size and volume fraction.