|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||On the Fracture Toughness and Fatigue Strength of Ni-based Glasses
||Bernd Gludovatz, Edwin H Chang, Mingxi Zheng, Jong H Na, Maximilien E Launey, Marios D Demetriou, William L Johnson, Robert O Ritchie
|On-Site Speaker (Planned)
The excellent combination of properties like high strength, low stiffness, and large elastic strain limits make bulk-metallic glasses (BMGs) candidate materials for many structural applications. One of the main drawbacks for their use in engineering fields are the often limited dimensions of casts of plates and rods and their somewhat expensive production costs. In terms of damage tolerance, BMGs now show reasonably high fatigue limits whereas strength and toughness behave generally mutually exclusive with fracture toughness values often unacceptably low (<10 MPa.m^1/2) when strength levels exceed 2 GPa. Here, we report on a cost-effective Ni-based BMG of 2.5 GPa strength that can be processed with a centimeter-thick cross section and shows a plane strain fracture toughness of ~27 MPa.m^1/2. We compare the glass’ fatigue endurance limit in both air and 0.5M NaCl corrosive environment to another Ni-glass with higher Cr-content and other BMGs like Vit105.
||Planned: Supplemental Proceedings volume