Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 07, 2017 - October 09, 2017
The fatigue damage behavior of Zr12Ti2Cu25Al12 (ZT1) bulk metallic glass (BMG) was investigated based on the stress-life approach and the damage tolerance approach. The ZT1 exhibits the highest fatigue endurance limit among all monolithic BMGs, with a fatigue limit of σa=441 MPa under four-point-bending load, or ～0.27 of its tensile strength. The relation between the range of stress intensity factor (ΔK) and the crack-growth rate (da/dN) was also determined. ZT1 shows a fatigue threshold, ΔKth, of 2.8 MPa√m, which appears to be related to its atomic topological structure.
