About this Abstract |
Meeting |
2017 TMS Annual Meeting & Exhibition
|
Symposium
|
High Entropy Alloys V
|
Presentation Title |
A Highly Fracture and Fatigue Resistant Al0.3CoCrFeNi High Entropy Alloy |
Author(s) |
, Yunzhu Shi, Peter K Liaw, Mingwei Chen, John J Lewandowski |
On-Site Speaker (Planned) |
John J Lewandowski |
Abstract Scope |
The fracture-toughness and fatigue-crack-growth behavior of the Al0.3CoCrFeNi high entropy alloy was determined. Microstructure examination revealed a single FCC phase structure. The notched and fatigue-precracked toughness values were significantly higher than that of those reported in the literature and comparable to a recent report on a single phase face-centered-cubic (fcc)-HEA that was deformation processed. Fatigue-crack-growth experiments in 3-point bending revealed high fatigue thresholds that decreased significantly with an increase in load ratio (R), while Paris law slopes exhibited metallic-like behavior at low R. Fatigue thresholds at all R were much higher than most conventional alloys. Additional experiments were conducted using compact-tension specimens to minimize load-point effects on the measurements. Fracture-surface examinations of the fatigue-crack-growth samples revealed ductile features at various regions of the fatigue curve, with some evidence of fatigue striations in the Paris law regime. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |