The heterogeneity of persistent slip band nucleation and evolution in metals at the micrometer scale
Abstract
Metal fatigues when repeatedly loaded, ultimately failing when cracks form and propagate through the material. Lavenstein et al. studied the origins of this process in nickel. Using high-resolution observations, they tracked how dislocations evolved into microstructural features called persistent slip bands that preceded crack formation. The evolution of tangles of dislocations to a more regularly spaced pattern form the basis for the persistent slip bands and provide a road map for understanding fatigue cracking in metals.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 09, 2020
- Source ID
- 10.1126/science.abb2690
Entities
People
- Dylan Madisetti
- Jaafar A El-Awady
- Steven Lavenstein
- Yejun Gu
Organizations
- Air Force Office of Scientific Research
- Johns Hopkins University
- National Science Foundation