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Journal Article
METAL, HEAL THYSELF
2023
Overview
Metals are critical in a huge range of structures and products--from bridges to engines, from airplanes to solder joints in electronic devices. But metals are susceptible to fatigue damage. Over time, stress and motion create microscopic fissures that enlarge and spread until the metal breaks. While researchers have concocted some types of self-healing concrete and plastic, self-healing metal was always considered science fiction. Until a decade ago. That's when Michael Demkowicz, professor of materials science and engineering at Texas A and M University, used computer simulations to theorize that, under certain conditions, the microscopic cracks formed in metal by wear and tear would reseal. Now, by accident, Sandia National Laboratories researchers have witnessed the phenomenon. The investigators were using an electron microscope to observe how cracks formed as the team repeatedly tugged on the ends of a nanoscale slice of platinum.
Publisher
AMERICAN SOCIETY FOR ENGINEERING EDUCATION
