Abstract
Electron fractographic studies have been made on peak-aged and overaged Al-Zn-Mg alloy specimens tested in low stress fatigue. The distinct and obvious difference in microscopic features on the fracture surfaces of two specimens indicates that a peak-aged material does not overage in the crack tip plastic zone. The microfeatures on the overaged specimen further suggest that fatigue cracks at intermediate and high values of Δk in this material may have grown by a mechanism which does not result in formation of fatigue striations.
Full Text
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call