Environmental Fatigue of 7075-T6 Aluminum Alloy

Ryuichiro Ebara; A.J. McEvily

doi:10.4028/www.scientific.net/KEM.452-453.13

Paper Titles

Committees and Preface

Anisotropic Fracture Behaviour of Progressively Drawn Pearlitic Steel
p.1

Fatigue Crack Growth in Adhesively Bonded Joints with Intermittent Impacts
p.5

Finite Element Analysis of Fretting Fatigue Using Different Pad‘s Geometries and Compression Forces
p.9

Environmental Fatigue of 7075-T6 Aluminum Alloy
p.13

Lap Strength of Headed Steel Reinforcements with Confinement
p.17

Effectiveness of Linear Notch Mechanics under the Condition of Small Scale Yielding
p.21

Bending Fatigue Strength Evaluation of Notched Structural Steel Sheet Repaired by Bolt
p.25

Damage Identification Using Lamb Waves
p.29

HomeKey Engineering MaterialsKey Engineering Materials Vols. 452-453Environmental Fatigue of 7075-T6 Aluminum Alloy

Environmental Fatigue of 7075-T6 Aluminum Alloy

Abstract:

The fatigue lifetime of the aluminum alloy 7075-6 depends upon the cyclic stress amplitude and the environment. At an R value of 0.05, and a maximum stress of 400 MPa the lifetime in vacuum is an order of magnitude greater than that in air, but interestingly at a maximum stress of 275 MPa, the lifetime in vacuum is only three times that in air. It was noted that well defined striations were observed in air, whereas striations were absent in vacuum, instead indications of ductile rupture were observed. The mechanism of fatigue crack initiation and propagation behavior as influenced by the environment is discussed.