Title

Effect of Microstructure on Fatigue Life and Fracture Morphology in an Aluminum Alloy

Abstract

The effect of grain refinement on the fatigue life of 7075Al alloy was evaluated using a subsize fatigue specimen. High-cycle fatigue of fine-grained 7075Al showed substantial improvement over the parent 7075-T6 material. This improvement in fatigue life is ascribed to retardation of crack propagation caused by grain boundaries acting as barriers and a crack closure effect due to crack deflection.

Department(s)

Materials Science and Engineering

Sponsor(s)

United States. Air Force. Office of Scientific Research

Keywords and Phrases

7075-T6; High-Cycle Fatigue; Microstructure; Small Crack Propagation; Subsize Fatigue Sample

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Elsevier, All rights reserved.

Share

 
COinS