Benchmark Burnishing with Almen Strip for Surface Integrity

Authors

Z. Y. Liu, University of Alabama - Tuscaloosa
C. H. Fu, University of Alabama - Tuscaloosa
M. P. Sealy, University of Nebraska-LincolnFollow
Y. Zhao, Shandong University of Technology
Y. B. Guo, University of Alabama - TuscaloosaFollow

Document Type

Article

Date of this Version

2017

Citation

Procedia Manufacturing 10 ( 2017 ), pp. 456 – 466, doi: 10.1016/j.promfg.2017.07.027.

Comments

© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.

Abstract

Burnishing is a surface treatment process widely used in aerospace, navy and other industries to improve fatigue and corrosion resistance by introducing a compressive residual stress layer. The measurement of residual stress by XRD is expensive, time consuming, and tedious. This work presented a quick method to determine the residual stress by using Almen strips. Inspired by the application of Almen strips in shot peening, deflections of burnished Almen strips under different burnishing conditions were measured. It was found that the deflection of Almen strip reflects the magnitude and penetration depth into subsurface of induced stress. Higher burnishing force, smaller feed, and smaller ball diameter tend to produce more deflection, which indicates more compressive residual stress.