How Time Affects Almen Strip Arc Height

Author:  Erik Waelchli, Owner of IBD Connection, Inc. and Electronics Inc. Consultant
Source:  The Shot Peener magazine, Vol 36, Issue 1, Winter 2022
Doc ID:  2022005
Year of Publication:  2022
Abstract:  
INTRODUCTION Can or should Almen strips be archived? Does the arc height after peening change over time and if yes, by how much? If there is a change, is the change of relevant magnitude? These questions came up during a weekly engineering meeting at Electronics Inc. (EI). No one had a definitive answer so we initiated a long-term study. The test was started in March, 2019 and was concluded with the last measurement taken on September 23, 2021.