Variations on the Almen Technique

Author:  Prof. Dr. David Kirk, Coventry University, U.K.
Source:  The Shot Peener magazine, Vol 31, Issue 4, Fall 2017
Doc ID:  2017144
Year of Publication:  2017
Abstract:  
INTRODUCTION: First instigated in 1942 with a patent submission, the Almen technique has now provided a reliable and universally accepted method of measuring peening intensity based on the deflection of standard strips when exposed for different times to a shot stream. This article considers various alternatives to and variants of the Almen technique. These alternatives and variants are those developed by the author in his Coventry University Shot Peening Laboratory—set up in order to facilitate studies of shot peening variables. A common thread was to question every aspect of the standard Almen technique. Principal considerations included Materials, Shape and Deflection Monitoring.