Peened Surfaces Improve Indurance Of Machine Parts

Author:  Almen, J. O.
Source:  Metal Progress, Vol. 43, Feb. 1943, p. 209-215
Doc ID:  1943002
Year of Publication:  1943
Abstract:  
Fully 90% of all fatigue failures occuring in serice or during laboratory and road test are traceable to design and production defects, and only the remaining 10% are primarily the responsibility of the metallurgist as defects in material, material specification or heat treatment. While this ratio is not a measure of the quality of workmanship contributed by each department, there can be no doube tht the metallurgist has a better appreciation of his responsibility for fatigue failures than has the designer, the engineer, or the man in the production department - in fact, it contributes to the relative irresponsibility of the engineer by over-willingness of the metallurgis to accept the blame when things go wrong.