Effect of Shot-Peening on the Fatigue Strength of Spring Steel After Exposure to Corrosion

Author:  A. Nakonieczny and G. Monka
Source:  Conf Proc: ICSP-9 (pg 448-453)
Doc ID:  2005123
Year of Publication:  2005
Abstract:  
INTRODUCTION Corrosion is a process which can be neither retarded, nor glossed over. Over a shorter or longer period of time corrosion destroys the majority of objects which are made by man, regardless of the material from which they are made. There are numerous methods and technologies for protecting the surfaces of metallic objects, most often by depositing on them or forming of coatings or layers which block the direct action of corrosive environments, for minimizing or eliminating surface or volume corrosion. It is known that residual compressive stresses which can be generated by various manufacturing and other technological processes will be conducive to a rise of longevity of mechanically loaded components working in a corrosive environment [1]. Known and widely used in many countries is the process of enhancing the fatigue strength of materials by the application of shot-peening, a dynamic surface deformation treatment. Advantages stemming from the shot-peening are the result of the effect of compressive residual stresses, together with strengthening by cold working. The objective of this investigation was to show to what extent shot-peening affects the fatigue strength of spring steel, additionally exposed to a corrosive environment.