Shot Peening in Steam Turbines
Author: Ralph Ortolano, Robert Kleppe, Russell Chetwynd
Source: Turbine Rescue
Doc ID: 2005140
Year of Publication: 2005
Abstract:
Shot peening has been used for centuries to improve the fatigue life in many metals, and in modern applications (1920’s), began with shot peening automobile engine valve springs. Since then the practice of shot peening has been used in many other products. This includes aircraft airframes and engines, Diesel engines, automobile crank shafts and gear teeth, marine reduction gears, automobile and truck parts, railroad car and engine parts, elevators and other lifting equipment, as well as many other mechanisms subjected to fatigue. Steam turbines designed by virtually all turbine manufacturers use shot peening and/or compression rollers to enhance fatigue life. More recently, shot peening has been used to improve metal life subjected to stress corrosion cracking (SCC), and intergranular attack (IGA).
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