Influence of Pre-Annealing on Surface and Surface Layer Characteristics Produced by Shot Peening

Author:  Tosha, Lu, Retraint, Guelorget, Iida
Source:  Conf Proc: ICSP-8 Sept. 16-20, 2002 Garmisch-Partenkirchen, Germany
Doc ID:  2002024
Year of Publication:  2002
Authors Katsuji Tosha, Meiji Univ. Higashimita, Tama-ku, Tawasaki, Japan Jian Lu, Delphine Retraint, Bruno Guelorget, Universite de Technologie de Troyes, Rue Marie Curie, Troyes, France Kisuke Iida, Society of Shot Peening Technology of Japan, c/o Meiji Univ. Kawasaki, Japan Introduction Several effects produced by shot peening for fatigue strength, stress corrossion cracking, wear resistance, heat transfer and flow resistance are reported in many papers. Their factors relative to those effects are surface roughness, residual stresses, hardness and texture. In general, peening effects for fatigue strength are influenced by compressive residual stresses and work hardening [1,2,3], and for heat transfer or radiation is influenced by surface roughness and affected layer [4,5], but their relations with each factors are not always simple. The most important factor of the effect for fatigue strength is residual stress, and residual stress value changes with the texture of work material and the measuring ways. In this experiment, in order to clarify the influences of shot peening on the surface roughness, hardness distribution, half width and residual stress, work materials with several different hardness produced by different annealing conditions were peened, and the influence of pre-annealing on surface and surface layer characteristics was studied.

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