A study on stress, reflection and double shot peening to increase compressive residual stress

• Published in: Fatigue & fracture of engineering materials & structures 2000-11, Vol.23 (11), p.959-963
• Main Authors: ISHIGAMI, H, MATSUI, K, JIN, Y, ANDO, K
• Format: Article
• Language: English
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Deformation and plasticity (including yield, ductility, and superplasticity); Exact sciences and technology; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Metals. Metallurgy; Physics
• ISSN: 8756-758X; 1460-2695
• DOI: 10.1046/j.1460-2695.2000.00329.x

The technique of shot peening is commonly used to increase the fatigue limit of a steel. However, there are many practical difficulties in applying it to very high HV steel and complicated components. To overcome these problems, the authors have proposed two new methods: stress double shot peening and stress reflection double shot peening. Both techniques were applied to quenched and tempered steel (QT steel) and induction-heated steel (IH steel). With double shot peening, the compressive residual stress near the sample surface was increased considerably. With stress shot peening, the maximum compressive residual stress and the surface compressive residual stress were greatly increased. With stress double shot peening, very high compressive residual stresses were successfully introduced into a hard steel (HV=700). With the new method (stress reflection double shot peening), very high compressive residual stresses successfully introduced into a hard steel (HV=700). (Author)