Effects of cyclic stressing, heat treatment and shot-peening pressure on the residual stress distribution in two titanium alloys

• Published in: Journal of materials science Vol. 31; no. 16; pp. 4381 - 4385
• Main Authors: SRIDHAR, B. R, RAMACHANDRA, K, PADMANABHAN, K. A
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 15.08.1996
• Subjects: Applied sciences; Exact sciences and technology; Metals. Metallurgy; Production techniques; Surface hardening by mechanical treatment; Surface treatment; Heat treatment; Deformation; Zirconium alloy; Shot peening; Aluminium alloy; Titanium base alloys; Tensile stress; Molybdenum alloy; Stress relaxation; Mechanical treatment; Pressure effect; Stress distribution; Cyclic load; Vanadium alloy; Residual stress
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/BF00356464

Using the method of drilling holes, the residual stress distributions were determined in two titanium alloys, IMI-685 and IMI-318, in the machined, polished, shot-peened and cyclically stressed (MPSC) as well as the heat-treated and quenched (HTQ) conditions. In IMI-318, the effect of shot-peening pressure on the residual stress distribution was also studied. Tensile cyclic stressing relaxed the shot-peen induced residual stresses in the longitudinal direction and the extent of relaxation depended on the degree of cyclic softening present in the material. In both alloys, in the post-beta heat-treated and quenched condition, the residual stresses were tensile in nature. In IMI-318, a decrease in the shot-peening pressure led to residual stresses of lower magnitudes. The peak residual stress was present closer to the surface when the shot-peening pressure was increased. (Author)