X-ray diffraction study of changes in stress-strain distributions during the fatigue of a two-phase alloy

• Published in: Materials science and engineering 1986-05, Vol.79 (2), p.149-155
• Main Authors: Noyan, I.C., Cohen, J.B.
• Format: Article
• Language: English
• Subjects: Analysing. Testing. Standards; Applied sciences; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Fatigue; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals, semimetals and alloys; Metals. Metallurgy; Physics; Production techniques; Specific materials; Stress analysis; Surface hardening by mechanical treatment; Surface treatment
• ISSN: 0025-5416
• DOI: 10.1016/0025-5416(86)90398-8

In annealed two-phase brass, push-pull fatigue at loads near the endurance limit produces residual stresses only in the softer majority α phase and not in the β phase. These stresses are balanced between undeformed α phase regions and a small fraction of deformed α; the β phase is not involved in this balance. The uniform deformation produced by peening becomes inhomogeneous during fatigue, especially in the softer α phase. This inhomogeneity of deformation is greater after fatigue of the peened specimens than after fatigue of annealed material.