Effect of Different Manufacturing Process Steps on the Final Residual Stress Depth Profile along the Process Chain of Autofrettaged Thick-Walled-Cylinders

Abstract:

Selectively induced compressive residual stress depth profiles are gaining increasing importance as design tool for internally pressurized components. Hydraulic Autofrettage (AF) is a well-known manufacturing process to induce pronounced compressive residual stresses. However, AF does not stand alone in the technical process chain. In this paper, results from neutron diffraction experiments performed on thick-walled cylinders are presented and compared to finite-element simulations with Abaqus/CAE. The impact on the final residual stress depth profile after pre-machining, Autofrettage and post-machining is discussed.

• Periodical: Advanced Materials Research (Volume 996)
• Pages: 676-681
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.996.676
• Online since: August 2014
• Authors: Horst Brünnet*, Michael Hofmann, Nataliya Lyubenova, Dirk Bähre
• Keywords: Autofrettage, Finite Element Method (FEM), Neutron Diffraction

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