Abstract
Usually, autofrettage is achieved either by applying hydraulic pressure to the bore of the thick-walled cylinder or by pushing an oversized mandrel through the bore to deform the cylinder plastically. This produces the compressive residual stresses on the inner side of the cylinder, enabling the cylinder to withstand higher working pressure. There are certain difficulties in these methods of autofrettage. This work proposes a novel method for achieving autofrettage that involves creating temperature gradient in the wall of the cylinder. The proposed process is analyzed theoretically considering strain hardening. The simulation results and preliminary experiments indicate an encouraging trend for the feasibility of the proposed process.
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Kamal, S.M., Dixit, U.S. (2015). Feasibility Study of Thermal Autofrettage Process. In: Narayanan, R., Dixit, U. (eds) Advances in Material Forming and Joining. Topics in Mining, Metallurgy and Materials Engineering. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2355-9_5
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DOI: https://doi.org/10.1007/978-81-322-2355-9_5
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