Determination of Residuals Stresses Induced by the Autofrettage Treatment by the X-Rays Diffraction Method

Naziha Zerari, Tarik Saidouni, Abdelouaheb Benretem

Laboratory of the Electromechanicaly Engineering Badji Mokhtar-Annaba University, Annaba, Algeria.
Laboratory of the Mechanical Systems, Path, Engineering of the Mechanical Systems, Option Structure and Production Ministry of the National Defense, School Military Polytechnic EMP, Alger, Algeria.

DOI: 10.4236/mme.2013.33017                

Abstract

Some meaningful advances have been made these last years to value precise and reliable way the residual stresses experimentally created by the autofrettage. The autofrettage process is used widely to introduce residual stresses into thick walled tubes; traditionally residual stresses have been measured using the Sachs method destructive or non-destructive methods. In this paper we describe the application of the X-rays diffraction; this technique permits to justify the presence of the compressive tangential residual stresses, and to value their distribution after two different autofrettage internal pressures loading. The results show that there is a large difference in the residual stresses find in the different autofrettege pressure. One can see the influence of the autofrettage’s pressure quantity on residual stresses created in the thickness of the test tubes.

Keywords

Autofrettage; Elasto-Plastic; Residual Stresses; X-Rays Diffraction

Conflicts of Interest

The authors declare no conflicts of interest.

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