TITLE:
Determination of Residuals Stresses Induced by the Autofrettage Treatment by the X-Rays Diffraction Method
AUTHORS:
Naziha Zerari, Tarik Saidouni, Abdelouaheb Benretem
KEYWORDS:
Autofrettage; Elasto-Plastic; Residual Stresses; X-Rays Diffraction
JOURNAL NAME:
Modern Mechanical Engineering,
Vol.3 No.3,
August
12,
2013
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.