The laser shock peening process was used to increase fatigue life of pilger dies made of A2 tool steel by imparting compressive residual stresses to fatigue prone areas of the dies. The result of X-Ray diffraction analysis indicated that deep, high- magnitude compressive residual stresses were generated by the laser shock peening process, and the peened dies exhibited a significant increase of in-service life. Fractography of the failed dies indicates that the fracture mechanism was altered by the peening process.
Revised: October 30, 2008 |
Published: August 11, 2008
Citation
Lavender C.A., S. Hong, M.T. Smith, R.T. Johnson, and D. Lahrman. 2008.THE EFFECT OF LASER SHOCK PEENING ON THE LIFE AND FAILURE MODE OF A COLD PILGER DIE.Journal of Materials Processing Technology 204, no. 1-3:486-491.PNNL-SA-58328.