Residual Stresses in Shot Peened Grey and Compact Iron
2014 (English)In: HTM Journal of Heat Treatment and Materials, ISSN 1867-2493, EISSN 2194-1831, Vol. 69, no 1, 38-45 p.Article in journal (Refereed) Published
Grey cast iron and compacted graphite iron with a pearlitic matrix are investigated in this study after shot peening using twelve unique combinations of parameters, namely shot size, peening intensity and coverage, followed by residual stress measurements and evaluations. Cylindrical test samples were cut out from heavy truck cylinder heads and polished on the top flat surface to decrease effects from cutting. Residual stresses and the affected depth from the different peening conditions varied between −245 MPa to −565 MPa and from 280 μm to 770 μm in depth. Resultant surface compressive stresses decrease with increasing shot size, peening intensity or coverage whereas the affected depth increases with increasing intensity. The increased affected depth is a result from the increased extent and magnitude of plastic deformation. The compacted graphite iron was more affected by shot peening than the grey cast iron, meaning that the same shot peening parameters resulted in both higher compressive stresses and larger deformation depth.
Place, publisher, year, edition, pages
Carl Hanser Verlag GmbH, 2014. Vol. 69, no 1, 38-45 p.
Residual stress, FWHM, cast iron, shot peening, X-ray diffraction
Engineering and Technology Materials Engineering
IdentifiersURN: urn:nbn:se:liu:diva-105158DOI: 10.3139/105.110207ScopusID: 2-s2.0-84896531682OAI: oai:DiVA.org:liu-105158DiVA: diva2:703916
International Conference on Residual Stresses ICRS9, October 7-9,2012 in Garmisch-Partenkirchen, Germany
Enhanced contribution based upon a presentation at the International Conference on Residual Stresses ICRS9, October 7–9, 2012, in Garmisch-Partenkirchen, Germany2014-03-102014-03-102015-04-09Bibliographically approved