Neutron Diffraction Study on Residual Stress in Aluminum Engine Blocks Following Machining and Service Testing 2012-01-0188
Development of lightweight alloys suitable for automobile applications has been of great importance to the automotive industry in recent years. The use of 319 type aluminum alloy in the production of gasoline engine blocks is an example of this shift towards light alloys for large automobile components. However, excessive residual stress along the cylinder bores of these engine blocks may cause problems during engine operation. Therefore, in this study, neutron diffraction was used to evaluate residual stresses along the aluminum cylinder bridge and the gray cast iron liners. The strains were measured in the hoop, radial, and axial orientations, while stresses were subsequently calculated using generalized Hooke's law. The results suggest that the residual stress magnitude for the aluminum cylinder bridge was tensile for all three measured components and gradually increased with cylinder depth towards the bottom of the cylinder. The residual stress in the gray cast iron liner was highly compressive with a relatively constant stress magnitude.
Citation: Lombardy, A., Sediako, D., D'Elia, F., Ravindran, C. et al., "Neutron Diffraction Study on Residual Stress in Aluminum Engine Blocks Following Machining and Service Testing," SAE Int. J. Mater. Manf. 5(1):115-121, 2012, https://doi.org/10.4271/2012-01-0188. Download Citation
Anthony Lombardy, Dimitry Sediako, Francesco D'Elia, C. (Ravi) Ravindran, Robert I. Mackay
Ryerson University, National Research Council Canada, Nemak of Canada
SAE 2012 World Congress & Exhibition
SAE International Journal of Materials and Manufacturing-V121-5, SAE International Journal of Materials and Manufacturing-V121-5EJ