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Residual stress mapping along the cylinder bores of Al alloy engine blocks subjected to production solution heat treatment schedule

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.4271/2014-01-0837
AuteurRechercher : ; Rechercher : 1; Rechercher : ; Rechercher :
Affiliation du nom
  1. Conseil national de recherches du Canada. Technologies de sécurité et de rupture
FormatTexte, Article
Sujetaluminum cylinders; axial orientations; current production; cylinder bore; engine blocks; heat treatment schedule; solution heat treatment; tensile residual stress; aluminum; cast iron; engines; heat treatment; neutron diffraction; residual stresses; cylinder blocks
Résumé
The development of an optimized heat treatment schedule, with the aim of maximizing strength and relieving tensile residual stress, is important to prevent in-service cylinder distortion in Al alloy engine blocks containing cast-in gray iron liners. However, to effectively optimize the engine block heat treatment schedule, the current solutionizing parameters must be analyzed and compared to the as-cast condition to establish a baseline for residual stress relief. In this study, neutron diffraction was carried out to measure the residual stress along the aluminum cylinder bridge following solution heat treatment. The stresses were measured in the hoop, radial and axial orientations and compared to a previous measured as-cast (TSR) engine block. The results suggest that solution heat treatment using the current production parameters partially relieved tensile residual stress in the Al cylinder bridge, with stress relief being more effective near the bottom of the cylinder.
Date de publication
Dans
  • SAE International Journal of Materials and Manufacturing 7, nº 2 (1 avril 2014) : 415–420.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21275448
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Identificateur de l’enregistrementec895e75-efef-4b5c-8b67-8936c7124e9f
Enregistrement créé2015-07-14
Enregistrement modifié2020-04-22
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