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Shape Casting pp 303-310 | Cite as

Measurement of Residual Strain in the Cylinder Bridge of High-Pressure Die Cast A383 Engine Blocks Using Neutron Diffraction

  • T. Liu
  • L. N. Brewer
  • Jeffrey R. Bunn
  • Chris M. Fancher
  • L. Nastac
  • V. Arvikar
  • I. LevinEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

This article describes the use of neutron diffraction to measure residual strains in high-pressure die cast aluminum alloy engine blocks. High-pressure die casting is widely used to manufacture aluminum alloy components for automobile applications such as engine blocks. Thermal gradients during this process can generate residual strain and stresses and may cause premature failure during service. Neutron diffraction can be used to measure the residual stress distributions deep inside large castings, as neutrons have much larger penetrating power than X-rays. In this work, neutron diffraction was used to measure the residual strain (in the axial and hoop directions) in the cylinder bridge region of high-pressure die cast A383 engine blocks in as-cast and heat-treated conditions. The results suggest that the residual strain in the cylinder bridge is tensile in both the axial and hoop components for both as-cast and heat-treated engines. The residual strain in hoop direction is higher than the strain in axial direction. Residual strain in axial and hoop directions is relaxed after heat treatment.

Keywords

Residual stress High pressure die casting Distortion Al-Si-Cu alloys 

Notes

Acknowledgements

The authors are very grateful to the Alabama State Department of Commerce (Alabama Innovation Fund) and Nemak Inc. for financial support of this research. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

References

  1. 1.
    Bonollo F, Gramegna N, Timelli G (2015) High-pressure die-casting: contradictions and challenges. JOM 67(5):901–908CrossRefGoogle Scholar
  2. 2.
    Darut G, Liao H, Coddet C, Bordes JM, Diaby M (2015) Steel coating application for engine block bores by plasma transferred wire arc spraying process. Surf Coat Technol 268:115–122CrossRefGoogle Scholar
  3. 3.
    Lombardi A, Sediako D, Machin A, Ravindran C, MacKay R (2017) Effect of solution heat treatment on residual stress in Al alloy engine blocks using neutron diffraction. Mater Sci Eng A-Struct Mater Prop Microstruct Process 697:238–247CrossRefGoogle Scholar
  4. 4.
    Patwardhan M, Paranjpe JM, Ramdasi SS, Karanth NV, Marathe NV, Bhat P (2015) Use of non linear analysis in powertrain design for prediction of cylinder bore distortion, design changes for reduction along with experimental validation, SAE Technical PaperGoogle Scholar
  5. 5.
    Withers PJ, Bhadeshia H (2001) Overview - residual stress part 1 - measurement techniques. Mater Sci Technol 17(4):355–365CrossRefGoogle Scholar
  6. 6.
    Lombardi A, Sediako D, Machin A, Ravindran C, MacKay R (2015) Transient analysis of residual strain during heat treatment of multi-material engine blocks using in-situ neutron diffraction. Mater Lett 157:50–52CrossRefGoogle Scholar
  7. 7.
    Lombardy A, Sediako D, D’Elia F, Ravindran CR, Mackay RI (2012) Neutron diffraction study on residual stress in aluminum engine blocks following machining and service testing, SAE International Journal of Materials and Manufacturing 5(2012-01-0188):115–121Google Scholar
  8. 8.
    Lombardi A, Ravindran C, Sediako D, MacKay R (2014) Determining the mechanism of in-service cylinder distortion in aluminum engine blocks with cast-in gray iron liners. Metall Mater Trans A 45(13):6291–6303CrossRefGoogle Scholar
  9. 9.
    Wiesner D, Watkins T, Ely T, Spooner S, Hubbard C, Williams J (2005) Residual stress measurements of cast aluminum engine blocks using diffraction. Int Cent Diffr Data Adv X-Ray Anal 48:136–142Google Scholar
  10. 10.
    Su X, Jan J, Lasecki J, Allison J (2003) Thermal and residual stress analysis of an engine block with cast-in liners. In: Materials solutions conference 2003, vol. 2003Google Scholar
  11. 11.
    Carrera E, Rodriguez A, Talamantes J, Valtierra S, Colas R (2007) Measurement of residual stresses in cast aluminium engine blocks. J Mater Process Technol 189(1–3):206–210CrossRefGoogle Scholar
  12. 12.
    Reihle M, Hofmann M, Wasmuth U, Volk W, Hoffmann H, Petry W (2014) In situ strain measurements during casting using neutron diffraction. In: Materials Science Forum 2014, pp 484–491. Trans Tech PublicationsGoogle Scholar
  13. 13.
    Cornwell P, Bunn J, Fancher C, Payzant E, Hubbard C (2018) Current capabilities of the residual stress diffractometer at the high flux isotope reactor. Rev Sci Instrum 89(9):092804CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • T. Liu
    • 1
  • L. N. Brewer
    • 1
  • Jeffrey R. Bunn
    • 2
  • Chris M. Fancher
    • 2
  • L. Nastac
    • 1
  • V. Arvikar
    • 3
  • I. Levin
    • 3
    Email author
  1. 1.Department of Metallurgical and Materials EngineeringThe University of AlabamaTuscaloosaUSA
  2. 2.Oak Ridge National LaboratoryOak RidgeUSA
  3. 3.Nemak AlabamaSylacaugaUSA

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