Superplastic forming (SPF) of metallic alloys allows the production of components with particularly complex shapes since in this regime, due to the predominance of grain boundary sliding (GBS), the material exhibits a high plastic stability. However, in many light alloys (i.e., Al or Mg alloys), superplastic deformation induces damage leading to premature fracture. Despite extensive work in the past, the mechanisms of damage induced by superplastic deformation remain under debate. In particular, due to the important contribution of GBS, voids with very irregular shapes frequently develop, resulting in a difficulty to obtain reliable experimental data from conventional quantitative metallography. It is the reason why the use of X-ray microtomography, providing 3D images of material bulk, is a particularly fruitful technique to investigate damage processes in superplastic materials. Thanks to this technique, damage development during superplastic deformation of Al and Mg alloys is investigated and the three main steps of damage development (nucleation, growth, and coalescence) are discussed.
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April 2008
Research Papers
Damage Development During Superplasticity of Light Alloys
R. Boissière,
R. Boissière
Institut National Polytechnique de Grenoble (INPG)
, SIMAP Laboratory∕GPM2 Group, CNRS∕UJF, BP 46, 38402 Saint-Martin d’Hères Cedex, France
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J. J. Blandin,
e-mail: jean-jacques.blandin@inpg.fr
J. J. Blandin
Institut National Polytechnique de Grenoble (INPG)
, SIMAP Laboratory∕GPM2 Group, CNRS∕UJF, BP 46, 38402 Saint-Martin d’Hères Cedex, France
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L. Salvo
L. Salvo
Institut National Polytechnique de Grenoble (INPG)
, SIMAP Laboratory∕GPM2 Group, CNRS∕UJF, BP 46, 38402 Saint-Martin d’Hères Cedex, France
Search for other works by this author on:
R. Boissière
Institut National Polytechnique de Grenoble (INPG)
, SIMAP Laboratory∕GPM2 Group, CNRS∕UJF, BP 46, 38402 Saint-Martin d’Hères Cedex, France
J. J. Blandin
Institut National Polytechnique de Grenoble (INPG)
, SIMAP Laboratory∕GPM2 Group, CNRS∕UJF, BP 46, 38402 Saint-Martin d’Hères Cedex, Francee-mail: jean-jacques.blandin@inpg.fr
L. Salvo
Institut National Polytechnique de Grenoble (INPG)
, SIMAP Laboratory∕GPM2 Group, CNRS∕UJF, BP 46, 38402 Saint-Martin d’Hères Cedex, FranceJ. Eng. Mater. Technol. Apr 2008, 130(2): 021014 (6 pages)
Published Online: March 13, 2008
Article history
Received:
July 26, 2007
Revised:
January 24, 2008
Published:
March 13, 2008
Citation
Boissière, R., Blandin, J. J., and Salvo, L. (March 13, 2008). "Damage Development During Superplasticity of Light Alloys." ASME. J. Eng. Mater. Technol. April 2008; 130(2): 021014. https://doi.org/10.1115/1.2884335
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