Results 171 to 180 of about 1,554 (222)

Analysis of void growth in superplastic materials

Journal of Materials Processing Technology, 2004
Abstract A number of materials is subject to the cavitation during superplastic deformation. The cavities nucleate at sites such as grain boundaries, second phase particles, and triple points; subsequently, they grow and interlink with the neighbouring cavities. Cavitation usually leads either to the undesirable post-forming characteristics or to the
UCCIARDELLO, NADIA, Carrino, L, Giuliano, G.   +2 more
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Failure analysis in superplastic materials

International Journal of Machine Tools and Manufacture, 2006
Abstract Superplastic alloys and metals possess the ability to undergo large uniform strains prior to failure. Isothermal superplasticity of sheet metal is a phenomenon due to both peculiar process condition and material intrinsic characteristics.
exaly   +3 more sources

Analysis of forming limit diagram for superplastic materials

International Journal of Advanced Manufacturing Technology, 2005
Superplastic materials show very large tensile elongation (in excess of 5000%) even if they are lowly stressed. Superplastic forming is carried out at high temperatures and relatively low strain rates. In order to control the industrial forming processes, the difficulty in predicting the failure strain of superplastic materials is main problem faced by
Gillo Giuliano, Giuliano Gillo
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Stress relaxation in superplastic materials

Journal of Materials Science, 1973
G S Murty, Murty G S
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Superplasticity in advanced materials

Materials Science and Engineering: R: Reports, 1993
Abstract The ability to achieve a high tensile ductility in a polycrystalline material is of interest both from a scientific point of view and also because of potential applications in the materials forming industry. The superplasticity of conventional metallic alloys is now well-documented and understood reasonably well.
A CHOKSHI, A MUKHERJEE, T LANGDON
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Superplasticity in Hard-To-Machine Materials

Annual Review of Materials Science, 1996
Progress in the development of predictive models for superplasticity in metal matrix composites and in intermetallic and ceramic materials is described. Intermetallic materials deform in a conventional superplastic manner. In metal matrix composites, the role of threshold stresses, alloy composition, and texture are important and not well understood ...
T R Bieler, R S Mishra, A K Mukherjee
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Rheological analysis of superplasticity in metallic materials

Rheologica Acta, 1974
By making use of the empirical relations between stress and strain rate useful expressions concerning the variation of viscosity and activation energies for superplastic deformation are derived. The analyses of superplasticity, based on conventional continuum mechanics, neglect grain size effects. A new technique has been developed where the grain-size
K. A. Padmanabhan, G. J. Davies
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Superplasticity in ceramic materials—I. The observation of a “superplastic partition” in ceramics

Acta Materialia, 1996
Abstract Recent developments in the understanding of the mechanical behavior of ceramics assessed for superplastic deformation indicate that stoichiometric changes at interfaces and an associated “metallic” behaviour can account for the superplastic behaviour in the absence of a grain boundary glassy phase.
T.J. Davies, A.A. Ogwu, N. Ridley, Z.C. Wang   +3 more
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Deep drawing of superplastic material

Metals Technology, 1976
AbstractA technique of deep drawing superplastic sheet material is described in which a differential temperature between the sheet and punch is used. With super plastic ZAM, the drawability obtained with this technique is significantly greater than that obtained with conventional materials or with superplastic materials using other techniques.
R. Hawkins, J. A. Belk
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Superplasticity in large grained materials

Acta Metallurgica, 1972
Abstract The high temperature deformation properties of the b.c.c. phases of three titanium alloys, copper-zinc and copper-aluminium alloys have been determined. Superplastic behaviour has been found in all except the copper-aluminium alloy without the usual pre-requisite of a fine grain size.
P Griffiths, C Hammond
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