Journal ArticleDOI
Deformation of Cu–P alloys at high temperatures
H. L. Yiu,Terry Sheppard +1 more
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TLDR
In this article, the deformation behavior of Cu-P alloys has been investigated by torsion and tensile testing over a range of strain rates and temperatures, and it is shown from tensile results that a state of superplasticity can be achieved only if the small α grain size is stable and if the temperature and strain rate fall within certain limits.Abstract:
The deformation behaviour of Cu–P alloys has been investigated by torsion and tensile testing over a range of strain rates and temperatures. The torsion flow curves are interpreted in terms of dynamic softening processes, and the curves obtained during interrupted testing are used to examine static-restoration behaviour. Constitutive equations relating flow strength to strain rate and temperature are deduced, with allowance made for the effect of deformation heating, and implications of the equation constants are discussed. It is shown from tensile results that a state of superplasticity can be achieved in alloys containing 3·8 and 6·8 wt-%P. Superplasticity can occur only if the small α grain size is stable and if the temperature and strain rate fall within certain limits. The activation energy associated with superplastic flow has been determined.MST/52read more
Citations
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Characterization of the hot-working behaviour of a P/M Al-20Si-7.5Ni-3Cu-1Mg alloy by hot torsion
TL;DR: In this article, hot torsion tests were performed to investigate the mechanical and microstructural responses of a quinary Al-20Si-7.5 Ni-3Cu-1Mg (wt %) alloy, consolidated from a rapidly solidified powder, to deformation at varying temperatures and strain rates.
Patent
Verfahren und vorrichtung zum herstellen von loetstaeben mit einem kupferanteil
TL;DR: In this paper, a block of the alloy is shaped by an extrusion press into a single wire with a maximum diameter of 10 mm at a temperature between 540 and 680 DEG C.
Journal ArticleDOI
Prediction of superplastic behavior from high strain rate tests
TL;DR: In this paper, it was shown that Garofalo's hyperbolic sine creep relation can predict superplasticity at moderate strain rates in materials from their mechanical behavior in a higher strain rate region.
Journal ArticleDOI
Deformation rate response of an Al-Si alloy prepared from rapidly solidified powder
TL;DR: In this article, the deformation rate response of an important Al-Si-Cu-Mg alloy prepared from rapidly solidified powder is undertaken, through hot extrusion and tensile tests which cover a wide variation of strain rate.
Journal ArticleDOI
Composition, Properties, Application, and Manufacturing Features of Binary Copper–Phosphorus Solders
TL;DR: The field of application for binary copper-phosphorus alloys in the metallurgical industry is given in this paper. Butler et al. describe a mechanism for increasing the ductility after thorough hot extrusion.
References
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Journal ArticleDOI
Effect of Strain Rate Upon Plastic Flow of Steel
Clarence Zener,J. H. Hollomon +1 more
TL;DR: In this paper, an experiment was designed to check the equivalence of the effects of changes in strain rate and in temperature on the stress-strain relation in metal deformation.
Journal ArticleDOI
Strength and structure under hot-working conditions
TL;DR: The main feature of hot working is that extremely large strains are applied to materials at high rates of strain at temperatures above ∼ 0.6Tm, where Tm is the melting temperature in degrees Kelvin this article.
Journal ArticleDOI
Superplasticity in the Aluminium–Zinc Eutectoid
A. Ball,M. M. Hutchison +1 more
TL;DR: In this article, a grain-boundary sliding and grain rotation mechanism was proposed for superplastic extension of the aluminium-zinc eutectoid, where the strain rate (έ), flow stress (σ), grain size (L), and temperature were related empirically.
Journal ArticleDOI
Recrystallization of metals during hot deformation
TL;DR: In this article, the effects of dynamic and static recrystallization on microstructure and on the flow stress or creep rate of the metal are considered and particular attention is given to the range of deformation conditions under which these recrystization processes are expected to occur.