Journal ArticleDOI
Development and validation of a processing map for AFNOR 7020 aluminium alloy
TLDR
A simple instability condition is applied to delineate the regions of unstable metal flow in the processing map utilising flow stress data for AFNOR 7020 aluminium alloy, which was fitted in a constitutive equation as discussed by the authors.Abstract:
A simple instability condition is applied to delineate the regions of unstable metal flow in the processing map utilising flow stress data for AFNOR 7020 aluminium alloy, which was fitted in a constitutive equation Unstable regions identified from the simple instability condition at different strain levels were superimposed in the processing map This phenomenon takes into account the dependence of strain rate sensitivity and strain hardening effect on plastic instability during hot deformation of the material The processing map has been developed and validated by comparing microstructural observations of deformed compression specimensread more
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Experimental investigation of the hot deformation behavior of AA7075: Development and comparison of flow localization parameter and dynamic material model processing maps
Arash Jenab,A. Karimi Taheri +1 more
TL;DR: In this paper, the hot deformation characteristics of 7075 aluminum alloy (AA7075) were investigated by means of hot compression tests carried out in the temperature range of 200-450°C and strain rate range of 0.0003-1-s−1.
Journal ArticleDOI
Hot deformation behavior and 3D processing maps of AA7020 aluminum alloy
Bin Ke,Lingying Ye,Lingying Ye,Jianguo Tang,Jianguo Tang,Yong Zhang,Shengdan Liu,Shengdan Liu,Huaqiang Lin,Yu Dong,Xiaodong Liu +10 more
TL;DR: The hot deformation behavior and microstructural evolution of homogeneous annealed AA7020 aluminum alloy were investigated by isothermal compression tests over the temperatures range of 673-793 K and strain rates range of 0001-1 s−1.
Journal ArticleDOI
Hot workability and microstructure control in Co20Cr15W10Ni cobalt-based superalloy
TL;DR: In this article, hot isothermal compression tests were conducted on Cobalt-based superalloy Co 20Cr 15W 10Ni using a thermo-mechanical simulator to study the hot workability and microstructure evolution over a wide range of temperatures and strain rates.
Journal ArticleDOI
A Comparative Study of Various Flow Instability Criteria in Processing Map
TL;DR: In this article, four instability criteria, namely Murty, Gegel, Malas and Prasad, were compared, and the physical significance of parameters was analyzed in this paper.
Journal ArticleDOI
Effect of initial grain size on hot deformation behaviour of Cu-Cr-Zr-Ti alloy
TL;DR: In this article, the effect of initial grain size on hot workability of the alloy was investigated and it was found that there is an increase in difficulty of hot working and reduced control of microstructure in the alloy with increase in initial grain sizes.
References
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Journal ArticleDOI
Constitutive equations for use in prediction of flow stress during extrusion of aluminium alloys
T. Sheppard,A. Jackson +1 more
TL;DR: In this paper, a review of the use of the Zener-Hollomon type of equation in the context of extrusion is presented, and it is concluded that mainly because extrusion converts directly from cast to finished product a steady state equation is adequate for use in extrusion problems.
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Dynamic recrystallization during hot deformation of aluminum: A study using processing maps
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E. S. Puchi,M. H. Staia +1 more
TL;DR: In this paper, a model based on the power law relationship has been proposed for the analysis of the deformation curves corresponding to typical deformation conditions of interest for hot rolling of commercial aluminum alloys.
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