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A new hot-tearing criterion
AbstractA new criterion for the appearance of hot tears in metallic alloys is proposed. Based upon a mass balance performed over the liquid and solid phases, it accounts for the tensile deformationExpand
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Rheological behavior of Al-Cu alloys during solidification constitutive modeling, experimental identification, and numerical study
The rheological behavior of a solidifying alloy is modeled by considering the deforming material as a viscoplastic porous medium saturated with liquid. Since the solid grains in the mush do not formExpand
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Three-dimensional granular model of semi-solid metallic alloys undergoing solidification: Fluid flow and localization of feeding
A three-dimensional (3-D) granular model which simulates fluid flow within solidifying alloys with a globular microstructure, such as that found in grain refined Al alloys, is presented. The modelExpand
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Experimental investigation of thermomechanical effects during direct chill and electromagnetic casting of aluminum alloys
The deformation and the temperature field within direct chill (DC) and electromagnetic (EM) cast aluminum ingots have been measuredin situ using a simple experimental setup. The deformation of theExpand
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Application of the Rappaz-Drezet-Gremaud Hot Tearing Criterion to Welding of Aluminium Alloys
Hot tearing, a severe defect occurring during solidification is the conjunction of tensile stresses which are transmitted to the mushy zone by the coherent solid underneath and of insufficient liquidExpand
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Modeling of ingot distortions during direct chill casting of aluminum alloys
A comprehensive three-dimensional (3-D) mathematical model based upon the ABAQUS software has been developed for the computation of the thermomechanical state of the solidifying strand during directExpand
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Determination of thermophysical properties and boundary conditions of direct chill-cast aluminum alloys using inverse methods
In order to quantify the cooling conditions undergone by an ingot during direct-chill (DC) casting, thermocouples were immersed in the liquid pool and consequently entrapped in the solid, thusExpand
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Pre-Heating of Thermoplastic Sandwich Materials for Rapid Thermoforming
The thermoforming of thermoplastic sandwich structures based on the same matrix polymer for the face sheets and the core requires precise temperature control both before and during forming. TwoExpand
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As-Cast Residual Stresses in an Aluminum Alloy AA6063 Billet: Neutron Diffraction Measurements and Finite Element Modeling
The presence of thermally induced residual stresses, created during the industrial direct chill (DC) casting process of aluminum alloys, can cause both significant safety concerns and the formationExpand
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High Apparent Creep Activation Energies in Mushy Zone Microstructures
Modelling represents an important tool in modern material processing which no longer follows the traditional trial and error route but rather represents what may be termed a right first timeExpand
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