منابع مشابه
Two-Phase Modeling of Hot Tearing in Aluminum Alloys: Applications of a Semicoupled Method
Hot tearing formation in both a classical tensile test and during direct chill (DC) casting of aluminum alloys has been modeled using a semicoupled, two-phase approach. Following a thermal calculation, the deformation of the mushy solid is computed using a compressive rheological model that neglects the pressure of the intergranular liquid. The nonzero expansion/ compression of the solid and th...
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This paper reports the current status of Mg melt protection in view to identify near-future challenges, but also opportunities, for Mg melt protection of Mg-Al based alloys. The goal is to design and manufacture sustainable Mg alloys for resource efficiency, recycling and minimising waste. Among alternative cover gas technologies for Mg melt protection other than SF6: commercially available tec...
متن کاملModeling of Stress, Distortion, and Hot Tearing
COMPUTATIONALMODELING of mechanical behavior during solidification is becoming more important. Thermal and microstructural simulations alone are insufficient to predict the quality of the final product that is desired by the casting industry. Accurate calculation of displacements, strains, and stresses during the casting process is needed to predict residual stress and distortion and defects su...
متن کاملModeling of Hot Tearing and Other Defects in Casting Processes
AS COMPUTATIONAL MODELS MATURE, their practical benefit to improving casting processes is growing. Accurate calculation of fluid velocities, temperature, microstructure, and stress evolution is just the first step. Achieving tangible improvements to casting processes requires the accurate prediction of actual casting defects and product properties. Defects that form during solidification are im...
متن کاملExcessively High Vapor Pressure of Al-Based Amorphous Alloys
Aluminum-based amorphous alloys exhibited an abnormally high vapor pressure at their approximate glass transition temperatures. The vapor pressure was confirmed by the formation of Al nanocrystallites from condensation, which was attributed to weight loss of the amorphous alloys. The amount of weight loss varied with the amorphous alloy compositions and was inversely proportional to their glass...
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ژورنال
عنوان ژورنال: Manufacturing Technology
سال: 2016
ISSN: 1213-2489,1213-2489
DOI: 10.21062/ujep/x.2016/a/1213-2489/mt/16/2/323