Numerical simulation on rheo-diecasting mould filling of semi-solid key-shaped component

2008 ◽  
Vol 18 (3) ◽  
pp. 682-685 ◽  
Author(s):  
Yue-long BAI ◽  
Wei-min MAO ◽  
Jun XU ◽  
Hong XU ◽  
Hua HOU
Keyword(s):  
Numerical Simulation ◽  
Mould Filling ◽  
Semi Solid

Numerical Simulation of Mould Filling in Rheo-Diecasting Process of Semi-Solid Magnesium Alloys

2006 ◽  
Vol 116-117 ◽  
pp. 554-557 ◽  
Author(s):  
Shu Sen Wu ◽  
Jun Wen Zhao ◽  
Li Wan ◽  
Jirong Luo
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloy ◽  
Computer Program ◽  
Magnesium Alloys ◽  
Experimental Results ◽  
Air Entrapment ◽  
Mould Filling ◽  
Slurry Flows ◽  
Semi Solid ◽  
Numeral Simulation

The mould-filling behavior of rheo-diecasting of semi-solid magnesium alloy and diecasting of liquid magnesium alloy has been simulated with the computer program of numerical simulation developed by the authors. Results show that, under the same diecasting conditions, the filling behavior of rheo-diecasting of semi-solid metals is similar to the liquid diecasting, but mould filling of semi-solid slurry is steadier, and the slurry flows into the mould in a state similar to lamellar flow. The air entrapment in semi-solid process is much smaller than that of liquid diecasting, and the castings made with semi-solid rheo-diecasting excel those with liquid diecasting in quality. Experimental results are in accord with the results of numeral simulation.

Numerical Simulation on the Filling Process of Rheological Die Casting and Forming Defects Analysis

2012 ◽  
Vol 192-193 ◽  
pp. 293-298 ◽  
Author(s):  
Fan Zhang ◽  
Nan Nan Song ◽  
Jun Zhang ◽  
Yong Lin Kang ◽  
Qiang Zhu
Keyword(s):  
Numerical Simulation ◽  
Die Casting ◽  
A356 Alloy ◽  
Casting Process ◽  
Solid Particles ◽  
Filling Process ◽  
Die Casting Process ◽  
Defects Analysis ◽  
Semi Solid ◽  
Forming Defects

According to semi-solid slurry rheological behavior, an apparent viscosity model of A356 alloy developed based on the Carreau model was established to simulate filling process of rheo-diecasting about automobile shock absorber parts and to compare with conventional liquid filling process. Numerical simulation results showed that the filling process of rheo-diecasting was smooth but difficult to splash, which reduced the tendency of the alloy oxidation and inclusion. Meanwhile, a certain percentage of the primary solid particles precipitated before filling and solidification shrinkage of semi-solid slurry were small. This benefited to reduce or eliminate shrinkage defects of the castings. Compared with conventional liquid die casting process, rheo-diecasting process had unique advantages in reducing the internal defects and improving mechanical properties of castings.

scholarly journals Numerical Simulation and Experimental Investigation of the Preparation of Aluminium Alloy 2A50 Semi-Solid Billet by Electromagnetic Stirring

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5470
Author(s):  
Yongfei Wang ◽  
Shengdun Zhao ◽  
Yi Guo
Keyword(s):  
Numerical Simulation ◽  
Aluminium Alloy ◽  
Deep Understanding ◽  
Electromagnetic Stirring ◽  
Experimental Result ◽  
Maximum Speed ◽  
Operating Parameters ◽  
Average Grain Size ◽  
Semi Solid ◽  
High Level

Electromagnetic stirring (EMS) has become one of the most important branches of the electromagnetic processing of materials. However, a deep understanding of the influence of the EMS on the thermo-fluid flow of the aluminium alloy melt, and consequently the refinement of the microstructure is still not available. This paper investigated the influence of the operating parameters of EMS on the magnetohydrodynamics, temperature field, flow field, and the vortex-shaped structure of the melt as well as the microstructure of the aluminium alloy 2A50 billet by numerical simulation and experiments. The operating parameters were categorised into three groups representing high, medium, and low levels of Lorentz forces generated by EMS. The numerical simulation matched well with the experimental result. It was found that a high level of EMS can improve the uniformity of the temperature and flow fields. The maximum speed was observed at the radius of around 25 mm under all EMS levels. Both the depth and diameter of the vortex-shaped structure generated increased with the enhancement in the EMS level. The average grain size of the edge sample of the billet was reduced by 48.3% while the average shape factor was increased by 51.0% under the medium-level EMS.

Experimental Study on Semi-Solid Indirect Squeeze Casting

2012 ◽  
Vol 192-193 ◽  
pp. 410-414
Author(s):  
Pei Wei Bao ◽  
Shu Ming Xing
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
Process Improvement ◽  
Squeeze Casting ◽  
Experimental Results ◽  
Runner Design ◽  
Semi Solid ◽  
Layer Coating

In the Semi-Solid Processing of indirect squeeze casting, runners were needed for each part cavity. In our experiment, it was found that some of the runners were blocked, and some parts were not filling in full mold. Numerical simulation was applied to analyze this phenomenon, and the results show that it was the shell which emerged on the chamber surface that blocked the runner. Experimental results also confirmed our interpretation. Some measures have been used to correct it, such as runner design, two-layer coating, and process improvement which eliminated blocking of the runner.

Strain Analysis of Bimetal Material Based on Uniaxial Tensile and ANSYS

2014 ◽  
Vol 988 ◽  
pp. 27-30 ◽  
Author(s):  
De Hai Zhang ◽  
Duan Qin Zhang ◽  
Yan Qin Li ◽  
Jian Xiu Liu ◽  
Dai Ping Bai ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Strain Analysis ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Theoretic Analysis ◽  
Combined Method ◽  
Experiment Research ◽  
Test Experiment ◽  
Existing Problems ◽  
Semi Solid

With a combined method of theoretic analysis, numerical simulation and uniaxial tensile test experiment research, the properties of bimetal materials are system studied. The researches are concentrated on the followings contexts:The fabricating method of bimetal materials by semi-solid compressive joining is studied by ANSYS, and then the tensile property relationships of the clad material are established. The stress and their strains alongx,yandzdirections of the clad material are analyzed, respectively. The different performance of composite materials, find materials conform to the existing problems so as to optimize treatment.

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