Determination and verification of the gap dependent heat transfer coefficient during permanent mold casting of A356 aluminum alloy

Effect of multi-section linear non-uniform heat transfer coefficient on quenching residual stress distribution in 27mm-thick Al-Zn-Mg-Cu aluminum alloy plate was simulation studied by using the finite element method, and the surface quenching residual stress distribution was measured by the X-ray diffraction method and hole-drilling method. The results show that the surface quenching residual stress represents the same distribution with non-uniform heat transfer coefficient in the transverse direction and the stress level maintains initial stress level of the heat transfer coefficient at each location. The distribution of the quenching residual stress in the center of the plate is approximately uniform and the stress level is approximately equal to average of maximum and minimum initial stress level. The measured surface quenching residual stress shows a wavy distribution in the transverse direction, which is similar to the simulated surface stress distribution without considering the stress level. The measurement results can be explained by the multi-section linear non-uniform quenching model.

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Mechanical Properties of A356 Aluminum Cast Alloy Shaped by Permanent Mold Casting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.941-944.89 ◽

2014 ◽

Vol 941-944 ◽

pp. 89-92

Author(s):

Ping Chen ◽

Jian Min Zeng ◽

Wu Kui Gan ◽

Jin Bo Liu

Keyword(s):

Mechanical Properties ◽

Cast Alloy ◽

Eutectic Silicon ◽

A356 Alloy ◽

Permanent Mold ◽

Permanent Mold Casting ◽

Mold Casting ◽

Needle Morphology ◽

A356 Aluminum ◽

Alloy Cast

A356 is a heat treatable cast alloy which has been widely applied in aviation and automobile industries. In this paper a Sb modified A356 alloy cast with permanent mold has been investigated in order to improve its mechanical properties by changing the needle morphology of the eutectic silicon. The results show that a small amount of Sb addition can contribute refined eutectic silicon morphology and enhance the mechanical properties, especially elongation of the A356 cast alloy poured in permanent molds. The optimal addition of Sb is 0.2 wt.%.

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Numerical Simulation and Optimization in Solidification of Zinc Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2902 ◽

2011 ◽

Vol 287-290 ◽

pp. 2902-2905 ◽

Cited By ~ 1

Author(s):

Ying Zhang ◽

Guo Rui Jia ◽

Xian Jiao Xie ◽

Shui Sheng Xie ◽

Jin Yu He ◽

...

Keyword(s):

Heat Transfer ◽

Aluminum Alloy ◽

Heat Transfer Coefficient ◽

Transfer Coefficient ◽

Shrinkage Porosity ◽

Casting Temperature ◽

Zinc Alloy ◽

Simulation And Optimization ◽

Preheating Temperature ◽

The Heat Transfer Coefficient

Numerical method was used to simulate the solidification process of zinc-aluminum alloy Zamak 5, shrinkage porosity of the zinc-aluminum alloy ingot with big diameter (114mm) was simulated using the shrinkage criterion, orthogonal test was designed to analysis the influence of different casting parameters as casting temperature, preheating temperature of the mold and the heat transfer coefficient between the mold and the environment. The result shows that the shrinkage value was minimal when the casting temperature was 480, the preheating temperature was 200 and the heat transfer coefficient was 200.

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