Enhanced strength and ductility of high pressure die casting AZ91D Mg alloy by using cold source assistant friction stir processing

2017 ◽  
Vol 190 ◽  
pp. 24-27 ◽  
Author(s):  
Nan Xu ◽  
Yefeng Bao ◽  
Jun Shen
Keyword(s):  
High Pressure ◽  
Friction Stir Processing ◽  
Die Casting ◽  
Mg Alloy ◽  
High Pressure Die Casting ◽  
Friction Stir ◽  
Cold Source ◽  
Pressure Die Casting ◽  
Strength And Ductility

Process optimization for high pressure die casting of marine propeller with a hypoeutectic Al-Si-Mg Alloy

2016 ◽  
Vol 113 (4) ◽  
pp. 402
Author(s):  
Weibing Kong ◽  
Zhi Wang ◽  
Changsheng Guo ◽  
Xinping Hu ◽  
Henry Hu ◽  
...  
Keyword(s):  
High Pressure ◽  
Process Optimization ◽  
Die Casting ◽  
Mg Alloy ◽  
Marine Propeller ◽  
High Pressure Die Casting ◽  
Pressure Die Casting

Three-Dimensional Microstructure Reconstruction and Finite Element Simulation of Gas Pores in the High-Pressure Die-Casting AZ91 Mg Alloy

2015 ◽  
Vol 21 (6) ◽  
pp. 1420-1425 ◽  
Author(s):  
Wei Jiang ◽  
Zhanyi Cao ◽  
Xu Sun ◽  
Haifeng Liu
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
High Pressure ◽  
Finite Element Simulation ◽  
Die Casting ◽  
Three Dimensional ◽  
Mg Alloy ◽  
High Pressure Die Casting ◽  
Element Simulation ◽  
Pressure Die Casting

AbstractHigh-pressure die-casting (HPDC) AZ91 tensile specimens were used to investigate characteristics of gas pores and their effects on mechanical properties of HPDC AZ91 magnesium (Mg) alloy. Combining the stereoscopic morphology of gas pores obtained from a three-dimensional (3D) reconstruction technique with the experimental data from uniaxial tensile testing, we worked on finite element simulation to find the relationship between gas pores and the mechanical properties of HPDC AZ91 Mg alloy. Results indicate that the 2D metallography images have one-sidedness. Moreover, gas pores >100 µm in the center region have a remarkable negative influence on the ultimate tensile strength (UTS) and elongation. With an increase in the size of large gas pores in the center region, the UTS and elongation of the material decreases. In addition, the distribution of gas pores in the specimens and the areal fraction of gas pores >100 µm on cross sections can also affect the UTS and elongation to some extent.

Effect of Gas Pores on Mechanical Properties of High-Pressure Die-Casting AM50 Magnesium Alloy

2016 ◽  
Vol 22 (4) ◽  
pp. 814-819
Author(s):  
Wei Jiang ◽  
Zhanyi Cao ◽  
Liping Liu ◽  
Bo Jiang
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Magnesium Alloy ◽  
3D Reconstruction ◽  
Die Casting ◽  
Mg Alloy ◽  
Uniaxial Tensile ◽  
High Pressure Die Casting ◽  
Areal Fraction ◽  
Pressure Die Casting

AbstractHigh-pressure die-casting (HPDC) AM50 tensile specimens were used to investigate characteristics of gas pores and its effect on mechanical properties of HPDC AM50 magnesium alloy. Combining microstructure morphology gained from optical microscopy, scanning electron microscopy (SEM), and three-dimensional (3D) reconstruction with the experimental data from uniaxial tensile testing, we pursued the relationship between gas pores and the mechanical properties of HPDC AM50 Mg alloy. Results indicate that comparing with 3D reconstruction models, 2D images like optical metallography images and SEM images have one-sidedness. Furthermore, the size and maximum areal fraction of gas pores have negative effects on the mechanical properties of HPDC AM50 Mg alloy. With increase of the maximum size of gas pores in the specimen, the ultimate tensile strength (UTS) and elongation decrease. In addition, with the maximum areal fraction becoming larger, both the UTS and elongation decrease linearly.

A Development of Virtual Manufacturing System for Magnesium High Pressure Die Casting Processes

Materials ◽  
2003 ◽  
Author(s):  
Weilong Chen
Keyword(s):  
High Pressure ◽  
Magnesium Alloys ◽  
Die Casting ◽  
Virtual Manufacturing ◽  
Mold Design ◽  
High Pressure Die Casting ◽  
Molten Magnesium ◽  
Pressure Die Casting ◽  
Soft And Hardware ◽  
Free Magnesium

In recent years, high-pressure die-casting magnesium components have been gaining currency worldwide because of the excellent properties that magnesium alloys can offer to meet new product requirements. With the increasing application of magnesium parts worldwide, many research and development projects have been carried out to advance HPDC technology. However, truly optimized mold design and production of defect free castings remains a challenge for die casters. For many HPDC magnesium products, especially those specified for porosity-free and high cosmetic requirement, the challenge not only comes form a lack of a deeper understanding of how molten magnesium alloys fill the mold cavity and form defects, but also from improper preliminary part design. This study proposes a virtual prototyping system that integrates several effective soft and hardware tools for both the part and mold-design engineer to evaluate part manufacturability. Also, investigated in this study are the major causes of those defects that are the predominant cause of rejection of thin walled, leak-free magnesium parts requiring highly cosmetic finishes.

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