Influence of applied pressure on microstructure and tensile properties of squeeze cast magnesium Mg–Al–Ca alloy

2011 ◽  
Vol 528 (10-11) ◽  
pp. 3589-3593 ◽  
Author(s):  
Mohsen Masoumi ◽  
Henry Hu
Keyword(s):  
Tensile Properties ◽  
Applied Pressure ◽  
Squeeze Cast ◽  
Cast Magnesium

Effect of Grain Refiner C2Cl6 on Tensile Properties of Squeeze Cast Mg Alloy AM60

2015 ◽  
Vol 1120-1121 ◽  
pp. 983-988
Author(s):  
Li Fang ◽  
Yan Da Zou ◽  
Xue Zhi Zhang ◽  
Henry Hu
Keyword(s):  
Magnesium Alloy ◽  
Tensile Properties ◽  
Squeeze Casting ◽  
Applied Pressure ◽  
Grain Refining ◽  
Grain Refiner ◽  
Squeeze Cast ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium ◽  
Magnesium Alloy Am60

In this study, the hexachloroethane (C2Cl6) as a refiner was introduced into a cylindrical squeeze casting of magnesium alloy AM60 with a diameter of 100 mm and a thickness of 25 mm. The casting was prepared under an applied pressure of 30 MPa. The results of tensile testing indicate the tensile properties for the C2Cl6-refined specimens were significantly improved over the untreated AM60 samples. Microstructure analyses with optical microscopes reveal the great grain refining capability of C2Cl6 on squeeze cast magnesium alloy AM60, which should be responsible for the enhanced tensile properties of the refined AM60.

Tensile Properties of Squeeze Cast Mg-Al-Sr Alloy under Applied Pressures

2015 ◽  
Vol 1088 ◽  
pp. 181-185
Author(s):  
Li Fang ◽  
Henry Hu ◽  
Shu Ping Wang
Keyword(s):  
Tensile Properties ◽  
Squeeze Casting ◽  
Cast Alloy ◽  
Microstructural Analysis ◽  
Applied Pressure ◽  
External Pressure ◽  
Squeeze Cast ◽  
Porosity Reduction ◽  
Alloy Increase ◽  
Porosity Measurements

The focus of this study is on development of alternative manufacturing processes for potential high temperature magnesium-aluminium-strontium alloys. The effect of external pressure on tensile properties of squeeze cast Mg-Al-Sr alloy was investigated. Four different applied levels, 0, 30, 60 and 90 MPa, were employed to exert on a Mg-6 wt.% Al – 0.5 wt.% Sr alloy during squeeze casting. The results of tensile testing indicate that the ultimate tensile strength (UTS), yield strength (YS) and elongation (Ef) of the squeeze cast Mg-Al-Sr alloy increase with increasing applied pressure level. The microstructural analysis and porosity measurements suggest that the tensile property enhancement resulting from applied pressure should be attributed to microstructure refinement and porosity reduction of the squeeze cast alloy.

Mechanical Properties Simulation of Squeeze Cast Magnesium Alloy

2011 ◽  
Vol 306-307 ◽  
pp. 1464-1467
Author(s):  
Zhi Hong Guo ◽  
Hua Hou ◽  
Shu Wei Qu
Keyword(s):  
Mechanical Properties ◽  
Squeeze Casting ◽  
Tensile Elongation ◽  
Mold Temperature ◽  
Processing Parameters ◽  
Mould Temperature ◽  
Pouring Temperature ◽  
Squeeze Pressure ◽  
Squeeze Cast ◽  
Cast Magnesium

A research program was simulated to study the effects of pouring temperature, squeeze pressure and die temperature on the tensile, elongation and hardness properties of AZ91D magnesium alloys using anycasting software. The curves with different processing parameters on mechanical properties have been painted. The results indicated that mechanical properties increased firstly, then decreased when the pouring temperature increased to 670°C, and gradually increased with the increasing of squeeze pressure. The affect laws of mould temperature are similar as ones of pouring temperature. Eventually found that the squeeze casting got better mechanical properties(σb= 225MPa, δ= 3.6%, Vickers hardness=62) on the pouring temperature 670°C, mold temperature 180°C, holding pressure 120Mpa, pressure duration 25s.

Mechanical Properties and Fracture Behavior of Indirect Squeeze-Cast A354 Alloy Using Local Pressurization

2016 ◽  
Vol 850 ◽  
pp. 502-510
Author(s):  
Hai Jun Liu ◽  
Lie Jun Li ◽  
Jian Wei Niu ◽  
Ji Xiang Gao ◽  
Xue Wen Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Fracture Behavior ◽  
Eutectic Silicon ◽  
Solidification Rate ◽  
Fracture Morphology ◽  
Shrinkage Cavity ◽  
Squeeze Cast ◽  
Ductile Mode ◽  
Eutectic Si

The effect of local pressurization on mechanical properties and fracture behavior of indirect squeeze-cast A354 alloy has been investigated. As compared to conventional process, the porosity and shrinkage cavity for heavy sectioned squeeze castings were improved by the indirect squeeze casting, while its tensile properties were inferior to other parts of the casting. That is mainly due to that inhomogeneous eutectic Si particles within strip, angular and fragment shapes distribute in bulky α-Al cells, which is caused by slower solidification rate. After T6 treatment, the fragmentation and spheroidization of the eutectic silicon happened. Under this situation, the effect of fragmentation on α-Al matrix reduced. Tensile properties of the casting (both local pressurization part and non-local pressurization part) were enhanced greatly, by 36.8% and 25.4%, respectively. Fracture analysis results show that the type of fracture morphology is changed from mixed mode of brittle cleavage and ductile to ductile mode after T6-treatment.

scholarly journals Effect of Compound Fields of Ultrasonic Vibration and Applied Pressure on the 3D Microstructure and Tensile Properties of Recycled Al-Cu-Mn-Fe-Si Alloys

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3904 ◽  
Author(s):  
Yuliang Zhao ◽  
Bo Lin ◽  
Dongfu Song ◽  
Donghai Zheng ◽  
Zhenzhong Sun ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Ultrasonic Vibration ◽  
Acoustic Streaming ◽  
Applied Pressure ◽  
Three Dimensional ◽  
Pouring Temperature ◽  
Microstructural Refinement ◽  
3D Microstructure ◽  
Dendrite Fragmentation ◽  
Solution Strengthening

The effect of compound fields of ultrasonic vibration and applied pressure (UV+AP) on three-dimensional (3D) microstructure and tensile properties of recycled Al-Cu-Mn-Fe-Si alloys was systematically studied using conventional two-dimensional (2D) microscopy, synchrotron X-ray tomography, and tensile test. The properties of UV+AP treated alloys with the pouring temperature of 740, 710 and 680 °C were compared when those alloys achieved after gravity casting. After UV+AP treatment, the alloy with pouring temperature of 710 °C show the smallest grain size. Also, the sizes of Fe-rich phases and Al2Cu are greatly reduced and their 3D morphologies are compacted. The mechanical properties of UV+AP treated alloys are relatively higher than those measured for gravity cast equivalents. This improvement can be explained by the synergistic effect of acoustic cavitation, acoustic streaming, and force-feeding, which resulted in the dendrite fragmentation, uniform solute distribution, and microstructural refinement. The Orowan strengthening and solution strengthening were identified as the main strengthening mechanisms.

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