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.

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.

Microstructural Analysis and Tensile Properties of Squeeze Cast Al-7%Mg Alloy

2010 ◽  
Vol 643 ◽  
pp. 119-123 ◽  
Author(s):  
Crystopher Cardoso De Brito ◽  
Fabrício Dias Magalhães ◽  
André Luiz de Morais Costa ◽  
Cláudio Alves Siqueira
Keyword(s):  
Squeeze Casting ◽  
Microstructural Analysis ◽  
Casting Process ◽  
External Pressure ◽  
Mg Alloy ◽  
Structure And Properties ◽  
Structural Refinement ◽  
Squeeze Cast ◽  
Casting Alloys ◽  
Squeeze Casting Process

Squeeze casting is one of the modern casting processes, which was invented to address these shortcomings and has a high potential to produce sound casting alloys. Magnesium Alloys are the lightest structural alloys commercially available and have great potential for applications in aerospace and automobile industries. In this article, the influence of pressure variation on the microstructure and defects formation in the Al-7%Mg alloy during squeeze casting process was studied. It was observed that a small external pressure of 20 MPa promoted structural refinement and a significant increasing in the ultimate tensile strength. This improvement in structure and properties is attributed to increasing in the cooling rate during squeezing.

Microstructure and Tensile Properties of Mg-4Zn-2Sn-2Al Alloy

2013 ◽  
Vol 747-748 ◽  
pp. 398-403 ◽  
Author(s):  
Dong Qing Zhao ◽  
Xu Guang Dong ◽  
Xin En Zhang ◽  
An Jiang Gao ◽  
Ji Xue Zhou ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Tensile Properties ◽  
Aging Process ◽  
Supersaturated Solid Solution ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Solution Treated ◽  
The Matrix ◽  
Alloy Increase

The microstructures and tensile properties of as-cast, solution-treated and aged Mg-4Zn-2Sn-2Al (wt.%) alloy have been investigated. The microstructure of the as-cast alloy consists of α-Mg, Mg2Sn and Mg32(Al,Zn)49 phases. The yield tensile strength and the ultimate tensile strength of the as-cast alloy are 87.7 MPa and 241.3 MPa, respectively, and the elongation reaches to 18.8% showing excellent ductility. After solution treatment, all of the Mg32(Al,Zn)49 phase and the majority of Mg2Sn particles have dissolved into the matrix. During aging process, Mg2Sn phase precipitates from the α-Mg supersaturated solid solution. With the precipitation strengthening of Mg2Sn phase, the yield tensile strength and the ultimate tensile strength of the alloy increase to 112.5 MPa and 280.4 MPa, respectively, while, the elongation decreases to 12%.

Effect of Heat Treatment on the Microstructure of Gravity Cast and Squeeze Cast Al-Si-Mg Alloy

2015 ◽  
Vol 830-831 ◽  
pp. 164-167
Author(s):  
Arjun Bala Krishnan ◽  
Kavin Selvaraj ◽  
Akhil Madhusoodhanan Geethakumari ◽  
Ravi Manickam
Keyword(s):  
Heat Treatment ◽  
Squeeze Casting ◽  
Cast Alloy ◽  
Eutectic Silicon ◽  
Solution Treatment ◽  
A356 Alloy ◽  
Sand Cast ◽  
Squeeze Cast ◽  
Cast Alloys ◽  
Gravity Cast

The present work deals with the effect of solutionising heat treatment on the features of Al-7Si-0.3Mg (A356) alloy in terms of microstructural modifications and hardness. The microstructure of sand cast and gravity cast alloys are coarse which results in lower strength compared to the alloys cast using modern casting techniques such as squeeze casting which is used for the fabrication of near-net-shaped castings. The influence of enhanced cooling rate on the hardness and microstructure of the squeeze casting technique has been exploited in the present study. In order to optimise the heat treatment process, the microstructure of the gravity and squeeze cast alloys were compared after solution treatment. The quantitative analysis of the microstructure was carried out using an image analyser attached to the optical microscope. The aspect ratio, particle count and circularity of eutectic silicon and SDAS are measured. The squeeze cast alloy is found to have finer microstructure with enhanced properties compared to the gravity cast alloy.

Effect of Fe Content on Microstructures and Mechanical Properties of the Heat-Treated Squeeze Cast Al-5.0Cu-0.6Mn Alloy

2015 ◽  
Vol 817 ◽  
pp. 82-89 ◽  
Author(s):  
Bo Lin ◽  
Zhao Hui Lou ◽  
Jian Lei Fan ◽  
Cheng Kun Zheng ◽  
Wei Wen Zhang
Keyword(s):  
Mechanical Properties ◽  
Electron Probe ◽  
Squeeze Casting ◽  
Cast Alloy ◽  
Electron Probe Micro Analyzer ◽  
Squeeze Cast ◽  
Fe Content ◽  
Heat Treated ◽  
Microstructures And Mechanical Properties ◽  
Scanning Electron

The microstructures and mechanical properties of T5 heat-treated Al - 5.0 wt % Cu - 0.6 wt % Mn alloys with different Fe content prepared by squeeze casting were studied by tensile test, optical microscopy (OM), scanning electron microscope (SEM) and electron probe micro-analyzer (EPMA). The results showed that the dominate Fe-rich intermetallics are α (CuFe) with a few Al3(FeMn),Al6(FeMn), and α-Fe in the alloys depending on different Fe content. With the increasing Fe content continually, the ultimate tensile strength and elongation of the alloys decreased gradually. This is attributed to the increasing amount of Fe-rich intermetallics, the decrease of precipitation particles in α (Al) matrix and the increase of α (Al) dendrite size. The elongation level of 13.7% was still obtained in the squeeze cast alloy even when the Fe content was as high as 1.5%.

MICROSTRUCTURE AND TENSILE PROPERTIES OF SQUEEZE CAST Mg-Al-Ca ALLOYS

2009 ◽  
Vol 23 (06n07) ◽  
pp. 771-776 ◽  
Author(s):  
MOHSEN MASOUMI ◽  
QIANG ZHANG ◽  
HENRY HU
Keyword(s):  
Tensile Properties ◽  
Room Temperature ◽  
Base Alloy ◽  
Microstructural Analysis ◽  
Calcium Content ◽  
Grain Refining ◽  
Secondary Phases ◽  
Squeeze Cast ◽  
Alloy Am50 ◽  
Different Levels

Microstructure and tensile properties of squeeze cast Mg - Al - Ca alloys with different levels of calcium addition (AMC50X) were studied. The microstructural analysis by optical and scanning electron microscopy (SEM) shows that the squzeeze cast Mg - Al - Ca alloys contain primary α- Mg , ( Al , Mg )2 Ca and Mn - Al intermetallic while the base alloy AM50 contains primary α- Mg , β- Mg 12 Al 17 and Mn - Al intermetallic. The addition of calcium varying from 1 to 4 wt.% increases the fraction area of Ca -containing secondary phases from 9.5% to 19.5%. The experimental observation confirms also that the calcium has a grain refining effect on the base alloy AM50A. The tensile testing results indicate that, as the calcium content of AMC50X alloys increases from 0 to 4%, the ultimate tensile strength (UTS) and elongation ( E f ) decrease dramatically at room temperature as their yield strengths (YS) improves slightly. At 150°C, however, both the UTS and YS of the alloys increase with increasing the Ca content.

Processing of High Strength Magnesium Alloy with Enhanced Plasticity Using Squeeze Casting

2015 ◽  
Vol 1119 ◽  
pp. 613-616
Author(s):  
Khin Sandar Tun ◽  
Goh Chwee Sim ◽  
Xing He Tan ◽  
Kwok Weng Jimmy Chan ◽  
Wai Onn Richard Kwok ◽  
...  
Keyword(s):  
Squeeze Casting ◽  
Cast Alloy ◽  
High Strength ◽  
Alloy System ◽  
Intermetallic Phases ◽  
Good Combination ◽  
Rich Phase ◽  
Casting Technique ◽  
Squeeze Cast ◽  
High Microhardness

Crystalline Mg-Cu-Y alloy system was fabricated using the squeeze casting technique. Microstructure showed the multiphase structure composed of primary Mg rich phase distributed among the lamellae patterns, alternative layers of LPSO Mg phase and intermetallic phases. High microhardness and tensile strength of 104 HV and 223 MPa respectively were observed in the squeeze cast alloy. A good combination of compressive strength (706 MPa) and ductility (19%) was also achieved in the crystalline alloy which is unlikely to be attainable in amorphous Mg-Cu-Y system. The formation of LPSO phase in the current Mg-Cu-Y alloy mainly contributed to the high mechanical properties.

scholarly journals Study on the Effect of Casting Pressure on the Wear Resistance of Al-Si Alloy Prepared by Squeeze Casting

2012 ◽  
Vol 23 (1) ◽  
pp. 3-17
Author(s):  
Muna Khedier Abbass Muna Khedier Abbass
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Squeeze Casting ◽  
Applied Pressure ◽  
Squeeze Pressure ◽  
Densification Mechanism ◽  
Squeeze Cast ◽  
Casting Pressure

In this research the effect of applied casting pressure at constant pouring and die preheating temperatures on the microstructure and wear resistance of the squeeze cast Al-Si alloy was investigated. The results showed a refinement in the microstructure with increasing of the squeeze pressure. The results also showed that the density of the specimens decreased with application of a 7.5 MPa applied pressure, but it increased steadily for higher pressures up to 53 MPa. Increasing the squeeze pressure resulted in increasing the hardness and decreasing the wear rate. These results were explained based on the densification mechanism brought about by the application of pressure during solidification.

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