Influence of Ti, B and Sr on the microstructure and mechanical properties of A356 alloy

2010 ◽  
Vol 46 (6) ◽  
pp. 1622-1627 ◽  
Author(s):  
D. G. Mallapur ◽  
S. A. Kori ◽  
K. Rajendra Udupa
Keyword(s):  
Mechanical Properties ◽  
A356 Alloy ◽  
Microstructure And Mechanical Properties

Influence of Stirring Time and Holding Time on Microstructure and Properties of the A356 Alloy Modified by Sc

2013 ◽  
Vol 750-752 ◽  
pp. 687-690 ◽  
Author(s):  
Su Zhang ◽  
Gang Yang ◽  
Jian Hong Yi ◽  
Hong Yan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Grain Boundary ◽  
Eutectic Silicon ◽  
A356 Alloy ◽  
Holding Time ◽  
Test Results ◽  
Modification Effect ◽  
Microstructure And Mechanical Properties ◽  
Stirring Time

Effects of the holding time and the stirring time on the microstructure and mechanical properties of A356 alloy modified by Sc are researched. According to the test results, most of the eutectic silicon phases have changed to the shape of creeping point, dispersed in the grain boundary of α (Al) phase while stirring 1 minute, in which case both the tensile strength and elongation reach the highest, resulting in the best modification effect. The results also indicate that microstructure and mechanical properties of the alloy reach are the best modification effect when the melt is held 15 minute. It can be known that the optimal stirring time is 1 minute and the optimal holding time is 15 minute in the experiment condition of the work.

scholarly journals Microstructure And Mechanical Properties of Ultrasonically Processed Al-7Si Alloy / Y2O3 Nanocomposite

2021 ◽  
Author(s):  
T. Satish Kumar ◽  
Jayakrishnan Nampoothiri ◽  
S. Shalini
Keyword(s):  
Mechanical Properties ◽  
Ultrasonic Treatment ◽  
A356 Alloy ◽  
Stir Casting ◽  
Porosity Level ◽  
Aluminum Metal ◽  
Microstructure And Mechanical Properties ◽  
Aluminum Metal Matrix Composite ◽  
Alloy Addition ◽  
A356 Aluminum

Abstract The aim of the present study is to investigate the microstructure and mechanical properties of the A356 aluminum metal matrix composite reinforced with Y2O3 particles. The composite is synthesized by adding 1 and 2 vol.% of reinforcement via stir casting assisted by ultrasonic treatment (UT). Microstructural contemplates shows improvement in the dispersion of nano Y2O3 particles and decrease in the porosity level due to the ultrasound aided synthesis. The UT refines the size of the Y2O3 particles as well as helps to improve its dispersion. The secondary dendrite arm spacing of 2 vol.% Y2O3 reinforced samples with 5 min UT is found to be significantly reduced to 12 µm as compared to that of the as-cast A356 alloy. Addition of 2 vol.% of nano Y2O3 has significantly improved the hardness of the A356 alloy from 60 HV to 108 HV. A considerable increment in the YS and TS of the A356 alloy is observed with the of Y2O3 and found to further improve with UT. However, small reduction in ductility is observed with the addition of Y2O3 as well as ultrasonic treatment.

Effects of Spinning on Microstructure and Mechanical Properties of A356 Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 4014-4017 ◽  
Author(s):  
Wen Min Zhao ◽  
Xiao Fei Jia ◽  
Zhi Feng Wang ◽  
Zhi Gao Yin ◽  
Guo Yuan Xiong
Keyword(s):  
Mechanical Properties ◽  
Wall Thickness ◽  
Cast Alloy ◽  
Eutectic Silicon ◽  
Strong Dependence ◽  
A356 Alloy ◽  
Microstructure And Mechanical Properties ◽  
Parabolic Relationship ◽  
Spinning Process ◽  
Deformation Ratio

The tube-shaped parts of A356 alloy were deformed from 0% to 83% by spinning process. The microstructure and mechanical properties of A356 alloy were discussed. The results showed that as the wall thickness reduction increases, the dendrite cells of cast alloy are lengthened gradually and the average Secondary Dendrite Arm Spacing (SDAS) is reduced from 37.2μm to 23μm and eutectic silicon particles are distributed orderly along the spinning direction. The coarse acicular β-Al5FeSi is broken into many sections, and its length is reduced from 37.5μm to 12.5μm in the cross-section. The tensile strength and elongation exhibit a strong dependence upon the variation in wall thickness, with a parabolic relationship. The tensile fractured surface of parts with deformation ratio above 35% exhibits many equiaxial dimples, with intergranular ductile fracture mode.

Effects of Al-Ti-B-Sr Master Alloy on the Microstructure and Mechanical Properties of A356 Alloy

2017 ◽  
Vol 898 ◽  
pp. 131-136 ◽  
Author(s):  
Jian Hua Wu ◽  
Hou Liang Zhao ◽  
Ji Xue Zhou ◽  
Wei Hong Li ◽  
Jin Wei Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Master Alloy ◽  
A356 Alloy ◽  
Optimal Combination ◽  
Alloy Content ◽  
Refining Effect ◽  
Microstructure And Mechanical Properties ◽  
Different Content

A356 alloy was refined with a new master alloy of Al-5Ti-B-10Sr. The microstructure and mechanical properties of the refined A356 alloy with different content of master alloy (0, 0.1, 0.3, 0.5 and 0.7 wt.%) were investigated. The results show that the refining effect becomes stronger as the master alloy content increasing from 0.1 to 0.3 wt.%, and then shows slight decrement until 0.7 wt.%. An optimal combination of the tensile strength (193 MPa) and the elongation (17.8%) of as-cast A356 alloy was achieved with 0.3 wt.% of refining master alloy. Compared to the non-modified A356 alloy, the tensile strength and the elongation were improved by 10% and 242%, respectively.

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