scholarly journals Solid–liquid interface dynamics during solidification of Al 7075–Al2O3np based metal matrix composites

2016 ◽  
Vol 94 ◽  
pp. 148-158 ◽  
Author(s):  
Xiao-Hui Chen ◽  
Hong Yan
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Liquid Interface ◽  
Matrix Composites ◽  
Interface Dynamics ◽  
Al 7075 ◽  
Solid Liquid Interface ◽  
Solid Liquid

Investigation of mechanical properties of SiCp reinforced Al 7075 metal matrix composites: a case study

2019 ◽  
Vol 18 ◽  
pp. 3958-3965 ◽  
Author(s):  
Diptikanta Das ◽  
Milind Sharma ◽  
Chandrika Samal ◽  
Ramesh Kumar Nayak
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Al 7075

Particle Pushing during Solidification of Metals and Alloys

2014 ◽  
Vol 783-786 ◽  
pp. 1513-1517 ◽  
Author(s):  
Meng Wang ◽  
Qin You Han
Keyword(s):  
Alloy System ◽  
Liquid Interface ◽  
Second Phase ◽  
Matrix Composites ◽  
Freezing Front ◽  
Cooling Conditions ◽  
Second Phase Particles ◽  
Solid Liquid Interface ◽  
Particle Pushing ◽  
Solid Liquid

During the solidification of a liquid containing dispersed second phase particles, particles are either rejected or engulfed by the advancing solid-liquid interface. Theories have been proposed on the mechanisms on particle pushing by a freezing front. However, the critical growth velocities predicted are much smaller than actually found experimentally. This article evaluates mechanisms on particle pushing. A specially selected alloy system, an Al-Ti-B master alloy, was chosen to evaluate particle pushing under various solidification conditions. The final distribution of the particles in ingots was examined. It is concluded that most of the particles are pushed by the dendritic solid liquid interface under cooling conditions varying a few orders of magnitude. Mechanical disturbance, such as fluid flow in the remaining liquid of the mushy zone, promotes particle pushing by the growing solid. Keywords: Particle pushing, solidification, Aluminum alloys, and metal-matrix composites

scholarly journals Investigations on Mechanical Properties of Heat-treated Aluminum 7075/Graphite Powder/Bagasse ash Hybrid Metal Matrix Composites

2019 ◽  
pp. 258-266
Author(s):  
Madhu M G ◽  
H K Shivanand ◽  
Prof Maibusab ◽  
Kiran R
Keyword(s):  
Tensile Strength ◽  
Metal Matrix Composites ◽  
Compression Strength ◽  
Metal Matrix ◽  
Testing Machine ◽  
Graphite Powder ◽  
Matrix Composites ◽  
Astm Standard ◽  
Heat Treated ◽  
Al 7075

Metal Matrix Composites (MMC’s) consist of either pure metal or an alloy as the matrix material, while the reinforcement generally a ceramic material. Aluminium composites are considered as one of the advanced engineering materials which have attracted more and more benefits. Now a days these materials are widely used in space shuttle, commercial airlines, electronic substrates, bicycles, automobiles, etc., Among the MMC’s aluminium composites are predominant in use due to their low weight and high strength. The key features of MMC’s are specific strength and stiffness, excellent wear resistance, high electrical and thermal conductivity. Hence, it is proposed to form a new class of composite. Al 7075 alloy reinforced with Graphite Powder and Bagasse ash to form MMC using Stir casting. The MMC is obtained for different composition of Graphite powder and Bagasse ash particulates (varying Graphite powder with constant Bagasse ash and varying Bagasse ash with constant Graphite powder percentage). The test specimens are prepared as per ASTM standard size by turning and facing operations to conduct tensile tests, compression tests and hardness tests. The specimens are tested for tensile strength and compression strength as per ASTM standard E8 by using universal testing machine and hardness as per ASTM standard E10 at different loads by using Brinell hardness testing machine. Through the results, it is concluded that the MMC obtained has got better tensile strength, compression strength and hardness properties when compared to non-heat-treated Al 7075 alone.

Study on Mechanical Properties of Al 7075 Hybrid Metal Matrix Composites

2015 ◽  
Vol 813-814 ◽  
pp. 230-234 ◽  
Author(s):  
T.S.A. Suryakumari ◽  
S. Ranganathan ◽  
P. Shankar
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Stir Casting ◽  
Impact Loads ◽  
Matrix Composites ◽  
Casting Method ◽  
Weight Percentage ◽  
Hybrid Metal Matrix Composites ◽  
Al 7075

The present investigation involves studying the mechanical properties of the fabricated aluminium 7075 hybrid metal matrix composites reinforced with various weight % of SiC and Al2 O3 particulates by stir casting method. The Al 7075 hybrid metal matrix composites specimen were fabricated using L9 orthogonal array. The mechanical properties like Brinell Harness (BHN), Rockwell Hardness (HRC) and impact loads were experimented. The mechanical properties like hardness and impact loads have improved with the increase in weight percentage of SiC and Al2O3 particulates in the hybrid aluminium matrix.

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