In Situ TiB2 and Al2(Y, Gd) Particles Reinforced Magnesium Matrix Composite with Al-Ti-B Addition

2013 ◽  
Vol 312 ◽  
pp. 315-318 ◽  
Author(s):  
C.F. Fang ◽  
L.G. Meng ◽  
N.N. Wu ◽  
X.G. Zhang
Keyword(s):  
Mechanical Properties ◽  
Matrix Composite ◽  
Matrix Alloy ◽  
Tensile Tests ◽  
Solidification Structure ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Reinforced Composite ◽  
The Matrix

In-situ micro/nanosized TiB2 and Al2(Y, Gd) particles reinforced magnesium matrix composite was successfully fabricated by addition of Al-Ti-B preform into Mg-Gd-Y-Zn matrix alloy, its microstructures and properties were investigated. The results show that the introduction of Al-Ti-B preform causes the precipitation of Al2(Y, Gd) particles and the SHS synthesis of TiB2 particles which significantly refine solidification structure. The reinforced Al2(Y, Gd) particles with average sizes of 5-8 μm are uniformly distributed throughout the magnesium matrix, and have a good bond to the matrix. Tensile tests indicate that, compared with the former matrix alloy, mechanical properties of the multiple in-situ particles reinforced composite are improved all-roundly.

Corrosion behavior of in situ (TiC-TiB2)p/AZ91 magnesium matrix composites in Harrison solution

2014 ◽  
Vol 61 (5) ◽  
pp. 319-327 ◽  
Author(s):  
Mohamed Gobara ◽  
Mohamed Shamekh
Keyword(s):  
Mechanical Properties ◽  
Corrosion Behavior ◽  
Matrix Composite ◽  
Electrochemical Impedance ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Content Type ◽  
X Ray ◽  
Az91 Magnesium

Purpose – This paper aims to study both the mechanical properties and the corrosion behavior of the synthesized in situ (TiC-TiB2) particulates/AZ91 magnesium matrix composite and compare the results with that of the conventional AZ91D alloy. Design/methodology/approach – Scanning electron microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) were used to study the surface morphology and crystalline structure. Mechanical compression tests were used to investigate the mechanical performance according to ASTM E9-89a. The corrosion behavior of the synthesized magnesium alloy was examined using both electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques in dilute Harrison solutions. Findings – The microstructure of the Mg composite showed a uniform distribution of reinforcing phases. Also, the reinforcing phases were formed without residual intermediate phases. The addition of titanium and boron carbides not only enhanced the mechanical properties of the matrix but also improve its corrosion behavior. Originality/value – This is the first time that magnesium matrix composite has been to synthesized with TiC and TiB2 particulates starting from starting from Ti and B carbides powder without adding aluminium using practical and low-cost technique (in situ reactive infiltration technique). This paper studies the corrosion behavior of synthesized Mg matrix in dilute Harrison solution and compares the results with that of conventional AZ91D.

Effect of Hot Extrusion on the Microstructure of In Situ TiB2 Particulate Reinforced Magnesium Matrix Composite

2011 ◽  
Vol 675-677 ◽  
pp. 473-476 ◽  
Author(s):  
N.N. Wu ◽  
C.F. Fang ◽  
Yun Bai ◽  
L.G. Meng ◽  
Hai Hao ◽  
...  
Keyword(s):  
Matrix Composite ◽  
Hot Extrusion ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
The Matrix ◽  
Tib2 Particles ◽  
Deformation Modes ◽  
Particulate Reinforced ◽  
Main Deformation

The TiB2/AZ31 magnesium matrix composite was fabricated via self-propagating hightemperature synthesis (SHS) and then hot extruded. The influence of hot extrusion on the microstructure and property of TiB2/AZ31 composites was investigated. The results show that hot extrusion and synthesized TiB2 particles could refine the grain size obviously. The synthesized TiB2 particles are micro- and nano-sized, dispersing homogenously in the matrix. The interface between the matrix and the particles are good bonding. Meanwhile, slip and twinning are the main deformation modes during the hot extrusion. The fracture surface of hot-extruded TiB2/AZ31 magnesium matrix composite has more dimples than the as-cast AZ31 magnesium alloy. The improvement of microstructure seems to be beneficial for the fracture ductility of TiB2/AZ31 magnesium matrix composite.

Effect of ECAP on the Microstructure and Tensile Property of SiCp/AZ91 Magnesium Matrix Composite

2007 ◽  
Vol 353-358 ◽  
pp. 1342-1345 ◽  
Author(s):  
Hai Chang ◽  
Xiao Jun Wang ◽  
Ming Yi Zheng ◽  
Kun Wu
Keyword(s):  
Elevated Temperature ◽  
Matrix Composite ◽  
Matrix Alloy ◽  
Grain Boundary Sliding ◽  
Ultimate Tensile Stress ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
The Matrix ◽  
Az91 Magnesium ◽  
Sic Particle

Magnesium matrix composite reinforced with SiC particle was fabricated by compocasting method. The SiCp/AZ91 composite was extruded initially, then subjected to ECAP. The microstructure and tensile properties of the composite at ambient and elevated temperature were investigated. After ECAP, the matrix alloy was significantly refined due to the dynamic recrystallization occurred during ECAP. Both the ambient yield stress and ultimate tensile stress of SiCp/AZ91 were increased after 1-pass and 2-pass ECAP and decreased after 4-pass ECAP. The ECAP processed composite exhibited superplasticity at elevated temperature, which is mainly due to the grain refinement of matrix alloy. The dominant deformation mechanism of the ECAPed composite at high temperature was grain boundary sliding. However, the sliding was prohibited due to the present of SiC particle.

scholarly journals Fabrication and Properties of Magnesium Matrix Composite Reinforced by Carbon Nanotubes-Alumina Hybrid Reinforcements

2017 ◽  
Vol 26 (5) ◽  
pp. 096369351702600
Author(s):  
Y J Li ◽  
X W Sun ◽  
J W Fan ◽  
B E Li ◽  
H C Cao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Matrix Composite ◽  
Performance Test ◽  
Chemical Vapour ◽  
Ni Catalyst ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Powder Metallurgy Process

Magnesium matrix composite reinforced by carbon nanotubes (CNTs)-Al2O3 hybrid reinforcements was successfully fabricated by a novel process. CNTs-Al2O3 in-situ mixture was synthesized by directly growing CNTs on Al2O3 particles acting as the carrier of Ni catalysts via chemical vapour deposition. The influences of Ni catalyst content on the morphology, structure and yield of CNTs were investigated. By powder metallurgy process, the CNTs-Al2O3 in-situ mixture was dispersed in Mg powder to fabricate the CNTs-Al2O3 synergistically reinforced Mg matrix composite. The performance test results showed that, the Mg matrix composite possessed improved mechanical properties, and the strengthening effects of CNTs-Al2O3 in-situ mixture were prior to those of single CNTs or Al2O3 reinforcement. The improvement of mechanical properties was due to that the introduction of Al2O3 can promote the dispersion of CNTs in Mg matrix and improve the interfacial bonding between CNTs and Mg.

Microstructure and Mechanical Properties of AIN Particles Reinforced Magnesium Matrix Composites with In Situ Synthesis Process

2016 ◽  
Vol 256 ◽  
pp. 181-185
Author(s):  
Zhao Hui Wang ◽  
Bo Li ◽  
Xian Du ◽  
Ke Liu ◽  
Shu Bo Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructural Analysis ◽  
Matrix Alloy ◽  
Strengthening Mechanism ◽  
Synthesis Process ◽  
Matrix Composites ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites ◽  
The Matrix

In this paper, In Situ AlN particles reinforced magnesium matrix composites were fabricated. The results show that the AlN phases can be In Situ synthesized in AZ91D alloy with the addition of Mg3N2. The microstructure and phases of the matrix alloys and the composites were investigated by OM, SEM and XRD. The hardness and mechanical properties of the matrix alloys and the composites were also obtained. Compared with those of the matrix alloy, the grains of composites were refined obviously and the mechanical properties of composites were improved significantly. The microstructural analysis indicates that the AlN particles can act as the heterogeneous nucleation of α-Mg phases in the composites. The strengthening mechanism of the composites with AlN particles was discussed.

Study on Mechanical Property of Aluminium 6061 with E Glass Fiber Reinforced Composite

2018 ◽  
Vol 877 ◽  
pp. 50-53 ◽  
Author(s):  
Vinayashree ◽  
R. Shobha
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
High Strength ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Reinforced Composite ◽  
Reinforcement Content ◽  
Glass Fiber Reinforced ◽  
The Matrix ◽  
Glass Fibre Reinforced

Aluminium composites are in predominant use due to their lower weight and high strength among the MMC’s. Aluminium 6061 is selected as matrix and E-glass fiber is selected as reinforcement. Fabrication of composite is done by stir casting method. Each fabrication carries the E-glass reinforcement content varied from 2% to 10%. The present article attempts to evaluate the mechanical properties of E-glass fibre reinforced composite and study the effect of reinforcement on the matrix alloy through mechanical properties. When compared to ascast mechanical properties the UTS has increased from 74.28 N/sq mm to 146.8 N/sq mm for a composite at 6% E-glass. The hardness of as-cast has also increased from 22 RHB to 43 RHB at 6% E-glass and the wear of composite has exhibited a decreasing tend with increase in reinforcement content along the sliding distance. The results are analyzed in certain depth in the current paper. The mechanical properties of composites have improved with the increase in the weigh percentage of glass fiber in the aluminium matrix.

scholarly journals Processing of RZ5-10wt%TiC in-situ magnesium matrix composite

2018 ◽  
Vol 6 (1) ◽  
pp. 100-105 ◽  
Author(s):  
Deepak Mehra ◽  
M.M. Mahapatra ◽  
S.P. Harsha
Keyword(s):  
Matrix Composite ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix
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