scholarly journals Microstructure and mechanical characteristics of an in-situ synthesis of AA7075/TiB2 metal matrix composite

2021 ◽  
Vol 309 ◽  
pp. 01149
Author(s):  
Rahul Das ◽  
Duryodhan Sethi ◽  
Barnik Saha Roy
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Intermediate Phase ◽  
Tensile Specimen ◽  
Stir Casting ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
In Situ Reactions

In the present study, AA7075/TiB2 aluminium metal matrix composite (AMCs) was prepared by stir casting method using in-situ reactions of inorganic salts KBF4 and K2TiF6. In this process AA7075 alloy is reinforced with different weighted percentages of (5 %wt, 10 %wt, and 15 %wt) Titanium Diboride (TiB2) particles. X-ray Diffraction (XRD) investigation reveals the presence of TiB2 particles without any formation of the intermediate phase. An optical microscope was used to examine the microstructure, which revealed that the TiB2 particles are equally distributed and that grain size reduces as the weighted percentage of reinforcement particles increases. When the weighted percentage of TiB2 reinforcement particles increased, the microhardness and ultimate tensile strength of the AA7075/TiB2 AMCs increased. Furthermore, the ductile mode of failure of the tensile specimen has been observed by fractography analysis.

scholarly journals In Situ Stress Tensor Determination during Phase Transformation of a Metal Matrix Composite by High-Energy X-ray Diffraction

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1415 ◽  
Author(s):  
Guillaume Geandier ◽  
Lilian Vautrot ◽  
Benoît Denand ◽  
Sabine Denis
Keyword(s):  
Phase Transformation ◽  
Stress Tensor ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
High Energy ◽  
X Ray Diffraction ◽  
Synchrotron Source ◽  
X Ray

In situ high-energy X-ray diffraction using a synchrotron source performed on a steel metal matrix composite reinforced by TiC allows the evolutions of internal stresses during cooling to be followed thanks to the development of a new original experimental device (a transportable radiation furnace with controlled rotation of the specimen). Using the device on a high-energy beamline during in situ thermal treatment, we were able to extract the evolution of the stress tensor components in all phases: austenite, TiC, and even during the martensitic phase transformation of the matrix.

Microstructural Studies of Aluminium 7075-Silicon Carbide-Alumina Metal Matrix Composite

2014 ◽  
Vol 984-985 ◽  
pp. 194-199 ◽  
Author(s):  
B. Rajeswari ◽  
K.S. Amirthagadeswaran ◽  
K. Ramya
Keyword(s):  
Silicon Carbide ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Stir Casting ◽  
Optical Microscope ◽  
Homogeneous Distribution ◽  
Modern Development ◽  
Al 7075 ◽  
Composite Samples

The modern development in the field of science and technology has created a demand for many advanced engineering materials. In recent days, aluminium related metal matrix composite is a probable material for many applications such as transport, aerospace, marine and automobile applications. In this paper, experiments were conducted on composite having various weight fractions of SiC and Al2O3particulates fabricated by stir casting method. Characterization studies were conducted on the Al 7075 alloy and composite samples to assess the hardness and microstructural properties. Final samples were tested for hardness using vickers hardness machine. Microstructure examination was conducted by optical microscope. Microstructure of the composite samples reveals the presence and homogeneous distribution of reinforcements in the Al 7075 matrix. The hardness of aluminium metal matrix composites was increased due to the addition of silicon carbide and alumina reinforcements.

Mechanical Properties of Copper-TiC In Situ Metal Matrix Composite

2015 ◽  
Vol 787 ◽  
pp. 593-597 ◽  
Author(s):  
S. Harish ◽  
R. Keshavamurthy
Keyword(s):  
Diffraction Analysis ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Graphite Powder ◽  
Copper Matrix ◽  
X Ray Diffraction ◽  
X Ray ◽  
Casting Technique

Copper based TiC reinforced in-situ metal matrix composite was synthesized by melting copper, hexaflurotitanate and graphite powder in appropriate proportion at a temperature of 1100 °C using stir casting technique. Both copper matrix and copper-TiC composite were subjected to microstructure studies, x-ray diffraction analysis, hardness and tensile test. Optical micrograph shows fine and uniform distribution of TiC particles throughout the matrix. X-ray diffraction analysis confirms the formation of Titanium carbide particles. Developed composite exhibit a significant improvement in hardness and ultimate tensile strength compared with unreinforced copper.

In Situ Metal Matrix Composite Surfacing by Laser Surface Alloying

2011 ◽  
Vol 227 ◽  
pp. 84-91
Author(s):  
Jyotsna Dutta Majumdar
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Composite Layer ◽  
Metallic Matrix ◽  
Surface Region ◽  
Present Contribution ◽  
Near Surface ◽  
In Situ Reactions

Laser as a source of focused energy may be applied for the modification of microstructure and/or composition of the near surface region of a component. The technique may be applied for the development of a ceramic/intermetallics/interstitial compound dispersed metal matrix composite layer on the surface of metallic substrate by melting the substrate with a high power laser and simultaneous addition of alloy powders for the development of metal matrix composite layer by in-situ reactions. In the present contribution, development of metal-dispersed and intermetallic-dispersed matrix composite layer on the surface of metallic matrix has been discussed with a suitable example of its application.

scholarly journals Manufacturing Feasibility of Al6061and Boron Carbide Particulate Reinforcement to Cast a Metal Matrix Composite with Wettability Agent

2019 ◽  
Vol 9 (2) ◽  
pp. 4910-4914
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Casting Process ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Optical Microscope ◽  
Alloy Matrix ◽  
Casting Technique ◽  
Base Matrix

Aluminium metal matrix composite with a combination of Al6061 as base matrix and B4C as particulate up to 0 to 3% by weight in the steps of 1 wt% is manufactured by liquid metallurgy method by stir casting process. The choice of the process has been concluded from the literature survey and is tabulated. The steps involved in the processing of composite have been reported in detail. A conventional stir casting technique and the steps followed are recorded. The different process parameters controlled during the process have been reported. With the processing of the composite, the chemical stability between the particulate and the alloy matrix as known from its properties has been ascertained. The addition of wettability agent and thus its effect has been discussed. The optical microscope images of the processed composite have been presented in the paper as an indication to successful fabrication of composite. Based on the images, distribution of particulates in matrix alloy and possible reasons for this to get exhibited have been discussed. The paper aims at bridging the gap of essentials of wetting of solid particulates and the practice of casting.

Corrosion Behavior of AA2014/SiC Metal Matrix Composite Fabricated by Stir Casting Process

2016 ◽  
Vol 4 (3) ◽  
pp. 1
Author(s):  
PRAKASH DWIVEDI SHASHI ◽  
SHARMA ANAND ◽  
PRATAP RAO SHASHANK ◽  
BAHUGUNA SUMIT ◽  
◽  
...  
Keyword(s):  
Metal Matrix Composite ◽  
Corrosion Behavior ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Casting Process ◽  
Stir Casting
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