scholarly journals Characterization of Iron-Matrix Composites Reinforced by In Situ TiC and Ex Situ WC Fabricated by Casting

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 862
Author(s):  
Aida B. Moreira ◽  
Laura M. M. Ribeiro ◽  
Pedro Lacerda ◽  
Manuel F. Vieira
Keyword(s):  
Mechanical Properties ◽  
Base Metal ◽  
Microstructural Analysis ◽  
Base Material ◽  
Ex Situ ◽  
Homogeneous Distribution ◽  
Matrix Composites ◽  
Iron Matrix ◽  
In Situ Tic

In this study, the effect of microstructural characteristics on the mechanical properties of high-chromium white cast iron-matrix composites reinforced by in situ TiC and ex situ WC was investigated. To this end, two different powder mixtures (Ti + Al + graphite and WC + Fe) were compressed to produce green compacts that were inserted into the mold, before casting. The microstructure of the resulting composites and the base metal was characterized using optical microscopy (OM) and scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS). The microstructural analysis revealed a sound bonding between the composite zone and the base metal. The reinforcement with WC particles showed a homogeneous distribution of the carbide particles, unlike the reinforcement with TiC particles. The mechanical properties of the reinforcements were evaluated using hardness and ball-cratering micro-abrasion tests. The results showed that both reinforcements increase the hardness and wear performance of the base material, which was the best performance achieved by the reinforcement with WC particles.

scholarly journals Characterization of in Situ Zirconium Diboride (Zrb2) Reinforced by Aluminium-Copper (Al-Cu) Metal Matrix Composites

2019 ◽  
Vol 7 (4.14) ◽  
pp. 406
Author(s):  
N. H. Mustafa ◽  
N. N. A. Basir ◽  
R. E. Ibrahim ◽  
M. M. Mahat ◽  
N. N. Bonnia ◽  
...  
Keyword(s):  
Phase Distribution ◽  
Microstructural Analysis ◽  
Metallic Matrix ◽  
Ex Situ ◽  
Homogeneous Distribution ◽  
Second Phase ◽  
Matrix Composites ◽  
In Situ Reaction ◽  
Clean Interface

Aluminium matrix composites by way of in-situ reaction has arisen as a preference conducive to knock out imperfections and defects exiting within ex situ MMC. In the present work, Al-Cu-ZrB2 have been develop through in situ reaction which boost mechanical properties over dispersion strengthening together with grain refinement obtained by the existence of each particulates inside the melt all along solidification. Al-Cu reinforced among different proportion of ZrB2 (0, 3 and 6 wt. %) synthesized using in situ fabrication at 800 °C of molten aluminum-copper alloys by inorganic salts K2ZrF6 together with KBF4. The amalgam were specified using XRD, FESEM together with mechanical test on appropriately sectioned and metallographically prepared surface to examine and inspect phase distribution, hardness together with tensile properties. From result acquired, raised ZrB2 amount will increase rate of tensile and hardness characteristics of Al-Cu alloy. XRD patterns exposed development of ZrB2 particulates without existence of unspecified other compounds. Most of ZrB2 granular were located near grain boundaries of Al dendrites. Microstructural analysis exposed the homogeneous and consistent allocation of second phase particles, clean interface and favorable bonding. It is support that ZrB2 molecules are predominantly in nano size among hexagonal either tetragonal shape, yet minor molecules in micron size are also noticed. For that reason, composite synthesized using in situ techniques exhibit homogeneous distribution of reinforcing tend to be superlative associated within clean interface along the metallic matrix. In order to accomplish better mechanical features, it is necessary to regulate and control phase arrangement all along fabrication of Al-Cu with higher contents of ZrB2.  

Fabrication and mechanical properties of in situ TiC/Ti metal matrix composites

2011 ◽  
Vol 509 (8) ◽  
pp. 3592-3601 ◽  
Author(s):  
Liu Yanbin ◽  
Liu Yong ◽  
Tang Huiping ◽  
Wang Bin ◽  
Liu Bin
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
In Situ Tic

Correlation between the Enhanced Plasticity of Glassy Matrix Composites and the Volume Fraction, Size and Intrinsic Mechanical Property of Reinforcements

2014 ◽  
Vol 783-786 ◽  
pp. 1967-1970
Author(s):  
Z.H. Chu ◽  
Hidemi Kato ◽  
Guo Qiang Xie ◽  
D.R. Yan ◽  
Guang Yin Yuan
Keyword(s):  
Mechanical Properties ◽  
Metallic Glasses ◽  
Volume Fraction ◽  
Shear Bands ◽  
Ex Situ ◽  
Glassy Matrix ◽  
Matrix Composites ◽  
Micro Scale ◽  
Fraction Size

In recent years, bulk metallic glasses (BMGs) have received considerable attention due to their unique mechanical properties. However, the deformation of BMGs is highly localized in a few shear bands so that many of them exhibit poor plasticity. As such, more and more researchers have focused on improving the plasticity by in-situ or ex-situ introducing of nanoor micro-scale crystalline phases into the metallic glassy matrix in order to formation of multiple shear bands.

Synthesis of Al-Al3Ti In Situ Metal Matrix Composites by Salt Route and Evaluation of their Mechanical Properties

2014 ◽  
Vol 984-985 ◽  
pp. 280-284 ◽  
Author(s):  
S.A. Kori ◽  
S.L. Biradar ◽  
Virupaxi Auradi
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Microstructural Characterization ◽  
Homogeneous Distribution ◽  
Matrix Composites ◽  
Commercial Purity Aluminum ◽  
Microstructural Studies

Current work, aims at preparation and characterization of Al-Al3Ti in-situ metal matrix composites with varying percentage of in-situ Al3Ti (3 and 5%) reinforcement. The composites were prepared by the salt route involving reaction of commercial purity aluminum (99.7%) and potassium titanium flourate halide (K2TiF6) salt at a reaction temperature of 800°C and with 60min. holding time. The prepared composites were subjected to microstructural studies using Scanning Electron Microscope. Further, the work aims at evaluating mechanical properties of the prepared composites as per ASTM standards. Microstructural characterization using SEM revealed blocky morphology of Al3Ti intermetallics with fairly homogeneous distribution. Insitu Al-Al3Ti composites have shown better mechanical properties when compared to the unreinforced Al matrix.

Excellent mechanical properties of in-situ TiC/FeCrNiCuV0.1 high entropy alloy matrix composites

2019 ◽  
Vol 257 ◽  
pp. 126729 ◽  
Author(s):  
Hao Wu ◽  
Sirui Huang ◽  
Chengyan Zhu ◽  
Heguo Zhu ◽  
Zonghan Xie
Keyword(s):  
Mechanical Properties ◽  
High Entropy Alloy ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
High Entropy ◽  
In Situ Tic
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