Microstructure and Mechanical Characterization of Al-Tib2 In Situ Metal Matrix Composites Produced via Master Alloy Route

2014 ◽  
Vol 592-594 ◽  
pp. 494-498 ◽  
Author(s):  
V. Auradi ◽  
S.L. Biradar ◽  
S.M. Suresha ◽  
S.A. Kori
Keyword(s):  
Metal Matrix Composites ◽  
Master Alloy ◽  
Metal Matrix ◽  
Microstructural Characterization ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
C 30 ◽  
Al Matrix

In the present work, Al-TiB2in-situ metal matrix composites were processed via master alloy route at 800°C-30 min. with 5 and 7wt% of TiB2particles. Microstructural characterization of the prepared insitu composites were carried out using XRD, SEM/EDX studies. X ray diffraction studies have shown the presence of Al3Ti and TiB2phases, however, the presence of AlB2particles is also highly likely. SEM/EDX characterization revealed fairly uniformly distributed TiB2particles having hexagonal morphology with size distribution in the ranges between 0.5-10μm. Further, presence of TiB2particles in Al matrix have resulted in improvement in hardness and tensile properties of the Al matrix while decrease in ductility was observed.

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.

Microstructural characterization of interpenetrating light weight metal matrix composites

2009 ◽  
Vol 518 (1-2) ◽  
pp. 118-123 ◽  
Author(s):  
F. Scherm ◽  
R. Völkl ◽  
S. van Smaalen ◽  
S. Mondal ◽  
P. Plamondon ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Microstructural Characterization ◽  
Light Weight ◽  
Matrix Composites

scholarly journals Internal Stresses in Metal Matrix Composites in Relation with Matrix Phase Transformations

2014 ◽  
Vol 996 ◽  
pp. 944-950
Author(s):  
Lilian Vautrot ◽  
Guillaume Geandier ◽  
Mickael Mourot ◽  
Moukrane Dehmas ◽  
Elisabeth Aeby-Gautier ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Energy ◽  
Internal Stresses ◽  
Steel Matrix ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Cell Parameters ◽  
Key Factor

For metal matrix composites, internal stresses are a key factor for understanding the interactions between matrix and reinforcements and the mechanical properties of the composite. From in situ high energy X-ray diffraction on a steel matrix composite reinforced with TiC, the evolutions of the phase fractions and mean cell parameters of each phase during thermal treatment have been determined. In addition, a methodology is developed in order to get more information on the stress state evolutions in each phase during the treatment.

Microstructure of In Situ Mg Metal Matrix Composites Based on Silica Nanoparticles

2012 ◽  
Vol 191 ◽  
pp. 189-198 ◽  
Author(s):  
Anita Olszówka-Myalska ◽  
Sam A. McDonald ◽  
Philip J. Withers ◽  
Hanna Myalska ◽  
Grzegorz Moskal
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Silica Nanoparticle ◽  
Matrix Composites ◽  
Strengthening Mechanisms ◽  
X Ray Diffraction ◽  
Magnesium Matrix ◽  
Powder Mixtures ◽  
X Ray

Metal matrix composites comprising a magnesium matrix and Mg2Si/MgO dispersoids obtained by hot pressing silica nanoparticle agglomerates and metal powder in a Degussa press were characterized. Two powder mixtures having weight proportions of Mg:SiO2 of 10:0.3 and 10:1 were identically sintered. Their microstructures were characterized by optical microscopy and X-ray diffraction. The size and distribution of the Mg2Si and MgO dispersoids formed in situ were assessed as a function of the original nanosilica content. The behaviour of the composites under compression testing was assessed in 3D by X-ray microtomography using 225kV Nikon X-tek and 150kV Xradia MicroXCT scanners. This provided insights into composite strengthening mechanisms and matrix particle decohesion.

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