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.

scholarly journals Microstructural Evolution and Strain Development in Metal Matrix Composites

2014 ◽  
Vol 996 ◽  
pp. 936-943 ◽  
Author(s):  
Guillaume Geandier ◽  
Lilian Vautrot ◽  
Matthieu Salib ◽  
Mickael Mourot ◽  
Moukrane Dehmas ◽  
...  
Keyword(s):  
Mass Fraction ◽  
High Energy ◽  
Elastic Stiffness ◽  
Steel Matrix ◽  
Matrix Composites ◽  
Mechanical State ◽  
X Ray Diffraction ◽  
Strain Development ◽  
X Ray ◽  
Cell Parameters

Composite materials present interesting mechanical properties. The metal provides the toughness and the particles are adding elastic stiffness, strength, hardness and wear resistance. High energy X-ray diffraction has been used to characterize the microstructure evolution of two types of MMCs (titanium and steel matrix) reinforced with TiC particles.Evolutions of mass fraction and mean cell parameters shows the effect of reinforcement on the kinetics and mechanical state of the final composites.

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.

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.

Effect of TiB2 particle addition on the mechanical properties of Al/TiB2 in situ formed metal matrix composites

2018 ◽  
Vol 60 (12) ◽  
pp. 1221-1224 ◽  
Author(s):  
Balachandran Gobalakrishnan ◽  
P. Ramadoss Lakshminarayanan ◽  
Raju Varahamoorthi
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tib2 Particle ◽  
Matrix Composites ◽  
Particle Addition

Wear testing of in situ cast AA8011-TiB2 metal matrix composites

2019 ◽  
Vol 61 (8) ◽  
pp. 779-786
Author(s):  
Bellamballi Munivenkatappan Muthami Selvan ◽  
Veeramani Anandakrishnan ◽  
Muthukannan Duraiselvam ◽  
Sivaraj Sundarameenakshi
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Wear Testing ◽  
Matrix Composites

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.

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