The reinforcement of an age-hardenable Al–Cr matrix alloy in situ and by SiC/Al2O3 particles: tailoring of the interface

2000 ◽  
Vol 60 (3) ◽  
pp. 451-456 ◽  
Author(s):  
S. Datta ◽  
N.R. Bandyopadhyay ◽  
S. Bandyopadhyay ◽  
M.K. Banerjee
Keyword(s):  
Matrix Alloy ◽  
Al2o3 Particles

The contribution of friction stress to the creep behaviour of the nickel-base in situ composite, γ—γ'-Cr 3 C 2

1980 ◽  
Vol 373 (1752) ◽  
pp. 93-109 ◽  
Keyword(s):  
Activation Energy ◽  
Creep Behaviour ◽  
Friction Stress ◽  
Matrix Alloy ◽  
Dislocation Motion ◽  
Self Diffusion ◽  
The Matrix ◽  
Nickel Base ◽  
Distribution Of Stress

Transient creep following stress reductions has been analysed by the method described by McLean (1980) to determine the friction stress σ 0 as a function of temperature and directional solidification conditions for the γ-γ'-Cr 3 Cr 2 in-situ composite and for the γ-γ' matrix alloy. These values of σ 0 are identical to the flow stresses at creep strain rates and can be identified with the sums of the barriers to dislocation motion through the matrix by climb around γ'-particles and Orowan bowing between the carbide fibres. The friction stress and the kinetics of deformation of the composite are determined by the matrix behaviour, whereas its creep strength depends on the distribution of stress between fibre and matrix. When the steady-state creep behaviour of γ-γ'-Cr 3 C 2 is analysed by using the usual power law description in terms of the effective stress σ — σ 0 , rather than the applied stress σ, the stress exponent is ca 4 and the activation energy is similar to the activation energy of self-diffusion for nickel. The results provide strong evidence for the operation of recovery-creep in both the composite and matrix alloys.

Effect of in situ γ-Al2O3 particles on the microstructure of hypereutectic Al–20%Si alloy

2013 ◽  
Vol 577 ◽  
pp. 232-236 ◽  
Author(s):  
Qinglin Li ◽  
Tiandong Xia ◽  
Yefeng Lan ◽  
Wenjun Zhao ◽  
Lu Fan ◽  
...  
Keyword(s):  
Al2o3 Particles

Study of Wear Properties of In Situ TiB/TiC Reinforced Ti1100 Composites

2013 ◽  
Vol 550 ◽  
pp. 107-113
Author(s):  
Xiao Lu Gong ◽  
Fei Zhao ◽  
Di Zhang
Keyword(s):  
Shear Stress ◽  
Wear Debris ◽  
Matrix Alloy ◽  
Stress Distributions ◽  
Wear Properties ◽  
Wear Process ◽  
The Matrix ◽  
Pin On Disc ◽  
Worn Surface

The tribological performances of in-situ (TiB + TiC) / Ti1100 composites prepared by casting and the matrix alloy were tested by pin-on disc mode. The worn surface and wear debris were investigated by SEM. The models of the composites during the wear process were simulated by ABAQUS FEA software. The analysis shows the stress distributions inside the composites under the different shear stress. The wear mechanism of the composites is probed.

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.

Microstructure and Wear Properties of TiC/7075 Composites by In Situ Reaction Liquidus Curve Casting Method

2011 ◽  
Vol 675-677 ◽  
pp. 1121-1124 ◽  
Author(s):  
Ping Xu ◽  
Feng Wang ◽  
Hui Min Liu ◽  
Xiang Dong Liu
Keyword(s):  
Wear Resistance ◽  
Wear Mechanism ◽  
Matrix Alloy ◽  
Liquidus Curve ◽  
Sem Analysis ◽  
Wear Properties ◽  
Casting Method ◽  
Low Load ◽  
Cast Microstructure

7075 matrix alloy was fabricated by in-situ reaction liquidus curve casting method, and its as-cast microstructure was analyzed, the wear properties of these composites and matrix alloy were studied under the different conditions. The results show that the wear resistance of TiC/7075 composites is superior to 7075 matrix alloy in the same conditions (with same load or rotating velocity). Because of introduction of particle reinforcements, the wear resistance of the composite is enhanced by 1.5～4 times than that of its matrix. In addition, the wear mass loss of TiC/7075 composites increases almost with increase of load, but decreases with increase of rotating velocity. The wear resistance of the composites increases slightly at low load and high rotating velocity. The SEM analysis of the worn-out surface indicates that the wear mechanism of TiC/7075 composites is mainly abrasive wear.

Titanium Carbide Particulate Reinforced Titanium Based Composite by In Situ Process

2007 ◽  
Vol 539-543 ◽  
pp. 1010-1015
Author(s):  
Myoung Gyun Kim ◽  
Young Jig Kim
Keyword(s):  
Titanium Carbide ◽  
Carbide Particle ◽  
Matrix Alloy ◽  
In Situ Synthesis ◽  
Liquid Alloys ◽  
Synthesis Reaction ◽  
Titanium Matrix ◽  
Particulate Reinforced ◽  
Dendritic Shape

Titanium carbide particle reinforced titanium composites were prepared by in-situ synthesis reaction between titanium and carbon liquid alloys. The phases constitute and microstructures of titanium composite have been investigated by OM, XRD, SEM, EPMA and TEM. Although it was possible to synthesize titanium carbide particle reinforced titanium composites, the morphology of in-situ titanium carbide grows into typically dendritic shape due to the compositional supercooling theory. The observation of TEM also show that interfaces between the reinforcements and the titanium matrix alloy are very clean.

Study on the Production of Metal Matrix Composite Layer by Laser Melt Injection Technology

2007 ◽  
Vol 537-538 ◽  
pp. 177-184 ◽  
Author(s):  
Viktória Janó
Keyword(s):  
Ceramic Powder ◽  
Composite Layer ◽  
Steel Matrix ◽  
Ceramic Phase ◽  
Carbon Steel Surface ◽  
Metal Ceramic ◽  
Al2o3 Particles ◽  
Injection Technology ◽  
Effect Of Surface

In-situ synthesized Al2O3 reinforced metal-ceramic composite coating was fabricated on lowalloyed carbon steel surface by laser cladding. Injection of the ceramic powder into the melted surface can be difficult due to the effect of surface tension and to the lower density of the Al2O3 particles, compared to that of the steel matrix. These difficulties can be avoided by the in-situ synthesis of Al2O3 particles in the liquid steel matrix. In this paper, the results of experiments performed by laser beam will be introduced, together with the interpretation of these results. Experiments proved that the Al2O3 ceramic phase can be created in-situ in the steel matrix.

Effect of TiB2 Content on Microstructure and Hardness of In Situ TiB2 Reinforced High Zinc Content Al-Zn-Mg-Cu-Zr Composite Materials

2017 ◽  
Vol 894 ◽  
pp. 34-37 ◽  
Author(s):  
He Li ◽  
Li Hua Chai ◽  
Zi Yong Chen ◽  
Hai Jing Wang ◽  
Tou Nan Jin
Keyword(s):  
Grain Size ◽  
Zinc Content ◽  
Hardness Test ◽  
Matrix Alloy ◽  
Pure Zinc ◽  
Average Grain Size ◽  
Master Alloys ◽  
High Zinc ◽  
The Matrix

TiB2p/Al-10Zn-1.7Mg-1.0Cu-0.12Zr composite was prepared by synthesis of in-situ Al-TiB2 master alloy, high purity aluminum, pure zinc, pure magnesium, Al-50 wt% Cu and Al-4 wt% Zr master alloys. The mass fraction of TiB2 particles was varied from 0% to 9.14%. SEM and TEM were applied to evaluate the microstructure and phase component. HB hardness test were carried out on hardness value of the matrix alloy and the composite. The results showed that TiB2 particles uniformly distributed in the composite and well combined with the matrix alloy. The average grain size of the composites decreased from 110.35μm to 52.07μm when the TiB2 particles is 4.47%, and the grain size changed slightly when TiB2 content increased further. The hardness value of the composites which raised from 189HB to 206HB is superior to that of the matrix alloy. As the content of TiB2 particles increased, HB hardness value also increased.

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