scholarly journals Получение естественного металломатричного композита Al-Nb деформацией сдвигом под давлением и его эмиссионная эффективность в тлеющем разряде

2020 ◽  
Vol 46 (23) ◽  
pp. 45
Author(s):  
Р.Х. Хисамов ◽  
Г.Ф. Корзникова ◽  
Г.Р. Халикова ◽  
С.Н. Сергеев ◽  
К.С. Назаров ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Discharge Current ◽  
Metal Matrix ◽  
Intermetallic Phase ◽  
Cold Cathodes ◽  
Emission Efficiency ◽  
The Difference

A natural, in-situ, metal-matrix composite Al-Nb with an intermetallic phase Al3Nb with a fraction of 25% at. was obtained by deformation shear under pressure and subsequent annealing. The microstructure of the composite was studied. The emission efficiency in the glow discharge of Al-Nb composite, as well as aluminum and niobium as cold cathodes, was determined. The analysis of the difference between the glow discharge current at fixed voltages for cathodes from the studied materials is carried out.

Fabrication of an in situ Al−Nb Metal Matrix Composite by Constrained Shear Strain and Its Emission Efficiency in a Glow Discharge

2020 ◽  
Vol 46 (12) ◽  
pp. 1200-1202
Author(s):  
R. Kh. Khisamov ◽  
G. F. Korznikova ◽  
G. R. Khalikova ◽  
S. N. Sergeev ◽  
K. S. Nazarov ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Shear Strain ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Emission Efficiency

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.

Investigation on Mechanical Behavior of Hot Rolled Al7075-TiB2 In-situ Metal Matrix Composite

2018 ◽  
Vol 5 (11) ◽  
pp. 25605-25614 ◽  
Author(s):  
A.K. Gajakosh ◽  
R. Keshavamurthy ◽  
G. Ugrasen ◽  
H. Adarsh
Keyword(s):  
Mechanical Behavior ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Hot Rolled

scholarly journals Analysis, predictive modelling and multi-response optimization in electrical discharge machining of Al-22%SiC metal matrix composite for minimization of surface roughness and hole overcut

2020 ◽  
Vol 7 ◽  
pp. 20 ◽  
Author(s):  
Subhashree Naik ◽  
Sudhansu Ranjan Das ◽  
Debabrata Dhupal
Keyword(s):  
Surface Roughness ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Discharge Current ◽  
Metal Matrix ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Machining Parameters ◽  
Response Optimization ◽  
Pulse On Time

Due to the widespread engineering applications of metal matrix composites especially in automotive, aerospace, military, and electricity industries; the achievement of desired shape and contour of the machined end product with intricate geometry and dimensions that are very challenging task. This experimental investigation deals with electrical discharge machining of newly engineered metal matrix composite of aluminum reinforced with 22 wt.% of silicon carbide particles (Al-22%SiC MMC) using a brass electrode to analyze the machined part quality concerning surface roughness and overcut. Forty-six sets of experimental trials are conducted by considering five machining parameters (discharge current, gap voltage, pulse-on-time, pulse-off-time and flushing pressure) based on Box-Behnken's design of experiments (BBDOEs). This article demonstrates the methodology for predictive modeling and multi-response optimization of machining accuracy and surface quality to enhance the hole quality in Al-SiC based MMC, employing response surface methodology (RSM) and desirability function approach (DFA). Finally, a novel approach has been proposed for economic analysis which estimated the total machining cost per part of rupees 211.08 during EDM of Al-SiC MMC under optimum machining conditions. Thereafter, under the influence of discharge current several observations are performed on machined surface morphology and hole characteristics by scanning electron microscope to establish the process. The result shows that discharge current has the significant contribution (38.16% for Ra, 37.12% in case of OC) in degradation of surface finish as well as the dimensional deviation of hole diameter, especially overcut. The machining data generated for the Al-SiC MMC will be useful for the industry.

Tribological properties of Ti-aluminide reinforced Al-based in situ metal matrix composite

2005 ◽  
Vol 13 (7) ◽  
pp. 733-740 ◽  
Author(s):  
Debdas Roy ◽  
Bikramjit Basu ◽  
Amitava Basu Mallick
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Tribological Properties ◽  
Metal Matrix
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