Optimum atomic concentration in structurally disordered nanoporous Pt–Co alloys with the strongest mechanical properties

This study was focused on the effect of VC addition on the microstructure and mechanical properties of the prepared ultrafine grained cemented carbides. VC was added to the rawoxide materials which were synthesized to the WC-Co composite powder by the in-situ reduction and carbonization process. The ultrafine grained WC-Co alloys were fabricated by the spark plasma sintering technique using the prepared WC-Co composite powder. The phase constitution, microstructure characteristics and mechanical properties of the sintered ultrafine grained cemented carbides were analyzed quantitatively. The study proposed that VC plays a significant role in decreaseing the grain size of the prepared WC-Co alloy. The ultrafine grained WC-Co alloy with high comprehensive properties can be obtained as an appropriate addition of VC in the developed process.

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Precipitation behavior and mechanical properties of Ti-Ni-Nb-Co alloys

Intermetallics ◽

10.1016/j.intermet.2018.01.014 ◽

2018 ◽

Vol 95 ◽

pp. 40-47 ◽

Cited By ~ 5

Author(s):

Bo Cui ◽

Jian Yao ◽

Ye Wu ◽

Xin Zhang ◽

Fuli Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Precipitation Behavior ◽

Co Alloys

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INFLUENCE OF PRESSURE AND ATOMIC CONCENTRATION ON STRUCTURE AND MECHANICAL PROPERTIES OF CuNi ALLOY BY MOLECULAR DYNAMICS SIMULATION

Journal of Science Natural Science ◽

10.18173/2354-1059.2020-0029 ◽

2020 ◽

Vol 65 (6) ◽

pp. 54-60

Author(s):

Thao Nguyen Thi ◽

Hang Trinh Thi Thu

Keyword(s):

Mechanical Properties ◽

Dynamics Simulation ◽

Embedded Atom Method ◽

Face Centered Cubic ◽

Atomic Concentration ◽

Common Neighbor ◽

Hexagonal Close Packed ◽

Embedded Atom ◽

The Common ◽

Face Centered

The structure and mechanical properties of Cu80Ni20 and Cu50Ni50 alloys with the size of 4000 atoms have been investigated using molecular dynamic (MD) simulation. The interactions between atoms of the system were calculated by the Sutton-Chen type of embedded atom method. Using a cooling rate of 0.01 K\ps, we find that both Ni and Cu atoms are crystallized into face centered cubic (fcc) and the hexagonal close packed (hcp) phases when the sample was cooled down to 300 K. The atomic concentration of CuNi alloy samples have a different effect on this crystallization. The transformation to the crystalline phase is analyzed through the Common Neighbor Analysis (CNA) methods. Furthermore, we focus on the dependence of the mechanical properties of CuNi alloy on pressure and atomic concentration

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Local Mechanical Properties of Cu-Co Alloys with Coherent Co Precipitates

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.662.15 ◽

2015 ◽

Vol 662 ◽

pp. 15-18

Author(s):

Jiří Buršík ◽

Vilma Buršíková ◽

Milan Svoboda

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Solid Solution ◽

Thermal Treatment ◽

Analytical Electron Microscopy ◽

Water Quenching ◽

Large Area ◽

Analytical Electron ◽

Indentation Tests ◽

Co Alloys

In this work the influence of the thermal treatment on the local mechanical properties of model diluted Cu-Co alloys with Co content of 4 at.% is investigated. The samples underwent annealing at 1273 K followed by water quenching. The further thermal treatment at 1073 K of the oversaturated solid solution generated a fine distribution of Co-rich precipitates. Parameters of microstructure were evaluated by means of analytical electron microscopy. The nanoscale mechanical properties of precipitates, areas adjacent to the precipitates and precipitate-free zones were studied using large area grid indentation tests. Moreover, the modulus mapping capability was applied to obtain quantitative maps of the storage and loss stiffness and modulus.

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Processing and Mechanical Properties of PM Processed Fe-Cu-Co Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.591-593.247 ◽

2008 ◽

Vol 591-593 ◽

pp. 247-251 ◽

Cited By ~ 7

Author(s):

A.P. Barbosa ◽

L.J. Oliveira ◽

Guerold Sergueevitch Bobrovinitchii ◽

R.S. Guimarães ◽

S. Crespo ◽

...

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Diamond Tools ◽

Cu Alloys ◽

Co Alloys ◽

Wear Tests ◽

The Ideal

In this work, a study to process and characterize Fe-Cu alloys with reduced Co content is shown. The Fe-Cu-Co alloys were processed by elemental blending of powders of the system Fe- 15%wtCu with various amounts of Co, pressing at 350MPa, and sintering at 1150°C/25min./10-2 mbar. The sintered microstructure was observed. It was conducted hardness and wear tests, aiming to define the ideal Cu addition for future use in impregnated diamond tools. It was observed that higher Co contents results in improved hardness and wear resistance in the studied Fe-Cu alloys.

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