Spark plasma sintering for high-speed diffusion bonding of the ultrafine-grained near-α Ti–5Al–2V alloy with high strength and corrosion resistance for nuclear engineering

2019 ◽  
Vol 54 (24) ◽  
pp. 14926-14949 ◽  
Author(s):  
Vladimir Nikolaevich Chuvil’deev ◽  
Aleksey Vladimirovich Nokhrin ◽  
Vladimir Ilyich Kopylov ◽  
Maksim Sergeevich Boldin ◽  
Mikhail Mikhaylovich Vostokov ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Spark Plasma Sintering ◽  
Diffusion Bonding ◽  
High Speed ◽  
High Strength ◽  
Nuclear Engineering ◽  
Plasma Sintering ◽  
Ultrafine Grained ◽  
Spark Plasma

scholarly journals Spark Plasma Sintering of high-strength ultrafine-grained tungsten carbide

2017 ◽  
Vol 218 ◽  
pp. 012012 ◽  
Author(s):  
A V Nokhrin ◽  
V N Chuvil’deev ◽  
Yu V Blagoveshchenskiy ◽  
M S Boldin ◽  
N V Sakharov ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Spark Plasma Sintering ◽  
High Strength ◽  
Plasma Sintering ◽  
Ultrafine Grained ◽  
Spark Plasma

High-strength ultrafine-grained tungsten-carbide-based materials obtained by spark plasma sintering

2015 ◽  
Vol 41 (4) ◽  
pp. 397-400 ◽  
Author(s):  
V. N. Chuvil’deev ◽  
Yu. V. Blagoveshchenskii ◽  
M. S. Boldin ◽  
N. V. Sakharov ◽  
A. V. Nokhrin ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Spark Plasma Sintering ◽  
High Strength ◽  
Plasma Sintering ◽  
Ultrafine Grained ◽  
Spark Plasma

scholarly journals Exploring the Strain Hardening Mechanisms of Ultrafine Grained Nickel Processed by Spark Plasma Sintering

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 65
Author(s):  
Lucía García de la Cruz ◽  
Mayerling Martinez Celis ◽  
Clément Keller ◽  
Eric Hug
Keyword(s):  
Grain Size ◽  
Strain Hardening ◽  
Spark Plasma Sintering ◽  
High Strength ◽  
Electron Backscattered Diffraction ◽  
Plasma Sintering ◽  
Ultrafine Grained ◽  
Spark Plasma ◽  
Deformed State ◽  
Hardening Mechanisms

Ultrafine grained (UFG) materials in the bigger grain size range (0.5–1) µm display a good combination of strength and ductility, unlike smaller size UFG and nanostructured metals, which usually exhibit high strength but low ductility. Such difference can be attributed to a change in plasticity mechanisms that modifies their strain hardening capability. The purpose of this work is to investigate the work hardening mechanisms of UFG nickel considering samples with grain sizes ranging from 0.82 to 25 µm. Specimens processed combining ball milling and spark plasma sintering were subjected to monotonous tensile testing up to fracture. Then, microstructural observations of the deformed state of the samples were carried out by electron backscattered diffraction and transmission electron microscopy. A lower strain hardening capability is observed with decreasing grain size. Samples in the submicrometric range display the three characteristic stages of strain hardening with a short second stage and the third stage beginning soon after yielding. Microstructural observations display a low fraction of low angle grain boundaries and dislocation density for the sample with d = 0.82 µm, suggesting changes in plasticity mechanisms early in the UFG range.

Effect of Spark Plasma Sintering on the Microstructure Evolution and Properties of M3:2 High-Speed Steel

2014 ◽  
Vol 788 ◽  
pp. 329-333
Author(s):  
Rui Zhou ◽  
Xiao Gang Diao ◽  
Jun Chen ◽  
Xiao Nan Du ◽  
Guo Ding Yuan ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Spark Plasma Sintering ◽  
High Speed ◽  
Bending Strength ◽  
Sintering Temperature ◽  
High Speed Steel ◽  
Continuous Heating ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
The Impact

Effects of sintering temperatures on the microstructure and mechanical performance of SPS M3:2 high speed steel prepared by spark plasma sintering was studied. High speed steel sintering curve of continuous heating from ambient temperature to 1200°C was estimated to analyze the sintering processes and sintering temperature range. The sintering temperature within this range was divided into groups to investigate hardness, relative density and microstructure of M3:2 high-speed steel. Strip and quadrate carbides were observed inside the equiaxed grains. SPS sintering temperature at 900°C can lead to nearly full densification with grain size smaller than 20μm. The hardness and bending strength are higher than that of the conventionally powder metallurgy fabricated ones sintered at 1270°C. However, fracture toughness of the high speed steel is lower than that of the conventional powder metallurgy steels. This can be attributed to the shape and distribution of M6C carbides which reduce the impact toughness of high speed steels.

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