Diffusion welding of powder metallurgy high speed steel by spark plasma sintering

2020 ◽  
Vol 275 ◽  
pp. 116383 ◽  
Author(s):  
Weijun Shen ◽  
Linping Yu ◽  
Huixin Liu ◽  
Yuehui He ◽  
Zhe Zhou ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Spark Plasma Sintering ◽  
High Speed ◽  
High Speed Steel ◽  
Diffusion Welding ◽  
Plasma Sintering ◽  
Spark Plasma

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.

scholarly journals High Speed Steel with Iron Addition Materials Sintered by Spark Plasma Sintering

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1549
Author(s):  
Marcin Madej ◽  
Beata Leszczyńska-Madej ◽  
Dariusz Garbiec
Keyword(s):  
Spark Plasma Sintering ◽  
High Speed ◽  
Sintering Temperature ◽  
Microstructural Analysis ◽  
High Speed Steel ◽  
High Hardness ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Powder Addition ◽  
Sintered Materials

Attempts were made to describe the effect of the sintering temperature and pure iron powder addition on the properties of high speed steel based materials produced by the spark plasma sintering technique. After sintering, their density, hardness, flexural strength, and tribological properties were determined. The sintered materials were also subjected to microstructural analysis in order to determine the phenomena occurring at the particle contact boundaries during sintering. Based on the analysis of the obtained results, it was found that the mechanical properties and microstructure were mainly influenced by the sintering temperature. Using the temperature of 1000 °C allowed materials with a density close to the theoretical density to be obtained, characterized by a high hardness of about 360 HB and a low wear rate of about 1E-07 g/s.

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

Biomedical Ti-24Nb-4Zr-7.9Sn Alloy Fabricated by Conventional Powder Metallurgy and Spark Plasma Sintering

2012 ◽  
Vol 520 ◽  
pp. 208-213 ◽  
Author(s):  
Shi Bo Guo ◽  
Chun Bo Cai ◽  
Yong Qiang Zhang ◽  
Yong Xiao ◽  
Xuan Hui Qu
Keyword(s):  
Tensile Strength ◽  
Powder Metallurgy ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Raw Materials ◽  
Fracture Morphology ◽  
Sintering Process ◽  
Comprehensive Properties ◽  
Plasma Sintering ◽  
Spark Plasma

Ti-24Nb-4Zr-7.9Sn alloy was prepared by Powder Metallurgy (PM) and Spark Plasma Sintering (SPS) using titanium hydride powder, niobium powder, zirconium powder and tin powder as raw materials. The effect of sintering process on microstructure and mechanical properties was investigated by mechanical measurement and SEM. The results showed that the best sintering process by PM was at 12500C for 2 h. The relative density, tensile strength and elongation of the alloy reached 97.2%, 705MPa and 6.2%, respectively. The microstructure was a typical Widmannstatten microstructure, which possessed β-matrix and α-precipitation. The best process by SPS was at 12500C. The relative density, tensile strength and elongation of the alloy sintered by SPS reached 99.4%, 788.5MPa and 6.4%, respectively. The grain size was about 100µm and the microstructure was uniform. The fracture morphology of the alloy was ductile rupture. Compared to PM, Ti-24Nb-4Zr-7.9Sn alloy fabricated by SPS exhibited better comprehensive properties and more uniform microstructure.

scholarly journals Spark plasma sintering for high-rate diffusion welding of a UFG titanium alloy PT3V

2019 ◽  
Vol 558 ◽  
pp. 012029
Author(s):  
A V Nokhrin ◽  
M S Boldin ◽  
E A Lantsev ◽  
M M Vostokov ◽  
M Yu Gryaznov ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Spark Plasma Sintering ◽  
High Rate ◽  
Diffusion Welding ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Advanced Powder Metallurgy Technologies

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1742 ◽  
Author(s):  
Pavel Novák
Keyword(s):  
World War Ii ◽  
Powder Metallurgy ◽  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
Chemical Reduction ◽  
Hot Isostatic Pressing ◽  
Synthesis Methods ◽  
Special Focus ◽  
Plasma Sintering ◽  
Spark Plasma

Powder metallurgy is a group of advanced processes for the synthesis, processing, and shaping of various kinds of materials. Initially inspired by ceramics processing, the methodology comprising of the production of a powder and its transformation to a compact solid product has attracted great attention since the end of World War II. At present, there are many technologies for powder production (e.g., gas atomization of the melt, chemical reduction, milling, and mechanical alloying) and its consolidation (e.g., pressing and sintering, hot isostatic pressing, and spark plasma sintering). The most promising ones can achieve an ultra-fine or nano-grained structure of the powder, and preserve it during consolidation. Among these methods, mechanical alloying and spark plasma sintering play a key role. This Special Issue gives special focus to the advancement of mechanical alloying, spark plasma sintering and self-propagating high-temperature synthesis methods, as well as to the role of these processes in the development of new materials.

Ultrafine-grained Ti66Nb13Cu8Ni6.8Al6.2 composites fabricated by spark plasma sintering and crystallization of amorphous phase

2009 ◽  
Vol 24 (6) ◽  
pp. 2118-2122 ◽  
Author(s):  
Y.Y. Li ◽  
C. Yang ◽  
W.P. Chen ◽  
X.Q. Li ◽  
S.G. Qu
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Spark Plasma Sintering ◽  
Amorphous Phase ◽  
Fracture Strength ◽  
High Fracture ◽  
Plasma Sintering ◽  
Ultrafine Grained ◽  
Spark Plasma

We report on the formation of ultrafine-grained Ti66Nb13Cu8Ni6.8Al6.2 composites with in situ precipitated micrometer-sized β-Ti(Nb) phase by spark plasma sintering with crystallization. Microstructure analysis indicated that all alloys consisted of soft (Cu, Ni)Ti2 regions surrounded by hard β-Ti(Nb) regions but displayed different microstructures. The alloys exhibited high fracture strength of more than 2200 MPa and remarkable plasticity of ∼25%. The results provided a promising method for fabricating large-sized bulk composites with excellent mechanical properties by powder metallurgy.

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