Fabrication and Properties of TiB2 Reinforced Cu Composites by Electromagnetic Stirring

2004 ◽  
Vol 449-452 ◽  
pp. 297-300 ◽  
Author(s):  
Taek Kyun Jung ◽  
Sung Chul Lim ◽  
Hyouk Chon Kwon ◽  
Mok Soon Kim
Keyword(s):  
Annealing Temperature ◽  
Volume Fraction ◽  
Melting Furnace ◽  
Electromagnetic Stirring ◽  
Vacuum Arc ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Copper Melt ◽  
Mean Size ◽  
The Mean

Cu-Ti and Cu-B alloys were separately cast in vacuum arc melting furnace for alloying. These alloys were added to the copper melt of 1500K in the induction furnace and performed electromagnetic stirring at 1000rpm. The cast ingot(dia : 70mm, length : 100mm) was hot extruded with the extrusion ratio of 13:1 after heating at 1073K for 1 hour. The TiB 2 precipitates were observed in the extruded materials and the mean size of TiB 2 precipitates was found to be about 1.5µm. The volume fraction of TiB 2 varies due to the density difference between the TiB2 and the copper melt. With the increasing of TiB2 contents from 3 to 8 vol.%, the hardness and the tensile strength increased from 951 to 140Hv and from 248 to 278MPa, respectively, and the electrical conductivity decreased from 82 to 70%IACS. However, the mean size of TiB 2 particle was not increased despite increasing an annealing temperature.

Effect of Mo and Ni Content on the Mechanical Properties of Low Carbon and Alloy Steel Casting Sample for Coal-Mining Machinery

2012 ◽  
Vol 476-478 ◽  
pp. 329-333
Author(s):  
Zhi Ying Ma ◽  
Yi Tao Yang
Keyword(s):  
Mechanical Properties ◽  
Melting Furnace ◽  
Vacuum Arc ◽  
Low Carbon ◽  
Alloy Casting ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Ni Content ◽  
Mining Machinery ◽  
Casting Steel

The effect of Mo and Ni content on the mechanical properties of low carbon and alloy casting steel by using Vacuum Arc Melting Furnace had been studied in this paper. The results indicated that increasing Mo or Ni content would enhance the hardness and strength of the steel separately, with some of elongation loss. It showed that ferrite refined with the increasing alloy content. The combinations of Mo and Ni content were of importance for comprehensive mechanical properties and wear resistance. The appropriate content in low carbon casting steel with 0.02%Nb was 0.5%-0.6%Mo and 0.2%-0.4%Ni.

Ti5Si3/β-Ti nano-core–shell structure toughened glassy Ti alloy matrix biocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (11) ◽  
pp. 8355-8361 ◽  
Author(s):  
Chunxiang Cui ◽  
Ling Bai ◽  
Shuangjin Liu ◽  
Yumin Qi ◽  
Lichen Zhao
Keyword(s):  
Shell Structure ◽  
Melting Furnace ◽  
Vacuum Arc ◽  
Core Shell ◽  
Ti Alloy ◽  
Alloy Matrix ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Core Shell Structure

In the experiment, Ti75Zr11Si9Fe5 and Ti66Zr11Si15Fe5Mo3 ingots were prepared by vacuum arc-melting furnace.

scholarly journals Effect of Re on the Microstructure and Mechanical Properties of NbTiZr and TaTiZr Equiatomic Alloys

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1819
Author(s):  
Oleg N. Senkov ◽  
Stéphane Gorsse ◽  
Robert Wheeler ◽  
Eric J. Payton ◽  
Daniel B. Miracle
Keyword(s):  
Crystal Structure ◽  
Mechanical Properties ◽  
Yield Stress ◽  
Volume Fraction ◽  
True Strain ◽  
Matrix Phase ◽  
Vacuum Arc ◽  
Strengthening Effect ◽  
Arc Melting ◽  
Vacuum Arc Melting

The microstructure, phase composition, and mechanical properties of NbTiZr, TaTiZr, Re0.3NbTiZr, and Re0.3TaTiZr are reported. The alloys were produced by vacuum arc melting and hot isostatically pressed (HIP’d) at 1400 °C for 3 h under 276 MPa hydrostatic pressure of high-purity argon prior to testing. NbTiZr had a single-phase BCC crystal structure, while TaTiZr had a Ti- and Zr-rich BCC matrix phase and Ta-rich nanometer-sized BCC precipitates, at volume fractions of 0.49 and 0.51, respectively. Re0.3NbTiZr consisted of a BCC matrix phase and Re-rich precipitates with a FCC crystal structure and the volume fraction of 0.14. The microstructure of Re0.3TaTiZr consisted of a Zr-rich BCC matrix phase and coarse, Re and Ta rich, BCC particles, which volume fraction was 0.47. NbTiZr and TaTiZr had a room temperature (RT) yield stress of 920 MPa and 1670 MPa, respectively. While, 10 at.% Re additions increased the RT yield stress to 1220 MPa in Re0.3NbTiZr and 1715 MPa in Re0.3TaTiZr. Re also considerably improved the RT ductility of TaTiZr, from about 2.5% to 10% of true strain. The positive strengthening effect from the Re additions was retained at high (800–1200 °C) temperatures.

Highly Ordered Nanotube Formation on Beta Typed Ti–xTa Alloy Surface

2020 ◽  
Vol 20 (9) ◽  
pp. 5791-5795
Author(s):  
Seung-Pyo Kim ◽  
Han-Cheol Choe
Keyword(s):  
Surface Characterization ◽  
Melting Furnace ◽  
Power Source ◽  
Alloy Surface ◽  
Vacuum Arc ◽  
X Ray ◽  
Dc Power ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Martensite Structure

In this study, the highly ordered nanotube formation on beta typed Ti–xTa alloy surface was investigated. The Ti–xTa binary alloys were manufactured using a vacuum arc-melting furnace with varying Ta contents (10, 30, and 50 wt%), and then homogenized by heat treatment at 1050 °C for 1 h. The nanotube formation of Ti–xTa (x = 10–50 wt%) alloys were performed using a DC power source of 30 V in 1.0 M H3PO4 + 0.8 wt% NaF electrolyte solution for 2 hrs. The surface characterization was performed using field-emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. The microstructure of Ti–xTa alloy showed martensite structure α′, α″-phase, and a ′-phase structure. As the Ta content increased, the needle-like structures of α′ and α′-phase gradually disappeared and only the equiaxed structure of β-phase appeared. Nanotube morphology of Ti–xTa alloy changed according to Ta content. As the Ta content increased, the size of the nanotubes decreased and the number of the smaller nanotubes increased. In the cross-sectioned nanotube layer, the gap size between the nanotubes decreased as the Ta content increased.

Electrochemical Properties of TiN and ZrN Coated Ti-Hf Alloy

2007 ◽  
Vol 26-28 ◽  
pp. 813-816
Author(s):  
Yong Hoon Jeong ◽  
Han Cheol Choe ◽  
Su Jung Park ◽  
Yeong Mu Ko
Keyword(s):  
Electrochemical Properties ◽  
Melting Furnace ◽  
Alloy System ◽  
Rf Magnetron Sputtering ◽  
Vacuum Arc ◽  
Nacl Solution ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Layer Analysis ◽  
Coated Surface

The Ti-Hf alloy system forms α-β isomorphous system and does not form any intermetallic compounds, which is also beneficial for good mechanical properties. And in order to avoid the release of materials, surface modifications are generally carried out to form a TiN and ZrN layer on the surface. Electrochemical properties of TiN and ZrN coated Ti-Hf alloy by RFsputtering has been researched using various electrochemical methods. Ti-10wt%, 20wt%, 30wt%, and 40wt% Hf alloys manufactured by non consumable vacuum arc melting furnace. All the specimens were heat treatment at 1000°C for 24hr in Ar atmosphere followed by furnace cooling, respectively. The specimens were coated with TiN and ZrN respectively, by RF-magnetron sputtering method. The microstructures were conducted by using OM, EDX and SEM. The corrosion tests were carried out using potentiodynamic(PARSTAT 2273, EG&G, USA) and potentiostatic test in 0.9% NaCl solution at 36.5 ±1 °C. Microstructure clearly observed that lamellar structure translated to needle-like structure with increased Hf contents. From the analysis of TiN and ZrN coated layer analysis, TiN and ZrN coated surface showed columlar structure with 600nm and 100nm thickness, respectively. The corrosion resistance of TiN and ZrN coated Ti alloys were higher than those of the non-coated Ti-alloy in 0.9%NaCl solution, indicating better protective effect.

scholarly journals Microstructure and Oxidation Resistance of Cr–Al–Si Alloys for High-Temperature Applications

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 329
Author(s):  
Jeong-Min Kim ◽  
Chae-Young Kim
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
Single Phase ◽  
Melting Furnace ◽  
Vacuum Arc ◽  
Coating Materials ◽  
Temperature Oxidation ◽  
Al Content ◽  
Arc Melting ◽  
Vacuum Arc Melting

Cr–Al alloys are attracting much attention as heat- and corrosion-resistant coating materials due to their excellent high-temperature properties. In order to investigate the effect of aluminum content on the microstructure and oxidation resistance of Cr–Al–Si alloys, cast specimens were prepared by using a vacuum-arc melting furnace, and high-temperature oxidation tests were conducted with the specimens, for 1 h, at 1100 °C, in air. In the case of cast microstructure of Cr–Al–Si alloys, it consists mainly of Cr single phase, up to 5 at.% Al, and AlCr phases were additionally formed in alloys containing 10% Al or more. In the specimen with 20% Al added, CrSi phase was also found in addition to the AlCr phase. The weight change of the specimens heated for 1 h, at 1100 °C, indicated that all had excellent oxidation resistance. However, when the Al content was less than 10%, the weight gain tended to be a little lower than that of 10% or more.

Effect of Si Content on Microstructure and Wear Resistance of Cold Roll Steel with 5%Cr

2011 ◽  
Vol 189-193 ◽  
pp. 4281-4285 ◽  
Author(s):  
Ying Mai Wu ◽  
Yi Tao Yang ◽  
Guang Jie Shao
Keyword(s):  
Wear Resistance ◽  
Melting Furnace ◽  
Xrd Analysis ◽  
Vacuum Arc ◽  
Primary Carbide ◽  
Roll Steel ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Cold Roll ◽  
Si Content

The effect of Si content on structure and wear resistance of cold roll steel with 5%Cr by using vacuum arc melting furnace had been studied in this paper. Results showed that with increasing Si content martensite got coarsening and the number and content of primary carbide increased; The type of primary carbide was M7C3 and Si mainly dissolved into martensite by XRD analysis; The wear resistance was effectively improved while Si content increased. The appropriate Si content in cold roll steel with 5%Cr was 1.5%~2％.

scholarly journals Trial Manufacture of a Vacuum Arc-Melting Furnace for Laboratories

1961 ◽  
Vol 47 (9) ◽  
pp. 1148-1155
Author(s):  
Shuzo TAKEDA ◽  
Naoki NAGAI ◽  
Natsuo YUKAWA ◽  
Fumio HORI
Keyword(s):  
Melting Furnace ◽  
Vacuum Arc ◽  
Arc Melting ◽  
Vacuum Arc Melting

scholarly journals Irradiation Behaviors in BCC Multi-Component Alloys with Different Lattice Distortions

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 706
Author(s):  
Yue Su ◽  
Songqin Xia ◽  
Jia Huang ◽  
Qingyuan Liu ◽  
Haocheng Liu ◽  
...  
Keyword(s):  
Single Phase ◽  
Vacuum Arc ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Chemical Complexity ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Lattice Distortions ◽  
Face Centered ◽  
Displacement Per Atom

Recently, the irradiation behaviors of multi-component alloys have stimulated an increasing interest due to their ability to suppress the growth of irradiation defects, though the mostly studied alloys are limited to face centered cubic (fcc) structured multi-component alloys. In this work, two single-phase body centered cubic (bcc) structured multi-component alloys (CrFeV, AlCrFeV) with different lattice distortions were prepared by vacuum arc melting, and the reference of α-Fe was also prepared. After 6 MeV Au ions irradiation to over 100 dpa (displacement per atom) at 500 °C, the bcc structured CrFeV and AlCrFeV exhibited significantly improved irradiation swelling resistance compared to α-Fe, especially AlCrFeV. The AlCrFeV alloy possesses superior swelling resistance, showing no voids compared to α-Fe and CrFeV alloy, and scarce irradiation softening appears in AlCrFeV. Owing to their chemical complexity, it is believed that the multi-component alloys under irradiation have more defect recombination and less damage accumulation. Accordingly, we discuss the origin of irradiation resistance and the Al effect in the studied bcc structured multi-component alloys.

scholarly journals Study on Microstructure and In Situ Tensile Deformation Behavior of Fe-25Mn-xAl-8Ni-C Alloy Prepared by Vacuum Arc Melting

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 814
Author(s):  
Yaping Bai ◽  
Meng Li ◽  
Chao Cheng ◽  
Jianping Li ◽  
Yongchun Guo ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Austenite Phase ◽  
Vacuum Arc ◽  
Al Content ◽  
Arc Melting ◽  
Vacuum Arc Melting ◽  
Tensile Deformation Behavior

In this study, Fe-25Mn-xAl-8Ni-C alloys (x = 10 wt.%, 11 wt.%, 12 wt.%, 13 wt.%) were prepared by a vacuum arc melting method, and the microstructure of this series of alloys and the in situ tensile deformation behavior were studied. The results showed that Fe-25Mn-xAl-8Ni-C alloys mainly contained austenite phase with a small amount of NiAl compound. With the content of Al increasing, the amount of austenite decreased while the amount of NiAl compound increased. When the Al content increased to 12 wt.%, the interface between austenite and NiAl compound and austenitic internal started to precipitate k-carbide phase. In situ tensile results also showed that as the content of Al increased, the alloy elongation decreased gradually, and the tensile strength first increased and then decreased. When the Al content was up to 11 wt.%, the elongation and tensile strength were 2.6% and 702.5 MPa, respectively; the results of in situ tensile dynamic observations show that during the process of stretching, austenite deformed first, and crack initiation mainly occurred at the interface between austenite and NiAl compound, and propagated along the interface, resulting in fracture of the alloy.

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