scholarly journals PHASE COMPOSITION OF THE INTERACTION ZONE FORMED IN THE TI-CU SYSTEM COMPOSITE IN THE PRESENCE OF A LIQUID PHASE

2020 ◽  
pp. 18-24
Author(s):  
V. G. Shmorgun ◽  
O. V. Slautin ◽  
A. G. Serov ◽  
V. P. Kulevich
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Phase Composition ◽  
Liquid Phase ◽  
Nickel Alloy ◽  
Intermetallic Compounds ◽  
Melting Temperature ◽  
Weight Fraction ◽  
Interaction Zone ◽  
Copper Nickel Alloy

It was shown that heat treatment of Ti-Cu system composites at temperatures above the melting temperature of copper (copper-nickel alloy) leads to the formation of an interaction zone, the structure and phase composition of which is determined by the temperature and time of existence of the liquid melt solid solution in contact with the interlayer. Other things being equal, an increase in the exposure time leads to an increase in the volume of reacted titanium and the weight fraction of titanium-rich intermetallic compounds in its structure.

scholarly journals FORMATION OF THE STRUCTURE AND COMPOSITION OF THE DIFFUSION INTERACTION ZONE DURING THE HEAT TREATMENT OF THE EXPLOSION-WELDED AD1 + Cr20Ni80 COMPOSITE IN THE PRESENCE OF A LIQUID PHASE

2021 ◽  
pp. 7-11
Author(s):  
V. G. Shmorgun ◽  
A. I. Bogdanov ◽  
D. V. Shcherbin ◽  
V. P. Kulevich
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Melting Point ◽  
Liquid Phase ◽  
Intermetallic Compounds ◽  
Diffusion Coating ◽  
Phase Interaction ◽  
Interaction Zone ◽  
Coating Structure ◽  
Study Results

The paper presents the study results of the structure, chemical and phase composition of the diffusion coating formed during the heat treatment of the explosion-welded Cr20Ni80 + AD1 bimetal according to the regime providing liquid-phase interaction (above the melting point of aluminum) on the surface of the Cr20Ni80 alloy. It is shown that its structure consists of inclusions of NiAl, CrAl, NiAl intermetallic compounds, as well as a metastable ternary compound - τ-phase with composition of AlCrNi of different dispersion and morphology. There are no crystallization defects in the coating structure.

scholarly journals FORMATION OF THE INTERACTION ZONE AT THE INTERLAYER BOUNDARY OF THE EXPLOSION-BOILED COMPOSITE VT1-0 + MH45 IN CONTACT MELTING

2020 ◽  
pp. 7-13
Author(s):  
V. G. Shmorgun ◽  
A. G. Serov ◽  
O. V. Slautin ◽  
S. A. Kuznetsov ◽  
A. V. Malykh
Keyword(s):  
Solid Solution ◽  
Phase Composition ◽  
Liquid Phase ◽  
Liquid Metal ◽  
Melting Process ◽  
Contact Melting ◽  
Layered Composite ◽  
Interaction Zone ◽  
Continuous Layer ◽  
Solid Phases

It is shown that the replacement of the MH19 alloy with the MH45 alloy in the explosion-welded layered titanium-copper-nickel composite leads to a decrease in the temperature at which the liquid (metal melted by contact melting) is in equilibrium with the solid phases from 930 ° C (L↔TiCuNi + NiTi + CuTi) up to 860 ° C (L↔ TiCu+NiTi+TiNi); to a change in the mechanism of contact melting from diffusion to diffusion; to increase the proportion of titanium in the interaction zone from ~ 50 at.% to ~ 66 at.%. The development of the contact melting process at the interlayer boundary of the VT1-0 + MH45 layered composite after the solid solution is transformed into a liquid phase film leads to the formation of an interaction zone with the phase composition TiCuNi, TiNi (Cu), TiCu (Ni), TiNi (Cu) TiCu (Ni) . On the side of the MH45 alloy, a continuous layer of the ternary intermetallic TiCuNi adjoins it, and on the titanium side, αTi + TiNi (Cu).

Micromorphology and Characterization of V2O3 Nanoparticles Produced by the Liquid Phase Reduction-Heat Treatment

2019 ◽  
Vol 944 ◽  
pp. 650-656
Author(s):  
Ming Rui Zhang ◽  
Yuan Qin ◽  
Dao Zhang ◽  
Guang Yuan Wang ◽  
Sen Yang
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Liquid Phase ◽  
Thermal Treatment ◽  
Oxalic Acid ◽  
Structure And Morphology ◽  
Phase Reduction ◽  
Novel Method ◽  
Composition Structure

The liquid phase reduction-heat treatment has been used to prepare V2O3nanoparticles in this paper. It is a novel method that the precursor was developed by Oxalic acid dehydrate (H2C2O4·2H2O) reduction of V2O5powder in anhydrous ethanol. V2O3nanoparticles were successfully obtained by thermal treatment of the precursor. The phase, composition, structure, and morphology of the as-obtained samples were verified by XRD, XPS, SEM and TEM measurements. Meanwhile, the possible formation mechanism of V2O3in the heat-treatment is briefly discussed by analyzing the DSC.

Effect of Heat Treatment on the Structure and Phase Composition of the Nanosized Powder Based on a ZrO2 Solid Solution

2020 ◽  
Vol 59 (1-2) ◽  
pp. 1-8
Author(s):  
O.V. Dudnik ◽  
I.O. Marek ◽  
O.K. Ruban ◽  
V.P. Redko ◽  
M.I. Danilenko ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Phase Composition ◽  
Nanosized Powder

scholarly journals Obtaining tube blanks from copper-nickel alloy МНЖ 5-1 when using a tool made of die steel adjustable austenitic transformation during operation

2021 ◽  
pp. 24-28
Author(s):  
O. Sydorchuk
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Nickel Alloy ◽  
Hot Deformation ◽  
Electroslag Remelting ◽  
Initial State ◽  
Copper Nickel ◽  
Austenitic Transformation ◽  
The Matrix ◽  
Copper Nickel Alloy

Purpose. Production of die tool from steel with regulation of austenitic transformation during operation to increase the level of service life during hot deformation of copper-nickel alloy. Research methods. Metallographic, high-temperature X-ray phase and dilatometric analyzes of research steel. Results. The mode of heat treatment (incomplete annealing) of steel 4Х3Н5М3Ф at a temperature of 750±20 °С, obtained by electroslag remelting, allowed to obtain a perlite-sorbitol structure at a hardness of33–34 HRC and allowed better machining by cutting the workpiece alloy. The proposed mode of final heat treatment (hardening 1030±10 °C and tempering 600±5 °C) of the investigated steel, makes it possible to heat the matrix during operation to a temperature of 600 °C. Scientific novelty. The thermal stability of the tool for hot deformation can be significantly increased when using steel with adjustable austenitic transformation during operation. Such steel in the initial state has a ferrite base, and when heated to operating temperatures occurs from α-Fe to γ-Fe conversion and, subsequently, the austenitic structure is preserved throughout the period of high-temperature operation of the stamping tool. It is confirmed that the stamping tool made of steel 4Kh3N5М3F when pressing a copper-nickel alloy works in the temperature range corresponding to the austenitization process. Practical value. Abbreviated technological operation, namely thermo-deformation processing (forging) of ingots obtained by electroslag remelting. Experimental-industrial tests of the die tool of steel 4Х3Н5М3Ф in the manufacture of tube blanks of Ø 67±0,1 mm from a copper-nickel alloy of the МНЖ 5-1 brand are carried out. As a result of research “Artemovsk plant for processing of non-ferrous metals and alloys” (Bakhmut, Donetsk region, Ukraine) at an operating temperature of 900–950 ° C, matrices made of steel 4Х3Н5М3Ф (without deformation-forging) showed stability in three times higher than the matrices from steel 3Х3М3Ф made at the enterprise.

scholarly journals INVESTIGATION OF THE EFFECT OF HEATING ON THE STRUCTURE AND PHASE COMPOSITION OF AL-TI COMPOSITES

2020 ◽  
pp. 7-14
Author(s):  
V. G. Shmorgun ◽  
A. I. Bogdanov ◽  
V. P. Kulevich ◽  
A. S. Ivanov
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Titanium Surface ◽  
Treatment Temperature ◽  
Accelerated Cooling ◽  
Interaction Zone ◽  
Aluminum Layer ◽  
Diffusion Interaction ◽  
Phase And Chemical Composition ◽  
Spontaneous Separation

The results of studies of the diffusion interaction of titanium with aluminum at a temperature of 650 ° C are presented. The phase and chemical composition of the diffusion interaction zone and the nature of changes in its thickness from the exposure time are determined. It is shown that accelerated cooling of explosion-welded composites from the heat treatment temperature leads to spontaneous separation of the aluminum layer with the formation of a coating based on intermetallic TiAl on the titanium surface.

The Effect of the Microstructure on Oxidation of Sulfide-Metal Alloys of Copper and Nickel

2011 ◽  
Vol 312-315 ◽  
pp. 306-311 ◽  
Author(s):  
Evgeny N. Selivanov ◽  
R.I. Gulyaeva ◽  
L.Y. Udoeva ◽  
A.D. Verchinin
Keyword(s):  
Phase Transformation ◽  
Phase Composition ◽  
High Temperature ◽  
Nickel Alloy ◽  
Mass Spectrometric ◽  
Metal Alloys ◽  
Continuous Heating ◽  
X Ray ◽  
Oxidation Processes ◽  
Copper Nickel Alloy

The methods of thermal, thermogravimetric, mass spectrometric and high-temperature X-ray analysis have been used to determine the chemism of the processes involving the oxidation of a sulfide-metal copper-nickel alloy during continuous heating to 1190 K in an air flow. It has been found that the fineness of particles, the size of the sulfide phases in these particles, and the phase composition influence the phase transformation temperatures, as well as the kinetics and the sequence of the oxidation processes.

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