The study of the chemical and phase composition of the diffusion interaction zone in layered composite Cr20Ni80-AD1

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).

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

IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY ◽

10.35211/1990-5297-2020-10-245-7-14 ◽

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.

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Structure and Phase Composition of the Al-Ti System Composites after Heat Treatment

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.410.519 ◽

2021 ◽

Vol 410 ◽

pp. 519-524

Author(s):

Victor Georgievich Shmorgun ◽

Artem I. Bogdanov ◽

Vitaliy P. Kulevich

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 studies results of the titanium with aluminum diffusion interaction at a temperature of 650 oC are presented. The phase and chemical composition of the diffusion interaction zone, the nature of the change 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 the TiAl3 intermetallic compound on the titanium surface.

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

IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY ◽

10.35211/1990-5297-2020-6-241-18-24 ◽

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.

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Preparation and electrochemical properties of lead-steel layered composite electrode materials for adiponitrile production

10.21203/rs.3.rs-225621/v1 ◽

2021 ◽

Author(s):

Yang Xu ◽

Zhaohui Han ◽

Peixian Zhu ◽

Shenggang Zhou

Keyword(s):

Phase Composition ◽

Electrochemical Properties ◽

Composite Electrode ◽

Electrode Materials ◽

Layered Composite ◽

Reduction Ratio ◽

Rolling Reduction ◽

Composite Electrodes ◽

Roll Bonding ◽

Bonding Technology

Abstract In this paper, Pb-63%Sn alloy was selected as an intermediate layer to plate on Q235 steel by the hot dipping method, and then the hot-dipped steel and the lead plate were welded by roll-bonding technology to prepare the lead-steel layered composite electrode materials. Scanning electron microscopy (SEM), Energy dispersion spectrum (EDS) and X-ray diffraction (XRD) were used to characterize the interface morphology and phase composition of samples, and the interface formation mechanism was also discussed. The electrochemical properties of the lead-steel layered composite electrode under different rolling reduction ratio were studied by linear sweep voltammetry (LSV), Tafel polarization curves (Tafel) and weight-loss method. Subsequently, the prepared lead-steel layered composite electrodes were applied to the industrial production experiment for adiponitrile. The results indicated that lead-steel layered composite electrodes with excellent electrochemical properties were successfully prepared by hot dipping and roll-bonding technology. Analysis of microstructure and phase composition showed that the metallurgical bond of hot-dipped steel and lead plate could be achieved by the process of rolling, and the fracture feature was ductile fracture. And the conductivity, electrocatalytic activity and corrosion resistant of lead-steel layered composite electrode material were improved with the increase of rolling reduction ratio. The industrial production results showed that, compared with the traditional Pb-0.6%Ag electrode, the prepared lead-steel layered composite electrode at the rolling reduction ratio of 40% exhibited the best industrial performance, the current efficiency was increased by 4.94%, the average cell voltage was reduced by 19.4%, and the adiponectin yield was increased by 4.86%.

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Investigation of the Process of Mechanical Alloying of Iron by Austenite Forming Elements

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.698.519 ◽

2014 ◽

Vol 698 ◽

pp. 519-524

Author(s):

Anatoly A. Popovich ◽

Nikolay G. Razumov

Keyword(s):

Experimental Data ◽

Phase Composition ◽

Mechanical Alloying ◽

Phase Formation ◽

Treatment Duration ◽

Layered Composite ◽

Alloying Elements

In this study the effect of the treatment duration on the processes of phase formation and dissolution of alloying elements in the process of mechanical alloying (MA) of iron by austenite forming elements in the nitrogen-containing atmosphere was investigated. Investigating the influence of MA parameters on the phase composition of the alloy showed that the first alloying elements dissolved in the lattice of iron are nickel, chrome and manganese. According to experimental data, the dissolution proceeds through the formation of a layered composite.

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Kinetics of Diffusion Interaction in Cr15Ni60-AD1 Layered Composite

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.299.760 ◽

2020 ◽

Vol 299 ◽

pp. 760-765

Author(s):

Victor Georgievich Shmorgun ◽

Artem I. Bogdanov ◽

D.V. Shcherbin

Keyword(s):

Diffusion Zone ◽

Heating Temperature ◽

Layered Composite ◽

Heterogeneous Structure ◽

Diffusion Interaction ◽

Qualitative Effect ◽

Phase And Chemical Composition ◽

Kinetics Of ◽

Temperature Time ◽

Melted Metal

The structure, phase and chemical composition of the diffusion interaction zone, formed at the interlayer boundary of a layered composite of the alloy Cr15Ni60-aluminum AD1, are studied. The temperature-time conditions for its nucleation and growth are determined. The diffusion zone has a fine predominantly heterogeneous structure and consists of solid solutions based on aluminides Al3Ni, Al3Ni2 and Al7Cr, as well as the ternary compound Al5FeNi. It is shown that the intensity of diffusion zone growth at the interlayer boundary of the bimetal Cr15Ni60-AD1 is determined mainly by the heating temperature, and the dependence of its thickness on the exposure time obeys a parabolic law. The presence of chemical micro-inhomogeneity in the form of a melted metal at the interlayer boundary does not have a qualitative effect on the kinetics of the process: at the first stage, the diffusion zone repeats the contour of the fusion, and then, as the service time increases, «absorbs» it.

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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

IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY ◽

10.35211/1990-5297-2021-2-249-7-11 ◽

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.

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