Some aspects of superplastic flow of eutectic alloys connected with metastability

Korshak, V. F.; Shapovalov, Yu. A.

doi:10.1134/s0031918x09040103

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…It has been shown that, at the rates of solidification that ensure the manifesta tion of the superplasticity effect, the volume proportion between the tin based and lead based phases in the alloy do not correspond to that predicted by the equilib rium tin-lead phase diagram [3][4][5]. In the experiments performed in [6,7], it has been established that the aging is accompanied by changes in the phase state of the Sn-38 wt % Pb alloy. However, no equilibrium is reached even after sufficiently long holding.…”

Section: Introductionmentioning

confidence: 98%

X-ray diffraction study of structural and phase states of a superplastic Sn-38 wt % Pb alloy and their variations under the effect of external mechanical stresses and aging

Korshak

Shapovalov

Samsonik

et al. 2012

Phys. Metals Metallogr.

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Structural and phase states of the eutectic alloy Sn-38 wt % Pb, which exhibits superplastic prop erties at room temperature, have been studied using samples that were cast, forged in a hydraulic press tõ 73%, aged in the as cast state, as well as preliminarily forged samples and samples deformed in the regime of superplasticity. It has been shown that the phase state of the alloy in as cast condition does not correspond to the equilibrium tin-lead phase diagram. The superplastic flow of the alloy occurs against the background of processes of decomposition of the supersaturated solid solution. In the preliminarily forged samples, the aging is accompanied by an increase in the concentration of lead in the surface layers. This is related, in par ticular, to the existence of tensile stresses in the tin based phase and to their relaxation in the process of aging. In the structure of cast and preliminarily forged samples, an amorphous crystalline component has been revealed, which most likely is located at grain boundaries. The experimental results agree well with the previ ously obtained results that are indicative of the nonequilibrium character of the initial structural phase state of the Sn-38 wt % Pb alloy and of the occurrence of structural phase transformations under conditions of superplastic deformation, and substantially supplement them.

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Section: Introductionmentioning

confidence: 98%

X-ray diffraction study of structural and phase states of a superplastic Sn-38 wt % Pb alloy and their variations under the effect of external mechanical stresses and aging

Korshak

Shapovalov

Samsonik

et al. 2012

Phys. Metals Metallogr.

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“…The use of the superplasticity effect makes it possible to significantly reduce deformation forces compared to traditional methods of hot metal forming and isothermal deformation, and to use low-power equipment. Superplastic deformation processes are promising for the manufacture of workpieces of complex shapes, they can significantly increase the utilization rate of metals and their durability, reduce the energy intensity and cost of technological processes, and the consumption of expensive materials [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Study of titanium alloy Ti–Al–Zr–Nb–V during heating under deformation and its phase transformation features

KENZHEGULOV,

MAMAEVA,

PANICHKIN

et al. 2024

J Met Mater Miner

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An alloy based on Ti–Al–Zr–Nb–V was prepared and its deformation behavior at elevated temperatures was studied. The microstructure and phase of the alloys were characterized by optical microscopy, scanning electron microscopy, thermal analysis, and mechanical testing. The results showed that the Ti–Al–Zr–Nb–V alloy, when stretched, exhibits a superplasticity effect in the range of 975℃ to 1100℃, with an elongation of up to 400%. It was found that superplasticity develops in the temperature region of the α+β→β transition and is accompanied by a change in grain size and redistribution of alloying elements among phases.

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Change in elastic properties of eutectic alloys under conditions of superplastic deformation

2018

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Some aspects of superplastic flow of eutectic alloys connected with metastability

Cited by 7 publications

References 3 publications

X-ray diffraction study of structural and phase states of a superplastic Sn-38 wt % Pb alloy and their variations under the effect of external mechanical stresses and aging

X-ray diffraction study of structural and phase states of a superplastic Sn-38 wt % Pb alloy and their variations under the effect of external mechanical stresses and aging

Study of titanium alloy Ti–Al–Zr–Nb–V during heating under deformation and its phase transformation features

Change in elastic properties of eutectic alloys under conditions of superplastic deformation

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