Thermography of the phase transformations in nickel-based eutectic alloys at high pressures and temperatures

Падалко, А. Г.; Talanova, G. V.; Zubarev, G. I.; Fedotov, V. T.; Сучков, А. Н.; Tsarev, V. I.

doi:10.1134/s0036029511030116

Cited by 4 publications

(2 citation statements)

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“…The alloy synthesis process and sample preparation procedures were described in sufficient detail elsewhere [9][10][11][12][13]. A possible way to study the phase transformations at high pressures and temperatures is to use the previously developed differential barothermal analysis (DBA) technique [9][10][11][12][13].…”

Section: Methodsmentioning

confidence: 99%

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Barothermography and microstructure of the hypoeutectic and eutectic alloys in Al–Si system

Dediaeva

Падалко

Akopyan

et al. 2015

J Therm Anal Calorim

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Differential barothermal analysis (DBA or HP-DTA) of the phase transformations in hypoeutectic Al-10 at.% Si and eutectic Al-12 at.% Si alloys was carried out at 100 MPa of argon pressure and at temperatures up to 700°C. Liquidus temperature of Al-10 at.% Si is reduced during melting and crystallization by 3-4°C as compared with the atmospheric pressure data. Increase in the eutectic transformation L ? (Al) ? Si temperature up to 580-581°C during heating was found for the Al-10 at.% Si and Al-12 at.% Si alloys. According to the barothermography data, a slight thermal effect at 553°C is detected for both alloys, which was identified as the decomposition of aluminum-based solid solution and precipitation of silicon particles. The improvement of silicon phase morphology for Al-10 at.% Si and Al-12 at.% Si alloys after hot isostatic pressing (HIP) at the pressure of 100 MPa and temperature of 550°C was found. No porosity in the alloy has been established after HIP treatment. After HIP thermal expansion, coefficients of the alloy are noticeably decreased by 25 (Al-10 at.% Si) and 50 % (Al-12 at.% Si).

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Section: Methodsmentioning

confidence: 99%

“…A possible way to study the phase transformations at high pressures and temperatures is to use the previously developed differential barothermal analysis (DBA) technique [9][10][11][12][13]. Microstructures were examined at first on a MeF3 light microscope (Austria), equipped with a digital imaging accessory.…”

Section: Methodsmentioning

confidence: 99%