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High Temperatures - High PressuresVolume 44, Issue 4, 2015, Pages 265-283

Divergence of temperature dependences of gamma-ray beam attenuation in the penetrated zone of Cu-Al melts at heating and subsequent cooling(Article)

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  • aUral Institute of State Fire Service, Russian Ministry of Emergency Situations, 22 Mira St., Yekaterinburg, 620009, Russian Federation
  • bRussian State Pedagogical University, 26 Cosmonavtov Ave., Yekaterinburg, 620017, Russian Federation

Abstract

The authors made an attempt at measuring temperature dependencies of Cu-Al melts density by the absolute method of gamma-penetration at heating the samples after melting up to 1300-1400°C and at their subsequent cooling. A divergence of gamma-ray beam attenuation curves corresponding to heating and cooling branches (hysteresis) has been found. This phenomenon is especially pronounced for alloys rich in aluminum, including CuAl (n-phase) and CuAl2 (θ-phase) compounds. The authors explain it by the irreversible breakdown of the metastable microheterogeneous state of melts inherited from the original crystal sample or appearing in the process of melting. This happens at heating up to homogenizing temperature which varies depending on the sample and which is close to the branching point of the curves. © 2015 Old City Publishing, Inc.

Author keywords

Cu-Al meltsDensityGamma-methodMetastable microheterogeneity

Indexed keywords

Engineering controlled terms:AluminumCoolingDensity (specific gravity)HeatingMeltingTemperature distribution
Engineering uncontrolled termsGamma methodGamma-ray beam attenuationHeating and coolingMeasuring temperatureMicro-heterogeneousMicroheterogeneitySubsequent coolingTemperature dependence
Engineering main heading:Gamma rays
  • ISSN: 00181544
  • Source Type: Journal
  • Original language: English
  • Document Type: Article
  • Publisher: Old City Publishing

  Popel, P.S.; Russian State Pedagogical University, 26 Cosmonavtov Ave., Yekaterinburg, Russian Federation
© Copyright 2015 Elsevier B.V., All rights reserved.

Cited by 3 documents

Popel’, P.S. , Sidorov, V.E. , Brodova, I.G.
Effect of Heat Treatment of a Melt on the Structure and Properties of the Corresponding Crystalline Ingots or Castings
(2020) Russian Metallurgy (Metally)
Dahlborg, U. , Calvo-Dahlborg, M. , Eskin, D.G.
Thermal Melt Processing of Metallic Alloys
(2018) Springer Series in Materials Science
Popel, P. , Dahlborg, U. , Calvo-Dahlborg, M.
On the existence of metastable microheterogeneities in metallic melts
(2017) IOP Conference Series: Materials Science and Engineering
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