Effect of Cooling Rate on Structural and Chemical Microheterogeneity of IN 738LC Nickel Based Superalloy

Jana Dobrovská; Simona Dočekalová; Věra Dobrovská; Karel Stránský

doi:10.4028/www.scientific.net/SSP.138.201

Paper Titles

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Assessment of Heterogeneity of Welded Joint of Two Different Metals by Modeling of Diffusion of Substitution Elements
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Effect of Cooling Rate on Structural and Chemical Microheterogeneity of IN 738LC Nickel Based Superalloy
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Application of Statistical Moment Method to Thermodynamic Properties and Phase Transformations of Metals and Alloys
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The Analytical and Computational Thermodynamics of Closed Binary Systems
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Statistical Thermodynamics and Ordering Kinetics of D0₁₉-Type Phase: Application of the Models for H.C.P.-Ti–Al Alloy
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A Semi-Empirical Parameterization of Interatomic Interactions Based on the Statistical-Thermodynamic Analysis of the Data on Radiation Dif-fraction and Phase Equilibria in F.C.C.-Ni–Fe Alloys
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HomeSolid State PhenomenaSolid State Phenomena Vol. 138Effect of Cooling Rate on Structural and Chemical...

Effect of Cooling Rate on Structural and Chemical Microheterogeneity of IN 738LC Nickel Based Superalloy

Abstract:

The paper deals with the effect of cooling rate on solidification behavior of IN 738LC nickel based superalloy and on resulting structural and chemical microheterogeneity of this alloy. Samples taken from as-received state were heated with controlled ramp rates (1, 5, 10 and 20 °C min-1). Immediately after melting they were cooled with the same controlled ramp rate with the help of the laboratory experimental system SETARAM SETSYS 18TM TG/DTA/TMA. Then the microanalysis of minority phases was conducted with use of X-ray spectroscopy and microstructure of the individual samples was documented by scanning electron microscopy. Chemical microheterogeneity was determined on the basis of measured concentration data of selected elements (Al, Ti, Cr, Co, Ni, Nb, Mo, Ta and W) in representative areas of the individual samples structure.

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Solid State Phenomena (Volume 138)

Pages:

201-208

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.138.201

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Online since:

March 2008

Authors:

Jana Dobrovská, Simona Dočekalová, Věra Dobrovská, Karel Stránský

Keywords:

Cooling Rate, IN 738LC, Microheterogeneity, Microsegregation, X-Ray Spectroscopy

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