Thermal diffusivity investigation of Fe61Ni39, Fe52Ni48 and Fe40Ni60 binary iron–nickel alloys using the modified pulse method

Terpiłowski, Janusz; Rudzki, Rafał; Szczepaniak, Robert; Woroniak, Grzegorz

doi:10.1016/j.jallcom.2015.10.170

Cited by 4 publications

(5 citation statements)

References 22 publications

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“…Similarly, as in [ 39 , 40 ], in this case, the sample of Fe65Ni35 was subjected to an examination using an approximate-value external magnetic-field to identify changes in its structure as a function of temperature (ferromagnetic paramagnetic). The test was carried out on an identical stand as that in [ 39 ] during one cycle, including the heating and cooling of the tested sample. Test-bench testing was carried out on a Ni999 sample with a diameter of 12 mm and a thickness of 1.85 mm.…”

Section: Resultsmentioning

confidence: 99%

“…Measuring signals

and

, which were used to determine the discrete thermal-diffusivity values

of the tested sample at

temperature, were recorded using thermocouples, as shown in Figure 2 a, in the form of thermoelectric voltages

and

. The procedure for determining the typically unknown Seebeck coefficient

, according to [ 39 , 42 ], is given by:

where

, Seebeck coefficient of the junctions “material of the sample—thermoelectric wire”; and

, Seebeck coefficient of the junction “thermoelectric wire B—thermoelectric wire C”, could be obtained from, e.g., [ 44 ].…”

Section: Short Description Of Methods and Test Benchmentioning

confidence: 99%

“…Our first work in this area [ 39 ] concerned the study and interpretation of the temperature characteristics a ( T ) of the Fe61Ni39, Fe52Ni48, and Fe40Ni60 alloys in the temperature range of 20–700 °C. The next work [ 40 ] concerned the interpretation of characteristics

of the metastable Fe80Ni20 alloy, ranging from ambient temperature to about 650 °C.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Phase Transformation of Fe65Ni35 Alloy by the Modified Pulse Method

et al. 2020

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This paper presents the possibility of using a modified-pulse method (MPM) determining the temperature characteristics of thermal diffusivity in order to identify phase transformations in metals. The experiment and attempt of phase identification were conducted for the Fe65Ni35 alloy in the 20–500 °C temperature range during both sample heating and cooling. The estimated error of discrete thermal diffusivity measurements was less than 3%. The method allows us to narrow down the averaging of the interval of this value, as a function of temperature, in the range below 1 K. Recently published analysis of the phase diagrams of Fe–Ni alloys, and the results of the authors’ own research into the Fe65Ni35 alloy, showed very good correlation between changes occurring when heating the alloy and the equilibrium diagram provided by Cacciamani G., Dinsdale A., Palumbo M., and Pasturel A. (Intermetallics 18, 2010, 1148–1162) showing the position of phases with a crystal-lattice structure based on the face-centered cubic (FCC) cell.

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Section: Resultsmentioning

confidence: 99%

“…Measuring signals

and

, which were used to determine the discrete thermal-diffusivity values

of the tested sample at

temperature, were recorded using thermocouples, as shown in Figure 2 a, in the form of thermoelectric voltages

and

. The procedure for determining the typically unknown Seebeck coefficient

, according to [ 39 , 42 ], is given by:

where

, Seebeck coefficient of the junctions “material of the sample—thermoelectric wire”; and

, Seebeck coefficient of the junction “thermoelectric wire B—thermoelectric wire C”, could be obtained from, e.g., [ 44 ].…”

Section: Short Description Of Methods and Test Benchmentioning

confidence: 99%

of the metastable Fe80Ni20 alloy, ranging from ambient temperature to about 650 °C.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Phase Transformation of Fe65Ni35 Alloy by the Modified Pulse Method

et al. 2020

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“…This work shows ways of assessing the thermophysical properties of a material using a parameter (i.e., thermal diffusivity by means of the modified flash method (MPM)). It seems that the use of this method, significantly different from other methods used to determine the thermal diffusivity of solids [10,[14][15][16][17][18][19][20][21][22][23], is justified mostly by its much higher accuracy in determining the a(T) of the tested materials.…”

Section: Introductionmentioning

confidence: 99%

Thermal Diffusivity Characteristics of the IN718 Alloy Tested with the Modified Pulse Method

et al. 2022

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The article presents the use of the modified pulse method (MPM) to determine the temperature characteristics of the thermal diffusivity of alloy 718. The experiment was carried out in the temperature range of 20–900 °C during the double heating of the sample with an interval of two weeks. The results of our own research showed a good correlation in the temperature range of 300–500 °C, during the first heating of the sample, with the recommended changes in thermal diffusivity by NPL & ASM and data from the MPDB database. On the other hand, clear deviations in the results occurred in the range of temperature changes up to about 300 °C, most likely responsible for the electron component of the conductivity of this alloy, and in the range above 700 °C, where there is a clear minimum that may be caused by the δ phase precipitation phenomenon.

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“…Despite the numerous requirements and the wide range of research to be carried out, dynamic development in the field of aerospace materials is currently taking place [12][13][14]. The numerous material solutions presented in the literature testify to the constant interest of the scientific community in making a real impact on the occurrence of synergies between the acquisition of knowledge and its practical application [15][16][17][18][19][20][21][22]. The issues related to the modification of polymer matrix composites are new with respect to materials science, although they are extremely extensive due to the intensification of research carried out in scientific centers all over the world [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of Aviation Polymer Composites at Various Weight Fractions of Physical Modifier

et al. 2021

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The aim of this study was to determine the effect of a selected physical modifier with different granularity and mass percentage on the dynamics of aerospace polymer composites. The tests were carried out on samples made of certified aerospace materials used, among other purposes, for the manufacture of aircraft skin components. The hybrid composites were prepared from L285 resin, H286 hardener, GG 280T carbon fabric in twill 2/2 and alumina (Al2O3, designated as EA in this work). The manufactured composites contained alumina with grain sizes of F220, F240, F280, F320 and F360. The mass proportion of the modifier in the tested samples was 5% and 15%. The tested specimens, as cantilever beams fixed unilaterally, were subjected to kinematic excitation with defined parameters of amplitude and frequency excitation in the basic resonance zone of the structure. The results, obtained as dynamic responses, are presented in the form of amplitude–frequency characteristics. These relationships clearly indicate the variable nature of composite materials due to modifier density and grain size. The novelty of this study is the investigation of the influence of the alumina properties on system dynamics responses.

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Thermal diffusivity investigation of Fe61Ni39, Fe52Ni48 and Fe40Ni60 binary iron–nickel alloys using the modified pulse method

Cited by 4 publications

References 22 publications

Investigation of Phase Transformation of Fe65Ni35 Alloy by the Modified Pulse Method

Investigation of Phase Transformation of Fe65Ni35 Alloy by the Modified Pulse Method

Thermal Diffusivity Characteristics of the IN718 Alloy Tested with the Modified Pulse Method

Dynamic Behavior of Aviation Polymer Composites at Various Weight Fractions of Physical Modifier

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