Characterization of crystallization kinetics of a Ni- (Cr, Fe, Si, B, C, P) based amorphous brazing alloy by non-isothermal differential scanning calorimetry

Raju, S.; Kumar, N.; Jeyaganesh, B.; Mohandas, E.; Mudali, U. Kamachi

doi:10.1016/j.jallcom.2006.09.058

Cited by 21 publications

(24 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The DSC experiments were performed with a Setaram Setsys 16 heat-flux type high-temperature differential scanning calorimeter, employing recrystallized alumina crucibles of about 100 µL volume. The description of the equipment and the calibration procedure has been discussed in a previous publication [22]. Stated briefly, the experiments were performed under a constant flow (50 mL · min −1 ) of high purity (99.999 %) argon.…”

Section: P Measurements Using Dscmentioning

confidence: 99%

“…Although the physical metallurgy of standard Cr-Mo steels is replete with many experimental and theoretical investigations on phase stability and microstructure evolution during heat treatments [8][9][10][11][12][13][14][15][16][17][18][19][20][21], there seems to be a general paucity of experimental data on various thermodynamic quantities [20]. It is clear that a consistent thermodynamic data set is essential from the point of view of understanding as well as predicting the long-term phase stability of alloys [10,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Study on the Effect of Thermal Ageing on the Specific-Heat Characteristics of 9Cr–1Mo–0.1C (mass%) Steel

et al. 2009

Self Cite

View full text Add to dashboard Cite

The effect of thermal ageing on the heat-capacity behavior of 9Cr-1Mo-0.1C (mass%) ferritic/martensitic steel has been studied using differential scanning calorimetry (DSC) in the temperature range from 473 K to 1,273 K. The DSC results in the case of slow cooled, normalized and tempered, and subsequently thermally aged samples (500 h to 5,000 h at 823 K (550 • C) and 923 K (650 • C), clearly marked the presence of both magnetic and α-ferrite + carbide → γ -austenite phase transformations that take place successively upon heating. Furthermore, for the case of fully martensitic microstructure, an additional exothermic transformation at about 920 K (647 • C), arising from carbide precipitation is noticed. This event is characterized by a sharp drop in C P . It is found that the α-ferrite + carbide → γ -austenite phase transformation temperature is only mildly sensitive to microstructural details, but the enthalpy change associated with this phase transformation, and especially the change in specific heat around the transformation regime, are found to be dependent on the starting microstructure generated by thermal ageing treatment. Prolonged ageing for about 500 h to 5,000 h in the temperature range from 823 K to 923 K (550 • C to 650 • C) contributed to a decrease in heat capacity, as compared to the normalized and tempered sample. This is due to the increase in carbide volume fraction. The martensitic microstructure is found to possess the lowest room-temperature C P among different microstructures.

show abstract

Section: P Measurements Using Dscmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Study on the Effect of Thermal Ageing on the Specific-Heat Characteristics of 9Cr–1Mo–0.1C (mass%) Steel

et al. 2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…The description of the equipment and the calibration procedure has been discussed in detail in our previous publication [7]. The samples for DSC experiments were sliced from the original block using diamond coated wire saw.…”

Section: Dsc Studiesmentioning

confidence: 99%

“…= 301.98(T (K)) + 0.1(T (K)) 2 + 9.61 × 10 −6 (T (K)) 3 (6) C P (J kg −1 K −1 ) = 301.98 + 0.2(T (K)) + 28.82 × 10 −6 (T (K)) 2 (7) As mentioned previously, the variation of enthalpy in the two-phase region is irregular that a simple functional representation of it is rather difficult. However, it is possible to obtain a direct estimate of C P , through differential scanning calorimetry experiments.…”

Section: Analytical Representation Of Drop Calorimetry Datamentioning

confidence: 99%

Thermal property characterization of a Ti–4wt.%Nb–4wt.%Zr alloy using drop and differential scanning calorimetry

Anbarasan

Ganesh

Raju

et al. 2008

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

“…Because the available DSC data were obtained at the various heating rates of the samples, the values were given for the one heating rate (20 °C/min). For this purpose the data on the crystallization temperature dependence of the heating rate for the amorphous alloy Ni 65 Cr 6,6 Fe 3 B 17,5 Si 7,6 C 0,3 for all three stages of the crystallization process were used [5].…”

Section: Resultsmentioning

confidence: 99%

Influence of the chemical composition of rapidly quenched amorphous alloys (Ni, Fe, Cr)-B-Si on its crystallization process

Elmanov

Джумаев

Ivanitskaya

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. This paper presents results of research of the structure and phase transformations during the multistage crystallization of the metallic glasses with the compositions Ni 71,5 Cr 6,8 Fe 2,7 B 11,9 Si 7,1 and Ni 63,4 Cr 7,4 Fe 4,3 Мn 0,8 B 15,6 Si 8,5 labeled as AWS BNi-2 according to American Welding Society. Differential scanning calorimetry (DSC), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray microanalysis (EDX) were used as experimental research methods. The influence of the alloys chemical composition (boron, manganese and iron) on the temperatures and the exothermic heat effects of phase transformations, as well as on the phase composition of alloys at three stages of crystallization was analyzed. We present a thermodynamic explanation of the observed heat effects. It has been shown that manganese has the main influence on the phase transformations temperatures and heat effects in these two alloys. It is also assumed that at the final crystallization stage simultaneously with the formation of phases Ni 3 B and β 1 -Ni 3 Si should occur the nucleation of borides of CrB type with high Cr and low Si content.

show abstract

Characterization of crystallization kinetics of a Ni- (Cr, Fe, Si, B, C, P) based amorphous brazing alloy by non-isothermal differential scanning calorimetry

Cited by 21 publications

References 16 publications

A Study on the Effect of Thermal Ageing on the Specific-Heat Characteristics of 9Cr–1Mo–0.1C (mass%) Steel

A Study on the Effect of Thermal Ageing on the Specific-Heat Characteristics of 9Cr–1Mo–0.1C (mass%) Steel

Thermal property characterization of a Ti–4wt.%Nb–4wt.%Zr alloy using drop and differential scanning calorimetry

Influence of the chemical composition of rapidly quenched amorphous alloys (Ni, Fe, Cr)-B-Si on its crystallization process

Contact Info

Product

Resources

About