scholarly journals Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method

Materials ◽  
2011 ◽  
Vol 4 (12) ◽  
pp. 2231-2243 ◽  
Author(s):  
Joan Torrens-Serra ◽  
Shankar Venkataraman ◽  
Mihai Stoica ◽  
Uta Kuehn ◽  
Stefan Roth ◽  
...  
Keyword(s):  
Kinetic Analysis ◽  
Metallic Glasses ◽  
Master Curve ◽  
Master Curve Method ◽  
Curve Method ◽  
Isothermal Kinetic Analysis ◽  
Isothermal Kinetic

Isothermal kinetic analysis of the thermal decomposition of kaolinite: The thermogravimetric study

2010 ◽  
Vol 501 (1-2) ◽  
pp. 24-29 ◽  
Author(s):  
Petr Ptáček ◽  
Dana Kubátová ◽  
Jaromír Havlica ◽  
Jiří Brandštetr ◽  
František Šoukal ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Analysis ◽  
Thermogravimetric Study ◽  
Isothermal Kinetic Analysis ◽  
Isothermal Kinetic

Prediction of Fracture Toughness for WWER RPV Integrity Assessment on the Basis of the Unified Curve Approach and Surveillance Specimens Testing

2009 ◽  
Author(s):  
Boris Margolin ◽  
Victoria Shvetsova ◽  
Alexander Gulenko ◽  
Valentin Fomenko
Keyword(s):  
Fracture Toughness ◽  
Master Curve ◽  
Present Report ◽  
Temperature Shift ◽  
Curve Shape ◽  
Integrity Assessment ◽  
Master Curve Method ◽  
Curve Method ◽  
Unified Curve ◽  
Surveillance Specimens

For construction of the fracture toughness temperature curve that may be used for WWER RPV integrity assessment on the basis of tests of cracked surveillance specimens, the issues have to be solved as follows. First of all, it is important to determine how fracture toughness varies as a function of temperature, and how the fracture toughness vs. temperature dependence, KJC(T), changes with in-service material degradation due to neutron irradiation. These variations of KJC(T) curve are known to be the shift of KJC(T) curve to higher temperature range and change in the KJC(T) curve shape. At present, two advanced engineering methods are known that allow the prediction of KJC(T) curve on the basis of small-size fracture toughness specimens (for example, pre-cracked Charpy specimens), namely, the Master Curve and the Unified Curve methods. Procedures of test result treatment for the Master Curve and the Unified Curve are very similar. The Master Curve method uses the lateral temperature shift condition and, therefore, does not describe possible change in the KJC(T) curve shape. The Unified Curve method has an advantage as compared with the Master Curve as the Unified Curve describes a variation of the KJC(T) curve shape when degree of embrittlement increases. This advantage becomes important for RPV integrity assessment when the reference KJC(T) curve is recalculated to the crack front length of the postulated flaw that is considerable larger than thickness of surveillance specimens. Application of the KJC(T) curve determined from test results of cracked surveillance specimens to RPV integrity assessment requires also to introduce some margins. These margins have to take into account the type and number of tested specimens and the uncertainty connected with spatial non-homogeneity of RPV materials. Indeed, there is sufficient number of experimental data showing variability in fracture toughness for various parts of RPV. Therefore, situation is possible when the material properties near the postulated flaw will be worse than the properties of surveillance specimens. In the present report, advanced approaches are considered for prediction of fracture toughness for WWER RPV integrity assessment that allow one: • to construct the KJC(T) curve for irradiated RPV steels with any degree of embrittlement; • to provide transferability of fracture toughness data from cracked surveillance specimens to calculation of resistance to brittle fracture of RPV with a postulated flaw.

Non-isothermal kinetic analysis of illite dehydroxylation

2019 ◽  
Author(s):  
Tomáš Ondro ◽  
Omar Al-Shantir ◽  
Filip Obert ◽  
Anton Trník
Keyword(s):  
Kinetic Analysis ◽  
Isothermal Kinetic Analysis ◽  
Isothermal Kinetic

Thermal dehydration of (C6H5NH3)4Mo8O26 · 2H2O. Isothermal kinetic analysis

1984 ◽  
Vol 75 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
C. Santiago Gonzalez de Garibay ◽  
A.Irabien Gulias ◽  
A.R.Arnaiz Lázaro
Keyword(s):  
Kinetic Analysis ◽  
Thermal Dehydration ◽  
Isothermal Kinetic Analysis ◽  
Isothermal Kinetic

The non-isothermal kinetic analysis of the thermal decomposition of kaolinite by thermogravimetric analysis

2010 ◽  
Vol 204 (2-3) ◽  
pp. 222-227 ◽  
Author(s):  
Petr Ptáček ◽  
Dana Kubátová ◽  
Jaromír Havlica ◽  
Jiří Brandštetr ◽  
František Šoukal ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Thermogravimetric Analysis ◽  
Kinetic Analysis ◽  
Isothermal Kinetic Analysis ◽  
Isothermal Kinetic
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