Isothermal solid-state transformation kinetics applied to Pd/Cu alloy membrane fabrication

AIChE Journal ◽  
2010 ◽  
Vol 56 (12) ◽  
pp. 3062-3073 ◽  
Author(s):  
Natalie Pomerantz ◽  
Yi Hua Ma ◽  
E. Andrew Payzant
Keyword(s):  
Solid State ◽  
Transformation Kinetics ◽  
State Transformation ◽  
Solid State Transformation ◽  
Cu Alloy ◽  
Membrane Fabrication

The effect of geometrical assumptions in modeling solid-state transformation kinetics

1998 ◽  
Vol 29 (12) ◽  
pp. 2925-2931 ◽  
Author(s):  
Yvonne van Leeuwen ◽  
Simone Vooijs ◽  
Jilt Sietsma ◽  
Sybrand Van Der Zwaag
Keyword(s):  
Solid State ◽  
Transformation Kinetics ◽  
State Transformation ◽  
Solid State Transformation

Predicting Solid-State Phase Transformations during Welding of Ferritic Steels

2012 ◽  
Vol 706-709 ◽  
pp. 1403-1408 ◽  
Author(s):  
Cory J. Hamelin ◽  
Ondrej Muránsky ◽  
Philip Bendeich ◽  
Ken Short ◽  
Lyndon Edwards
Keyword(s):  
Solid State ◽  
Phase Transformations ◽  
Current Model ◽  
Input Parameter ◽  
Isothermal Transformation ◽  
Ferritic Steels ◽  
Correct Identification ◽  
Transformation Kinetics ◽  
State Transformation ◽  
Solid State Transformation

The current work presents the numerical analysis of solid-state transformation kinetics relating to conventional welding of ferritic steels, with the aim of predicting the constituent phases in both the fusion zone and the heat affected zone (HAZ) of the weldment. The analysis begins with predictions of isothermal transformation kinetics using thermodynamic principles, such that the chemical composition of the parent metal is the sole user-defined input. The data is then converted to anisothermal transformation kinetics using the Scheil-Avrami additive rule, including the effects of peak temperature and austenite grain growth. Subroutines developed for the Abaqus finite element package use the semi-empirical approach described to predict phase transformations in SA508 Gr.3 Cl.1 steel. To study the effect of the cooling rates and the ability of the current model to predict the final microstructure, two weld samples were subjected to autogenous beam TIG welds under a fast (TG5-F, 5.00 mm/s) and slow (TG5-S, 1.25 mm/s) torch speed. Model validation is carried out by direct comparison with microstructural observations and hardness measurements (via nanoindentation) of the fusion and heat affected zones in both welds. Excellent agreement between the measured and predicted hardness has been found for both weld samples. Additionally, it is shown that the correct identification of the partial austenisation region is a crucial input parameter.

Solid-state Transformation of Achiral Crystals to a Chiral Crystal by Guest Release from Host–Guest Inclusion Crystals of Achiral Host Compound

2009 ◽  
Vol 38 (11) ◽  
pp. 1080-1081 ◽  
Author(s):  
Hironori Saito ◽  
Mitsuaki Suzuki ◽  
Hiroshi Miyamae ◽  
Naoto Hayashi ◽  
Keiji Kobayashi
Keyword(s):  
Solid State ◽  
State Transformation ◽  
Solid State Transformation ◽  
Host Compound

scholarly journals Maskelynite formation via solid-state transformation: Evidence of infrared and X-ray anisotropy

2015 ◽  
Vol 120 (3) ◽  
pp. 570-587 ◽  
Author(s):  
Steven J. Jaret ◽  
William R. Woerner ◽  
Brian L. Phillips ◽  
Lars Ehm ◽  
Hanna Nekvasil ◽  
...  
Keyword(s):  
Solid State ◽  
State Transformation ◽  
Solid State Transformation ◽  
X Ray

Solid-State Reactions in Multilayer Ni/Ti Thin Film Composites

1990 ◽  
Vol 205 ◽  
Author(s):  
Gillian E. Winters ◽  
K.M. Unruh ◽  
C.P. Swann ◽  
M.E. Patt ◽  
B.E. White ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reactions ◽  
Metastable Solid Solution ◽  
State Transformation ◽  
Solid State Transformation ◽  
Scanning Calorimetry ◽  
The Individual ◽  
Thin Film Composites ◽  
Film Composites ◽  
Rf Sputter Deposition

AbstractMultilayer films, consisting of alternating layers of crystalline Ni and Ti, have been prepared by RF sputter deposition over a range of modulation wavelengths corresponding to an overall composition of Ni50Ti50. These films have been characterized by xray diffraction and Rutherford backscattering measurements. The solid-state transformation by interdiffusional mixing of the individual layers has been directly studied by differential scanning calorimetry and correlated with structural measurements. These measurements indicate that the solid-state reaction of Ni and Ti multilayers proceeds through the formation of a metastable solid solution of Ti in Ni followed by the formation of intermetallic equilibrium compounds. No direct calorimetric or structural evidence for the formation of an amorphous Ni-Ti phase has been found in these samples.

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