A Mixed-Mode Model Considering Soft Impingement Effects for Solid-State Partitioning Phase Transformations

2011 ◽  
Vol 172-174 ◽  
pp. 561-566 ◽  
Author(s):  
Hao Chen ◽  
Sybrand van der Zwaag
Keyword(s):  
Phase Transformation ◽  
Solid State ◽  
Numerical Solution ◽  
Phase Transformations ◽  
Concentration Gradient ◽  
Mixed Mode ◽  
Original Model ◽  
Polynomial Method ◽  
Soft Impingement ◽  
Kinetics Of

The original mixed-mode model is reformulated by considering the soft impingement effect and applying a general polynomial method of dealing with the concentration gradient in front of the interface. Comparison with the numerical solution shows that the reformulated mixed-mode model is more precise than the original model. The effect of soft impingement on the kinetics of partitioning phase transformation depends on both the growth mode and the degree of super-saturation.

A concise model for mixed-mode phase transformations in the solid state

2004 ◽  
Vol 52 (14) ◽  
pp. 4143-4152 ◽  
Author(s):  
Jilt Sietsma ◽  
Sybrand van der Zwaag
Keyword(s):  
Solid State ◽  
Phase Transformations ◽  
Mixed Mode

The use of lattice-parameter changes to trace the kinetics of phase transformations powder-diffraction analysis of disorder-order transformations in Ni1+δSn

2007 ◽  
Vol 222 (3-4) ◽  
Author(s):  
Andreas Leineweber ◽  
Eric J. Mittemeijer
Keyword(s):  
Phase Transformation ◽  
Diffraction Analysis ◽  
Phase Transformations ◽  
Powder Diffraction ◽  
Lattice Parameter ◽  
X Ray ◽  
Kinetics Of

The measurement of lattice-parameter changes by X-ray powder diffraction as a function of the progress of a phase transformation (

Numerical Simulation of Deformations in T-Joint Welded by the Laser Beam

2013 ◽  
Vol 58 (4) ◽  
pp. 1391-1396 ◽  
Author(s):  
W. Piekarska ◽  
M. Kubiak ◽  
Z. Saternus
Keyword(s):  
Numerical Simulation ◽  
Solid State ◽  
Laser Beam ◽  
Phase Transformations ◽  
Laser Beam Welding ◽  
Thermomechanical Properties ◽  
Engineering Software ◽  
Kinetics Of ◽  
Fortran Programming Language ◽  
Structural Strain

Abstract Numerical simulation of deformations in laser welded T-joint is carried out in this study. The analysis is performed using Abaqus FEA engineering software. Additional author’s numerical subroutines, written in FORTRAN programming language are used in computer simulations where models of the distribution of movable laser beam heat source, kinetics of phase transformations in solid state as well as thermal and structural strain are implemented. Thermomechanical properties of welded material changing with temperature are taken into account in the analysis. Presented results of numerical simulations performed for the laser beam welding of two perpendicularly arranged sheets include temperature distribution, kinetics of phase transformations in solid state, thermal and structural strain as well as estimated welding deformations.

Analysis of Interface Dynamics in Solid-State Phase Transformations by In Situ Hot-Stage High-Resolution Transmission Electron Microscopy

1994 ◽  
Vol 332 ◽  
Author(s):  
James M. Howe ◽  
W. E. Benson ◽  
A. Garg ◽  
Y.-C. Chang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Solid State ◽  
High Resolution ◽  
Phase Transformations ◽  
Interface Motion ◽  
Transmission Electron ◽  
Kinetics Of ◽  
Dynamics Of Interfaces

ABSTRACTIn situ hot-stage high-resolution transmission electron microscopy (HRTEM) provides unique capabilities for quantifying the dynamics of interfaces at the atomic level. Such information is critical for understanding the theory of interfaces and solid-state phase transformations. This paper provides a brief description of particular requirements for performing in situ hot-stage HRTEM, summarizes different types of in situ HRTEM investigations and illustrates the use of this technique to obtain quantitative data on the atomic mechanisms and kinetics of interface motion in precipitation, crystallization and martensitic reactions. Some limitations of in situ hot-stage HRTEM and future prospects of this technique are also discussed.

Prediction of the kinetics of the phase transformations and the associated microstructure during continuous coolingin the Ti17

2004 ◽  
Vol 120 ◽  
pp. 93-101
Author(s):  
J. Da Costa Teixeira ◽  
L. Héricher ◽  
B. Appolaire ◽  
E. Aeby-Gautier ◽  
G. Cailletaud ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Phase Transformation ◽  
Phase Transformations ◽  
Phase Field ◽  
Experimental Results ◽  
Thermal Treatments ◽  
Thermal Gradients ◽  
Resistivity Measurements ◽  
Isothermal Conditions ◽  
Kinetics Of

The aim of this paper is to present recent experimental results and related simulation about the β → αGB + αWGB and → αWI transformations which occur in the Ti17 alloy during the thermal treatments following the heating in the β phase field. These phase transformations were experimentally studied under isothermal conditions in samples with negligible thermal gradients. The IT diagram was obtained, on the basis of electrical resistivity measurements and microstructural SEM observations. The kinetics of the phase transformation was further numerically simulated for continuous cooling on the basis of a formerly developed model giving the amount of each morphology (αWGB, αWI). Experimental and calculated results are compared.

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