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mesoscale physics-based model

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Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005459
EISBN: 978-1-62708-196-2
... methodologies. These include JMAK (Avrami) models, topological models, and mesoscale physics-based models. microstructure evolution thermomechanical processing nickel-base superalloys avrami model topological model mesoscale physics-based model THE MODELING OF MICROSTRUCTURE EVOLUTION during...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005544
EISBN: 978-1-62708-197-9
... and metastable phase equilibrium, solidification behavior and properties, mechanical properties, thermophysical and physical properties, phase transformations, and chemical properties. Sente Software www.sentesoftware.co.uk MeltCalc Thermodynamic modeling spreadsheet for Excel Corbett Research...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003729
EISBN: 978-1-62708-177-1
... at the microlevel. The visualization of the length scale of the microstructure through computer graphical output became possible. Based on the mathematics used to describe the physics, solidification models can be classified as deterministic or probabilistic ( Fig. 1 ). The final product of the computation can...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005403
EISBN: 978-1-62708-196-2
... DRX conditions. Fig. 7 Avrami plot of the softening data of Fig. 1(a) prepared using ε p and σ p − σ Mesoscale Approach for DDRX By contrast to the Avrami phenomenological approach, the mesoscale (or grain scale) models take the basic physical mechanisms into account...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005432
EISBN: 978-1-62708-196-2
... of data transfer. A practical requirement in these coupled models is that the CA cell spacing is smaller than the finite-element node spacing, and this means that clusters of CA cells adopt the same macroscopic state variables as one another, based on the distribution of the finite-element nodes ( Ref 22...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004027
EISBN: 978-1-62708-185-6
... a competitive edge. This requires improved insight and the development of physically based or “white-box” models, in which the evolution of each of the microstructure variables can be described in a deterministic way. Such models are generic and widely applicable to a range of alloys and thermomechanical...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006307
EISBN: 978-1-62708-179-5
.... To make this happen, the atoms must move by using dislocations and/or crack formation. For one-phase or simple-shaped structured materials, physically based deformation models are available. For cast iron, with free-form phases in three dimension, it is not yet possible. This article outlines some ways...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005415
EISBN: 978-1-62708-196-2
...-interface limit ( Ref 25 ). Quantitative phase-field simulations at coarse-grained mesoscale levels have since been carried out extensively with the new thin-interface analyses ( Ref 25 , Ref 26 , Ref 27 , Ref 28 ). Some simple techniques ( Ref 29 , 30 ) based on physical arguments of equivalent driving...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005414
EISBN: 978-1-62708-196-2
... kinetics Models for recrystallized grain size Models for austenite decomposition While attempts have been made by researchers to develop physically based models for recrystallization and grain growth ( Ref 12 , Ref 13 , Ref 14 , Ref 15 ), most of the models being used today (2009...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005421
EISBN: 978-1-62708-196-2
... Abstract This article focuses on the modeling and simulation of cavitation phenomena. It summarizes the experimental observations of cavitation and reviews the modeling of cavity nucleation and growth. The article discusses the modeling of the cavity growth based on mesoscale and microscale...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005434
EISBN: 978-1-62708-196-2
... models. The goal of this article is twofold: First, it introduces the underlying physics and the basics of VPP modeling, with a special emphasis on transport phenomena; second, examples of or-phase models, from pioneer to state-of-the-art models, are illustrated through representative works...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005409
EISBN: 978-1-62708-196-2
... for Ti-6Al-4V have provided the basis for mechanism-based models based on flow localization/shear banding/shear fracture, the pinch-off of alpha plates by beta, and spheroidization controlled by termination migration. Each of these is discussed as follows. Flow Localization Analysis Observations...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006546
EISBN: 978-1-62708-290-7
... the form of a finite-element model, where each element models the chemical reactions that occur, as well as other physical phenomena that the modeler deems relevant. The phenomena are typically heat generation and transfer, diffusion of reacting species, and possibly diffusion of oxygen (which functions...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006033
EISBN: 978-1-62708-175-7
... illustrates the typical procedure for computer simulation for press and sinter process. It describes the procedure to obtain the material properties based on the generalized Shima-Oyane model. The article presents a wide variety of tests, accounting for data on the grain growth, densification, and distortion...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005502
EISBN: 978-1-62708-197-9
... two wires) with a single diffusion mechanism. These simulations were slow, requiring ten times more computer time than the actual physical sintering time. Most damaging, these early models were unstable, because they lost volume and increased energy. However, within 20 years the concept was extended...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009002
EISBN: 978-1-62708-185-6
... ( 6 / f v ) 1 3 Mechanistic Models for Microstructure Evolution A number of mechanism-based approaches have been developed to model microstructure evolution during hot working and annealing. These models incorporate deterministic and statistical aspects to varying degrees...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005504
EISBN: 978-1-62708-197-9
... structures in materials. Three-dimensional (3-D) microstructural characterization and analysis techniques have recently become much more common ( Ref 1 , Ref 2 , Ref 3 , Ref 4 ), and using the resultant 3-D experimental data as input for simulations, that is, employing image-based 3-D modeling ( Ref 5...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005501
EISBN: 978-1-62708-197-9
... calculations are the base for the prediction of solidification. The diffusion transport in the solid phase must be solved for each element. This requires knowledge of the diffusion coefficient of the element, the length scale, and the cooling conditions. Thermodynamic modeling has recently become increasingly...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003400
EISBN: 978-1-62708-195-5
... dictating the pullout process are made through a LSB mechanics ( Ref 9 ). Some typical experimental results for the fracture resistance behavior of a class I material are shown in Fig. 4 . For comparison, predictions based on both LSB and SSB models, described subsequently, are shown also. Fig. 4...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.9781627081962
EISBN: 978-1-62708-196-2