Computational Methods for Microstructure-Property Relationships

Ghosh, Somnath; Dimiduk, Dennis M.

doi:10.1007/978-1-4419-0643-4

Cited by 51 publications

(3 citation statements)

References 570 publications

(952 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is because these techniques provide micro-structural information that is quite valuable for a mechanistic interpretation of the failure. In this regard the use of FIB-SEM instrument with automated features has emerged to obtain multi-modal information in 3D using serial sectioning by applying the cross-section ion milling technique (usually Ga + ion sputtering) 52 The nature of information characterised in 3D could be the general microstructural features such as precipitates, grains, and damage such voids as well as orientation of grain and chemical mapping of elements. The imaging of the fine micro-structural features in the nano-meter scale visualised in 3D using voxel dimensions in tens of nano-meters can be characterised over typical volumes of about 1000 um 3 using FIB-SEM.…”

Section: Multi-modal and Multi-scale Characterisation Of Cavitation Imentioning

confidence: 99%

“…In contrast the serial sectioning method to generate a 3D dataset presents a challenge to obtain the slices in their original form unscathed from the sputtering process 52 . Therefore careful optimisation of sputtering parameters to minimise material damage and its maintenance of these parameters over the long times (in the range of days) are quite critical to the success of the FIB-SEM to provide high -fidelity 3D dataset.…”

Section: Multi-modal and Multi-scale Characterisation Of Cavitation Imentioning

confidence: 99%

“…The Kachanov model has been shown to predict the tertiary creep curve of low alloy ferritic steels reasonably well 97 . However the model assumes that the primary and secondary creep strains are very small, which may be true for precipitation hardened materials at low stresses 52 .…”

Section: Measures Of Estimating Creep Life In Steels : a Critical Reviewmentioning

confidence: 99%

See 2 more Smart Citations

3D creep cavitation characteristics and residual life assessment in high temperature steels: A critical review

Gupta

Toda

Mayr

et al. 2015

Materials Science and Technology

View full text Add to dashboard Cite

The paper seeks to assess critically the need for a new paradigm in creep life estimation of service exposed steels and provide possible new directions of residual life assessment, in the light of a decade of explosive application of micro-tomography on structural materials to characterise the 3D nature of cavitation damage. The phenomenon of creep failure using synchrotron micro-tomography (SR-µCT) has been studied at large synchrotron sources where imaging on conventional structural materials such as steels with high absorption to X-rays has been realized. The unique feature of the SR-µCT studies is the direct imaging in 3D of cavitation present in the bulk (hundreds of micrometers in size), revealing the spatial characteristics and morphology of the creep voids. Further the quantitative analyses of cavitation characteristics contained in the 3D datasets, which when scaled with time, stress and temperature provides functional information amenable for developing constitutive equations for creep fracture. These being based on SR-µCT, which due to its non-destructive feature provides high fidelity data that significantly reduces the ambiguity in the development of the functional relationships related to creep failure. Thus the use of such constitutive equations in an explicit manner to estimate the residual life of the components affected by creep and the consequent assessment of structural integrity would prove invaluable. This paper summarizes the studies related to creep in materials using micro-tomography with special emphasis on a 10.86%Cr heat resistant steel to show the type of data available which could be relevant for life assessment and design against creep failure. A brief discussion of the existing methods of residual life estimations in the light of the availability of the 3D micro-tomography data available in recent literature follows. Finally the possible new directions of using the microtomography data to formulate advanced residual life estimation methods are briefly touched.

show abstract

Section: Multi-modal and Multi-scale Characterisation Of Cavitation Imentioning

confidence: 99%

Section: Multi-modal and Multi-scale Characterisation Of Cavitation Imentioning

confidence: 99%

See 1 more Smart Citation

3D creep cavitation characteristics and residual life assessment in high temperature steels: A critical review

Gupta

Toda

Mayr

et al. 2015

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

Homogenization Methods and Multiscale Modeling

Zohdi

2017

Encyclopedia of Computational Mechanics Second Edition

View full text Add to dashboard Cite

The relatively recent increase in computational power available for mathematical modeling and simulation raises the possibility that modern numerical methods can play a significant role in the analysis of materials possessing heterogeneous microstructure. Ideally, in an attempt to reduce laboratory expense, one would like to make predictions of a new material's behavior by numerical simulations, with the primary goal being to accelerate the trial‐and‐error laboratory development of novel high‐performance materials. This fact, among others, has motivated the work that will be presented in this encyclopedia.

show abstract

Impact and penetration resistance of network models of coated lightweight fabric shielding

Zohdi

2014

GAMM-Mitteilungen

View full text Add to dashboard Cite

There exist a wide range of applications for lightweight ballistic fabric shields, such as the protection of critical structural components in transport systems and the human body. However, some deficiencies are (1) the susceptibility to being abruptly severed by sharp objects, which completely eliminates the fabric's ability to stretch and absorb incoming kinetic energy and (2) environmental degradation of the fabric due to moisture, heat and sunlight, which is of growing concern, since many new fabrics have multiple purposes, such as electrical and chemical sensing, in addition to being part of a protective system. Because of these issues, the coating of fabric can be advantageous, however, it adds weight to the shielding system. Experiments on this type of coated fabric system are extremely time‐consuming. Accord‐ingly, this paper seeks to develop a computational framework using a coated network model in order to capture the basic characteristics of such systems. One aspect of the model's usefulness is that it can provide qualitative information to guide and reduce costly, time‐consuming experiments. Three‐dimensional numerical examples are given to illustrate the computational model. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Computational Methods for Microstructure-Property Relationships

Cited by 51 publications

References 570 publications

3D creep cavitation characteristics and residual life assessment in high temperature steels: A critical review

3D creep cavitation characteristics and residual life assessment in high temperature steels: A critical review

Homogenization Methods and Multiscale Modeling

Impact and penetration resistance of network models of coated lightweight fabric shielding

Contact Info

Product

Resources

About