Microstructural Characterization of Materials

Brandon, David; Kaplan, Wayne D.

doi:10.1002/9780470727133

Cited by 169 publications

(105 citation statements)

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“…These obtained lattice parameters were plotted against the function cos(2 ) /sin ( ), and the beast value with least error is obtained by extrapolating the data to 2 = [45]. This method is plotted in Fig.…”

Section: Uniaxial Tensile Testmentioning

confidence: 99%

Material characterisation and finite element modelling of cyclic plasticity behaviour for 304 stainless steel using a crystal plasticity model

Sun

Becker

2016

International Journal of Mechanical Sciences

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. Abstract: Low cycle fatigue tests were carried out for a 304 stainless steel at room temperature. A series of experimental characterisations, including SEM, TEM, and XRD were conducted on for the 304 stainless steel to facilitate the understanding of the mechanical responses and microstructural behaviour of the material under cyclic loading including nanostructure, crystal structure and the fractured surface. The crystal plasticity finite element method (CPFEM) is a powerful tool for studying the microstructure influence on the cyclic plasticity behaviour. This method was incorporated into the commercially available software ABAQUS by coding a UMAT user subroutine. Based on the results of fatigue tests and material characterisation, the full set of material constants for the crystal plasticity model was determined. The CPFEM framework used in this paper can be used to predict the crack initiation sites based on the local accumulated plastic deformation and local plastic dissipation energy criterion, but with limitation in predicting the crack initiation caused by precipitates.

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Section: Uniaxial Tensile Testmentioning

confidence: 99%

Material characterisation and finite element modelling of cyclic plasticity behaviour for 304 stainless steel using a crystal plasticity model

Sun

Becker

2016

International Journal of Mechanical Sciences

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“…This is dependent on atomic number, Z, but is often quoted as being up to 5 µm [17]. Improved spatial resolution can be achieved by preparing very thin specimens (∼150 nm) for analysis inside a 195 transmission electron microscope (TEM).…”

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confidence: 99%

Environmentally assisted fatigue crack nucleation in Ti–6Al–2Sn–4Zr–6Mo

et al. 2015

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An unexplained feature was observed at the fatigue crack origin of a number of α/β titanium specimens tested at 450• C in the low cycle fatigue regime. The origin was discoloured blue but this was not a result of temper colouration; this feature sometimes resulted in large reductions in fatigue lives. A number of specimens were examined to determine the cause and formation mechanism of these "blue spots." This feature was associated with elevated oxygen and chloride levels and the presence of sodium. A mechanism based on hot-salt stress-corrosion cracking is proposed and the implications for service components are discussed.

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“…However, only a rough guideline can be provided as to which methods can be applied to assess a specific microstructural feature, which may not be exhaustive. For a detailed description of the operating modes of the different methods the reader is referred to literature [7,[16][17][18][19][20][21][22][23] and to specific chapters of this book.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

“…In addition, the most important methods for microstructural characterization on a nanometer and micrometer scale will be outlined in this chapter with emphasis on analytical electron microscopy. At the end of the chapter, a selection of textbooks and journal articles is listed, which might be helpful for the reader to deepen his/her understanding of the microstructure and properties of engineering materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] as well as of methods used for microstructural characterization [7,[16][17][18][19][20][21][22][23]]. or more chemical species.…”

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confidence: 99%