Grain boundary misorientation distributions

Randlè, Valerie; Davies, Helen; Cross, Ian

doi:10.1016/s1359-0286(00)00018-8

Cited by 27 publications

(9 citation statements)

References 35 publications

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“…As shown above, the polyphosphate lubricant successfully suppressed the shear texture and improved the drawability of IF steels after ferrite rolling. The ODFs were calculated via individual grain orientation from EBSD results in an area of 1.2 × 0.9 mm 2 from the strip cross-section under [26]. It is critical to the material's properties, particularly to the deformation behaviors.…”

Section: Microtexture Formationmentioning

confidence: 99%

The Influence of a Novel Inorganic-Polymer Lubricant on the Microstructure of Interstitial-Free Steel during Ferrite Rolling

Kong

Zhang

et al. 2020

Metals

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A novel polyphosphate lubricant was used and evaluated during hot (ferrite) rolling of an interstitial-free (IF) steel. The texture evolution of these rolled IF steels have been examined by means of X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) measurements. The polyphosphate lubricant shows an improved lubrication performance in terms of the texture optimization compared with lubricating oil and with unlubricated conditions. The γ-fiber texture is enhanced, and less shear texture is produced. This microstructure is responsible for enhanced drawability of ferrite rolled IF steels. The very high thermal stability of the polyphosphate enabled its use at very high temperatures (from 700 to 800 °C). Rolling temperature exerted limited influence on the resulting rolling texture evolution. The polyphosphate lubricant stabilizes the surface texture and reduces the gradient of shear texture through the thickness. The in-grain shear bands are reduced significantly (48.5%) compared with the unlubricated condition. Measured grain orientations indicate that the favorable texture of {111}<112> along the γ-fiber is developed while the undesired α-fiber texture of {001}<110> is effectively suppressed.

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Section: Microtexture Formationmentioning

confidence: 99%

The Influence of a Novel Inorganic-Polymer Lubricant on the Microstructure of Interstitial-Free Steel during Ferrite Rolling

Kong

Zhang

et al. 2020

Metals

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“…Scanning Electron Microscopy (SEM)/Electron Back scatter diffraction (EBSD) are an effective tool for measuring the microstructural features such as grain size, shape and distribution, crystal orientation, local misorientations (i.e. residual plastic strain) and GBCD [14][15][16][17][18].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Localized microstructural characterization of a dissimilar metal electron beam weld joint from an aerospace component

Jothi¹,

Sebald²,

Davies³

et al. 2016

Materials & Design

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Hydrogen induced cold cracking (HICC) and hydrogen embrittlement (HE) are influenced by the microstructural evolution, residual plastic strain (i.e. local misorientation), recrystallization of grains and the resultant grain boundary characteristic distribution (GBCD) brought about by welding processes. HICC and HE are known to cause failures in aerospace components and it is vitally important to quantify the microstructural evolution, degree of residual plastic strain and determine the GBCD across dissimilar weld joints in order to assess the susceptibility of the weld joint to these phenomena. In this investigation a full a microstructural characterization study was carried out at various locations within and around a dissimilar weld joint of Pulse-plated Nickel (PP-Ni) and Inconel 718 (IN718), taken from an aerospace component. Areas examined included the base metals, weld fusion zone and heat affected zones on both sides of the weld joint, formed via electron beam welding. Scanning electron microscopy (SEM) in combination with electron backscatter diffraction (EBSD) was employed to measure the residual plastic strain, grain structure, grain size distribution, crystal orientation distribution, grain boundary misorientation distribution and GBCD of the dissimilar metal weld joint. Finally a metallurgical examination was carried out using SEM on the IN718 HAZ in order to investigate the secondary phase precipitation arising from the welding process. The results shows large variety of GBCD, crystallographic orientation distribution, local plastic strain distribution and grain size, shape and structure distribution across dissimilar weld joint. And these localized microstructural characterized data sets need to be carefully transferred using data-driven approach in order to develop predictive multiscale material modelling for hydrogen induced cracking and hydrogen embrittlement.

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“…Formulating the development of misorientations, as a function of strain and temperature and in terms of microstructural processes, is therefore an important step towards improving our understanding of the role of grain boundaries in recrystallization and texture formation. The increasing volume of data from automated EBSD studies, coupled with statistical analysis, is improving our understanding of misorientation (Randle et al 2001;Wheeler et al 2001;Prior 1999;Lloyd 2000, Humphreys 2001). Fig.…”

Section: Boundary Misorientationsmentioning

confidence: 99%

Current issues and new developments in deformation mechanisms, rheology and tectonics

Meer

Drury

Bresser

et al. 2002

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Abstract:We present a selective overview of current issues and outstanding problems in the field of deformation mechanisms, rheology and tectonics. A large part of present-day research activities can be grouped into four broad themes. First, the effect of fluids on deformation is the subject of many field and laboratory studies. Fundamental aspects of grain boundary structure and the diffusive properties of fluid-filled grain contacts are currently being investigated, applying modern techniques of light photomicrography, electrical conductivity measurement and Fourier Transform Infrared (FTIR) microanalysis. Second, the interpretation of microstructures and textures is a topic of continuous attention. An improved understanding of the evolution of recrystallization microstructures, boundary misorientations and crystallographic preferred orientations has resulted from the systematic application of new, quantitative analysis and modelling techniques. Third, investigation of the theology of crust and mantle minerals remains an essential scientific goal. There is a focus on improving the accuracy of flow laws, in order to extrapolate these to nature. Aspects of strain and phase changes are now being taken into account. Fourth, crust and lithosphere tectonics form a subject of research focused on large-scale problems, where the use of analogue models has been particularly successful. However, there still exists a major lack of understanding regarding the microphysical basis of crust-and lithosphere-scale localization of deformation.

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Grain boundary misorientation distributions

Cited by 27 publications

References 35 publications

The Influence of a Novel Inorganic-Polymer Lubricant on the Microstructure of Interstitial-Free Steel during Ferrite Rolling

The Influence of a Novel Inorganic-Polymer Lubricant on the Microstructure of Interstitial-Free Steel during Ferrite Rolling

Localized microstructural characterization of a dissimilar metal electron beam weld joint from an aerospace component

Current issues and new developments in deformation mechanisms, rheology and tectonics

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