Effect of processing parameters on the evolution of dislocation density and sub-grain size of a 12%Cr heat resistant steel during creep at 650°C

Rojas, D.; García, J.; Prat, O.; Agudo, L.; Carrasco, Claudia; Sauthoff, Gerhard; Kaysser-Pyzalla, Anke R.

doi:10.1016/j.msea.2010.10.028

Cited by 52 publications

(20 citation statements)

References 19 publications

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“…At this time, the deformation can increase the nucleation rate of cementite by strain- induced precipitation and the holding process will provide adequate time for cementite to precipitate. [23][24][25] This result was also confirmed by thermomechanical processing of experiment of steel sheets such that a large number of nanoscale cementites precipitated in lath bainite after plastic deformation and holding process.…”

supporting

confidence: 60%

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Wang

et al. 2015

Metall Mater Trans A

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We describe here the electron microscopy and mechanical property studies that were conducted in an industrially processed 20-and 40-mm C-Mn thick plates that involved a new approach of ultrafast cooling (UFC) together with significant reduction in Mn-content of the steel by~0.3 to 0.5 pct, in relation to the conventional C-Mn steels, with the aim of cost-effectiveness. The study demonstrated that nanoscale cementite precipitation occurred during austenite transformation in the matrix of heavy plate during UFC, providing significant precipitation strengthening. With decrease in UFC stop temperature and consequent increase in the degree of undercooling, there was a transition in the morphology of cementite from lamellar to irregular-shaped nanoscale particles in the 20 mm heavy plate. With the increase in plate thickness, nanoscale cementite precipitated in bainitic lath at the surface of 40 mm heavy plate, which significantly increased the strength and decreased the elongation. Simultaneously, microstructural evolution in hot-rolled sheets was studied via simulation experiments using laboratory rolling mill to define the limits of microstructural evolution that can obtained in the UFC process and develop an understanding of the evolved microstructure in terms of process parameters.

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supporting

confidence: 60%

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Wang

et al. 2015

Metall Mater Trans A

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“…Traditionally there are some methods such as Xray diffraction (XRD) [38][39][40][41], transmission electron microscopy (TEM) [42,43], electron backscatter diffraction (EBSD) [44,45], electron channeling contrast imaging [46], and hydrogen diffusivities [47]. Recently, the dislocation density has been estimated from hardness measurement [48,49].…”

Section: Resultsmentioning

confidence: 99%

Production of nanograin microstructure in steel nanocomposite

Jamaati

Toroghinejad

Amirkhanlou

et al. 2015

Materials Science and Engineering: A

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“…As such, an interest in the application of STEM using BF, annular bright field (ABF), or annular dark field (ADF) to image dislocation networks in unirradiated materials has grown. [81][82][83][84][85][86][87][88][89] The reason for such interest is that STEM significantly reduces the elastic contrast in the background by smearing out thickness-dependent contrast, it can be performed on thicker samples, and the traditional gÁb invisibility criterion can remain applicable. As discussed in previous sections, the imaging in STEM and CTEM is equivalent due to reciprocity when imaging conditions in both modes are carefully selected.…”

Section: Dislocation Loop Imagingmentioning

confidence: 99%

Application of STEM characterization for investigating radiation effects in BCC Fe-based alloys

Parish

Field

Certain³

et al. 2015

J. Mater. Res.

110

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This paper provides an overview of advanced scanning transmission electron microscopy (STEM) techniques used for characterization of irradiated BCC Fe-based alloys. Advanced STEM methods provide the high-resolution imaging and chemical analysis necessary to understand the irradiation response of BCC Fe-based alloys. The use of STEM with energy dispersive x-ray spectroscopy (EDX) for measurement of radiation-induced segregation (RIS) is described, with an illustrated example of RIS in proton-and self-ion irradiated T91. Aberration-corrected STEM-EDX for nanocluster/nanoparticle imaging and chemical analysis is also discussed, and examples are provided from ion-irradiated oxide dispersion strengthened (ODS) alloys. Finally, STEM techniques for void, cavity, and dislocation loop imaging are described, with examples from various BCC Fe-based alloys.

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Effect of processing parameters on the evolution of dislocation density and sub-grain size of a 12%Cr heat resistant steel during creep at 650°C

Cited by 52 publications

References 19 publications

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Production of nanograin microstructure in steel nanocomposite

Application of STEM characterization for investigating radiation effects in BCC Fe-based alloys

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