Recrystallization and grain growth of a nano/ultrafine structured austenitic stainless steel during annealing under high hydrostatic pressure

Krawczyńska, Agnieszka; Gierlotka, S.; Suchecki, Przemysław; Setman, Daria; Adamczyk‐Cieślak, Bogusława; Lewandowska, M.; Zehetbauer, M.

doi:10.1007/s10853-018-2459-1

Cited by 16 publications

(2 citation statements)

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“…The impact of annealing under a pressure of 0.1 MPa, 2 GPa, and 6 GPa at 900 °C for 10 min on grain size and shape has been previously described and analyzed and will not be discussed in detail in this paper . The main conclusion can be drawn that the pressure retards the grain growth which was 2.0, 1.35, and 0.58 μm for annealing pressures of 0.1 MPa, 2 GPa and 6 GPa, respectively.…”

Section: Resultsmentioning

confidence: 97%

Phenomena Occurring in Nanostructured Stainless Steel 316LVM during Annealing under High Hydrostatic Pressure

et al. 2018

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The aim of the study is to demonstrate the impact of high hydrostatic pressure annealing on the grain boundary character, precipitation rate, and susceptibility to intergranular corrosion of nanostructured austenitic stainless steel 316LVM. To this end, samples of an austenitic stainless steel are deformed by high pressure torsion and subsequently annealed at 900 C for 10 min under a pressure of 2, 6 GPa and, for comparison, under atmospheric pressure. The resulting microstructures are examined using electron beam scattering diffraction, and transmission and scanning electron microscopy. It is shown that the pressure applied during annealing leads to a higher percentage of high-angle grain boundaries than does atmospheric pressure. Moreover, it promotes the coexistence of two orientations, <111> and <100>, whereas atmospheric supports mainly <111>. High pressure hinders the growth of carbides, but drastically increases their number compared with atmospheric pressure annealing. As a consequence, the highest number of Cr 23 C 6 carbides are present in the sample annealed under 6 GPa, making this sample susceptible to intergranular corrosion.

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Section: Resultsmentioning

confidence: 97%

Phenomena Occurring in Nanostructured Stainless Steel 316LVM during Annealing under High Hydrostatic Pressure

et al. 2018

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“…While Azuma et al (2012) conducted their annealing experiments at 1 atm, we performed ours at a hydrostatic pressure of 20 MPa. In many materials, including stainless steel and magnesium oxide, studies have observed that both the grain growth rate and grain-boundary diffusion coefficient decreased at higher pressures when compared to lower-pressure conditions (e.g., Farver et al, 1994;Krawczynska et al, 2018). However, ice behaves differently at high-pressure conditions compared to most oxides.…”

Section: Grain Growth Of Pure Icementioning

confidence: 99%

Grain growth of ice doped with soluble impurities

Wang,

Fan,

2024

The Cryosphere

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Abstract. The grain size of polycrystalline ice affects key parameters related to the dynamics of ice masses, such as the rheological and dielectric properties of terrestrial ice as well as the ice shells of icy satellites. To investigate the effect of soluble impurities on the grain-growth kinetics of polycrystalline ice, we conducted annealing experiments on polycrystalline ice samples doped with different concentrations of KCl (10−2, 10−3, 10−4 and 10−5 mol L−1) or MgSO4 (10−2 and 10−5 mol L−1). Samples were annealed for a maximum of 100 h at a hydrostatic confining pressure of 20 MPa (corresponding to a depth of about 2 km) and different constant temperatures of 268, 263, 258 and 253 K (corresponding to −5, −10, −15 and −20 °C, respectively). After each experiment, images of a polished sample surface were obtained using an optical microscope equipped with a cold stage. With grain boundaries detected, grains were reconstructed from the images, and an average grain size was determined for each sample. Normal grain growth occurred in all samples. Grain-size data are interpreted using the following grain-growth model: dn-d0n=kt (d: grain size; d0: starting grain size; n: grain-growth exponent; k: growth constant; t: duration). Values of the best-fit grain-growth exponent, n, for all samples range from 2.6 to 6.2, with an average value of 4.7. Pure ice exhibits 3.1 ⩽n⩽ 4.6, with an average value of 3.8. Above the eutectic point, soluble impurities enhance grain growth, as a melt phase is formed, and it could provide a fast diffusion pathway. Below the eutectic point, soluble impurities impede grain growth probably via the formation of salt hydrates that could pin the grain boundaries. Close to the eutectic point, the grain growth of doped ice is similar to pure ice. Natural ice is impure, often containing air bubbles and soluble impurities, and is usually subjected to a hydrostatic pressure. Our data set will provide new insights into the evolution of grain size within and the dynamics of natural ice masses.

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A study on recrystallization behavior and recrystallization texture of high pressure heat-treated Al–Mg alloy

Sun

Kong

et al. 2023

J Mater Sci

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Recrystallization and grain growth of a nano/ultrafine structured austenitic stainless steel during annealing under high hydrostatic pressure

Cited by 16 publications

References 45 publications

Phenomena Occurring in Nanostructured Stainless Steel 316LVM during Annealing under High Hydrostatic Pressure

Phenomena Occurring in Nanostructured Stainless Steel 316LVM during Annealing under High Hydrostatic Pressure

Grain growth of ice doped with soluble impurities

A study on recrystallization behavior and recrystallization texture of high pressure heat-treated Al–Mg alloy

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