Comparative Behaviour of Specialty Austenitic Stainless Steels in High Temperature Environments

Vangeli, Pascale Sotto; Ivarsson, Bo; Pettersson, Rachel

doi:10.1007/s11085-013-9368-0

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…So far, many researches of the 21Cr‐11Ni type steel which focused on the reliability assessment for the service properties, such as creep, oxidation, hot corrosion, etc. have been reported . Earlier work by the present authors found that the hot workability of the steel was closely associated with the deformation temperature which can cause the formation of DRX and moreover, that RE element yttrium could eliminate the sulfur segregation on the grain boundary which can significantly improve the hot ductility at lower temperatures.…”

Section: Introductionsupporting

confidence: 54%

“…have been reported. [3][4][5][6] Earlier work by the present authors [7] found that the hot workability of the steel was closely associated with the deformation temperature which can cause the formation of DRX and moreover, that RE element yttrium could eliminate the sulfur segregation on the grain boundary which can significantly improve the hot ductility at lower temperatures. The beneficial effect of RE on a steel which has similar compositions to the test steel was also found by Yu et al [8] However, there is still a lack of knowledge concerning the effect of the deformation parameters on the microstructural evolution, and also, the appropriate hot working window which can provide guidance for actual production of 21Cr-11Ni-N-RE heat-resistant steel is still unclear.…”

Section: Introductionmentioning

confidence: 99%

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Processing Map and Hot Deformation Characteristics of 21Cr-11Ni-N-RE Lean Austenitic Heat-Resistant Steel

Chen

Xue

et al. 2015

steel research int.

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Hot deformation behavior of 21Cr‐11Ni‐N‐RE lean austenitic heat‐resistant steel is investigated within the temperature of 1173–1473 K and the strain rate of 0.01–10 s−1. Hot deformation equation and prediction modeling of peak stress and strain are obtained. Based on the dynamic material model (DMM) theories, the processing maps are developed. The results show that at lower strain (0.3), the efficiency of power dissipation (η) increases with increasing temperature and decreasing strain rate; however at the strain of 1.0, η exhibits an obvious decrease at 1373–1473 K and 0.01 s−1, in which significant coarsening of grains is found. At large strain (1.0), the optimum hot working domain of test steel should be at 1423–1473 K and strain rate of 1–10 s−1, in which more uniform and finer microstructure is formed due to the complete dynamic recrystallization (DRX). The average grain diameter of recrystallized grains shows a power law relationship with Z. The larger the Z‐value is, the finer the grains are. Besides, the unstable hot working regions are delineated in the processing maps using Prasad instability criterion. As predicted, twinning bands of flow localization and localized kinking observed at 1173–1223 K and 1–10 s−1 should be responsible for the flow instability.

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Section: Introductionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Processing Map and Hot Deformation Characteristics of 21Cr-11Ni-N-RE Lean Austenitic Heat-Resistant Steel

Chen

Xue

et al. 2015

steel research int.

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“…In the EDS mapping results (Fig. 4), no enrichment with Si was observed at the scale-toalloy interface as reported in oxidation tests in air (no halide ions present) [21,22]. On the other hand, both steels with higher Si addition (1.8% for AISI 309 and 2.25% for AISI 314) exhibit the thinnest and most compact corrosion products observed when examining the sample cross section after the end of corrosion exposure.…”

Section: Discussionsupporting

confidence: 62%

“…The weak point of high temperature stainless steels is the development of the sigma phase at temperature changes between 600 and 900°C, which reduces the ductility and elongation of the alloy at room temperature. The development of the sigma phase can be successfully retarded by the addition of carbon and nitrogen [21]. Low silicon addition has been shown to reduce the oxidation rate of ferritic Fe-Cr and austenitic Fe-Cr-Ni steels by forming a very thin Si fayalite layer between chromium scale on the surface of the alloy and the alloy-such a Si layer provides a barrier to chromium transport from the alloy to the surface [1,6,9,[19][20][21][22][23][24] [25].…”

Section: Introductionmentioning

confidence: 99%

“…The development of the sigma phase can be successfully retarded by the addition of carbon and nitrogen [21]. Low silicon addition has been shown to reduce the oxidation rate of ferritic Fe-Cr and austenitic Fe-Cr-Ni steels by forming a very thin Si fayalite layer between chromium scale on the surface of the alloy and the alloy-such a Si layer provides a barrier to chromium transport from the alloy to the surface [1,6,9,[19][20][21][22][23][24] [25]. Buscail and others [26,27] studied the effect of molybdenum on the oxidation of stainless steel at 900°C and 1000°C and found that molybdenum affects oxidation similarly to silicon.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Cycling High Temperature Corrosion at 650°C in the Presence of NaCl of Various Austenitic Stainless Steels

Leban

Vončina

Kosec

et al. 2022

High Temperature Corrosion of mater.

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The high temperature corrosion at 650°C in the presence of NaCl at atmospheric pressure of AISI 304L, AISI 309, AISI 310S, AISI 314 and AISI 321 austenitic stainless steel was studied. The specimens were cyclically heated in the furnace and immersed in a 3.5% aqueous NaCl solution after cooling for 15 min. After each cycle, the change in mass of the samples was measured. The corroded samples were analysed by SEM /EDX, and the corrosion products were analysed by XRD. The chloride ions react with the steel surface to form porous and poorly adherent oxides and metal chlorides. After the mass increase during the first exposure cycles, spalling of the oxides occurred. The high temperature austenitic stainless steels (AISI 309, AISI 310S, AISI 314) showed less mass loss than conventional austenitic steels (AISI 304L). Surprisingly, the stainless steel AISI 321 showed a similar low weight loss after the cyclic test as AISI 309, but a detailed analysis of the exposed surfaces after the test showed a similar corrosion attack as for AISI 304. After the cyclic test at high temperature in the presence of NaCl, a higher concentration of Cr and Ni definitely improves the corrosion resistance under the present conditions, but a certain addition of Si is even more obvious. Graphical Abstract

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Metal Corrosion Screening in a Nitrogen-Based Fuel at High Temperature and Pressure

et al. 2014

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Comparative Behaviour of Specialty Austenitic Stainless Steels in High Temperature Environments

Cited by 5 publications

References 5 publications

Processing Map and Hot Deformation Characteristics of 21Cr-11Ni-N-RE Lean Austenitic Heat-Resistant Steel

Processing Map and Hot Deformation Characteristics of 21Cr-11Ni-N-RE Lean Austenitic Heat-Resistant Steel

Comparison of Cycling High Temperature Corrosion at 650°C in the Presence of NaCl of Various Austenitic Stainless Steels

Metal Corrosion Screening in a Nitrogen-Based Fuel at High Temperature and Pressure

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