Effect of grain size on creep properties of type 316LN stainless steel

Lee, Yo Seob; Kim, Dae Whan; Lee, Dok Yol; Ryu, Woo Seog

doi:10.1007/bf03026948

Cited by 40 publications

(26 citation statements)

References 10 publications

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“…It has been reported [20,21] that there was a reduction in high temperature strength with a decrease in grain size. The reason is considered to be that the strength of the grain boundary may be lower than that of the grains at elevated temperature.…”

Section: Discussionmentioning

confidence: 96%

Microstructure and its influence on mechanical properties of CLAM steel

Liu

Huang

Peng

et al. 2012

Fusion Engineering and Design

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Section: Discussionmentioning

confidence: 96%

Microstructure and its influence on mechanical properties of CLAM steel

Liu

Huang

Peng

et al. 2012

Fusion Engineering and Design

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“…Thus, it is postulated that the microstructures of the SS-304 were changed in the tests at 900 and 1000 • C. It is well known that the grain size of austenitic stainless steel is proportional to the heat-treatment temperature. Moreover, the strength of the stainless steel increases with the decrease of the grain size [16][17][18]. Bregliozzi et al experimentally determined that the grain size of SS-304 varied according to the annealing temperature [15].…”

Section: Creep-buckling Failure Timementioning

confidence: 99%

Creep Buckling of 304 Stainless-Steel Tubes Subjected to External Pressure for Nuclear Power Plant Applications

Okamoto

Kasahara

2019

Metals

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The creep-buckling behaviors of cylindrical stainless-steel tubes subjected to radial external pressure load at elevated temperatures—800, 900, and 1000 °C—were experimentally investigated. Prior to the creep-buckling tests, the buckling pressure was measured under each temperature condition. Then, in creep-buckling experiments, the creep-buckling failure time was measured by reducing the external pressure load for two different tube specimens—representing the first and second buckling modes—to examine the relationship between the external pressure and the creep-buckling failure time. The measured failure time ranged from <1 min to <4 h under 99–41% loading of the buckling pressure. Additionally, an empirical correlation was developed using the Larson–Miller parameter model to predict the long-term buckling time of the stainless-steel tube column according to the experimental results. Moreover, the creep-buckling processes were recorded by two high-speed cameras. Finally, the characteristics of the creep buckling under radial loading were discussed with regard to the geometrical imperfections of the tubes and the material properties of the stainless steel at the high temperatures.

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“…Creep usually happens at a temperature roughly higher than 0.4Tm, where Tm is the absolute melting temperature. 12 In this context, the alloys are expected to undergo long-term elevate temperature operation such as creep, fatigue, and oxidation. However, the Fe-Ni-Cr alloy usage has not been broadened because it was merely manufactured through casting because of its low hot workability.…”

mentioning

confidence: 99%

“…Fe-Ni-Cr alloy is designed through enhancement heat treatment parameters for hot work to escalate hot workability. 11,12 In an effort to explain the probability of additional applications as a heat-resistant material, it is crucial to comprehend the mechanical characteristic of high temperatures, which are hardness, strength, and creep performance. Specifically, it is important to analyze the creep performance in order to evaluate a service temperature endurance limit at elevated temperatures for long-term use.…”

mentioning

confidence: 99%

“…Numerous reports [12][13][14][15][16][17][18][19][20][21][22][23] prove that by increasing the grain size, the creep rate will decrease or increase based on the experiment conditions, material properties, and role of the grain boundaries. For stainless steel, Lee et al 12 prove that as the grain size increases, the steadystate creep rate decreases to a minimum value and then increases from the intermediate grain size. This is because grain boundaries react as both dislocation barriers and dislocation sources.…”

mentioning

confidence: 99%

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Relationship between the microstructure and the heat treatment and creep behavior of Fe–33Ni–19Cr alloy

Mudang

Hamzah

Bakhsheshi‐Rad

et al. 2021

Fatigue Fract Eng Mat Struct

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In the present study, the relationship between heat treatment, grain size, and the creep rupture properties of Fe-33Ni-19Cr alloy was investigated. The microstructure analysis showed that Fe-33Ni-19Cr alloy consists of the austenite phase matrix and a small number of precipitates such as titanium nitride and titanium carbides. Fe-33Ni-19Cr alloy shows an increase in steady-state creep rate with increased grain size from 94 to 381 μm, due to the grain boundary sliding mechanism. The result also exhibited that the alloy that was subjected to creep test failed in ductile mode and cavitation at the grain boundaries. The fracture surface shows a transgranular fracture but an intergranular fracture at the recrystallized grains at the fracture area. Taken together, the result exhibited that the Fe-33Ni-19Cr alloy subjected lower heat treatment temperature possess a smaller grain size, which led to better creep property along with more excellent service life during operation.A superalloy is an alloy capable of withstanding high stresses and often highly oxidizing atmosphere and high temperatures, which often reach extreme temperatures surpassing 1200 C. 1 These harsh environments caused creep to be a serious issue when the alloys are used at high temperatures. Superalloys based on iron (Fe), nickel (Ni), and cobalt (Co) can be engineered to be highly resistant to creep. 2 Thus, superalloys have arisen as an ideal material to be used in high-temperature environments. Fe-Ni-Cr alloy is a solid solution strengthening ironnickel-based heat-resistant steel. 3 They are widely used in high-temperature environments, such as steam generator tubes, nuclear power reaction tubes, gas turbines, petrochemical and refinery industries, reformer tubes, furnace components, and pyrolysis tubes. 4 The operating temperature of the modern power plant is up to 760 C, and the steam pressures are more than 35 MPa. High-temperature failure mechanism includes creep,

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Effect of grain size on creep properties of type 316LN stainless steel

Cited by 40 publications

References 10 publications

Microstructure and its influence on mechanical properties of CLAM steel

Microstructure and its influence on mechanical properties of CLAM steel

Creep Buckling of 304 Stainless-Steel Tubes Subjected to External Pressure for Nuclear Power Plant Applications

Relationship between the microstructure and the heat treatment and creep behavior of Fe–33Ni–19Cr alloy

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