scholarly journals Extension of Creep Rupture Life by Sintering of Grain Boundary Cavities in 316 Stainless Steel.

1994 ◽  
Vol 43 (489) ◽  
pp. 652-658 ◽  
Author(s):  
Masaharu MURATA ◽  
Hideo TANAKA ◽  
Norio SHINYA
Keyword(s):  
Stainless Steel ◽  
Grain Boundary ◽  
Rupture Life ◽  
Creep Rupture ◽  
316 Stainless Steel

scholarly journals Short-Term Creep-Rupture Behaviour of AISI 310S Austenitic Stainless Steel Sheets Manufactured in Salem Steel Plant, a Special Steels Unit of Steel Authority of India Limited, Ministry of Steel, Government of India

YMER Digital ◽  
2021 ◽  
Vol 20 (12) ◽  
pp. 363-373
Author(s):  
A Kanni Raj ◽  
Keyword(s):  
Stainless Steel ◽  
Grain Boundary ◽  
Creep Behavior ◽  
Rupture Life ◽  
Stress Rupture ◽  
Constant Load ◽  
Creep Rupture ◽  
Steel Plant ◽  
Tensile Creep ◽  
Metallographic Examination

The creep behavior of AISI 310S stainless steel taken from SAIL’s Salem stainless steel plant has been investigated by constant load tensile creep test at the temperatures of 973, 1023, and 1073 K and loads of 66.6, 74.8, 86.6, and 94.8 MPa. It exhibits steadystate creep behavior in most test conditions. The double logarithm plot of rupture life and applied stress yielded straight lines at all the three test temperatures indicating that power-law creep due to dislocation climb is the operating mechanism of creep deformation. Linear relationship was obtained for plots of logarithm of rupture life against inverse temperature obeying Arrhenius type of temperature dependence with activation energy of 340 kJ/mol. The stress-rupture data yielded a master curve of Larson-Miller parameter. The plot of Monkman-Grant relationship is typical indicating that rupture is controlled by growth of grain boundary cavities. The metallographic examination of crept samples revealed formation of grain boundary voids and cracks leading to intergranular creep fracture. Deformation twins and carbide precipitates were also observed. Creep-rupture properties are compared with that of AISI 600 ironbased superalloy to analyze quantitatively its behavior

Radiation-Induced Segregation in 316 and 304 Stainless Steels Irradiated at Low Dose Rate

2000 ◽  
Vol 650 ◽  
Author(s):  
T. R. Allen ◽  
J. I. Cole ◽  
J. Ohta ◽  
K. Dohi ◽  
H. Kusanagi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Grain Boundary ◽  
Dose Rate ◽  
Stainless Steels ◽  
Low Dose ◽  
Bulk Composition ◽  
304 Stainless Steel ◽  
316 Stainless Steel ◽  
Low Dose Rate ◽  
Radiation Induced

ABSTRACTAs part of the shutdown of the EBR-II reactor, structural materials were retrieved to analyze the effects of long-term irradiation on mechanical properties and microstructure. In this work, the effect of low dose rate irradiation (10−7 to 10−8 dpa/s) on grain boundary composition in 316 and 304 stainless steels was analyzed. Samples were taken from surveillance specimens and subassemblies irradiated in the reflector region of EBR-II at temperatures from 371-390°C to maximum doses of 30 dpa. The effects of dose, dose rate, and bulk composition on radiation- induced segregation are analyzed. In 316 stainless steel, changes in grain boundary chromium and nickel concentrations occur faster than changes in iron and molybdenum concentrations. In 304 stainless steel, decreasing the dose rate increases the amount of grain boundary segregation. For a dose of 20 dpa, chromium depletion and nickel enrichment are greater in 304 stainless steel than in 316 stainless steel, the difference most likely due to dose rate. In both 304 and 316 stainless steels, the presence of a grain boundary precipitate significantly changes the composition of the adjacent grain boundary.

Assessment of an Improved Multiaxial Strength Theory Based on Creep-Rupture Data for Type 316 Stainless Steel

1993 ◽  
Vol 115 (2) ◽  
pp. 177-184 ◽  
Author(s):  
R. L. Huddleston
Keyword(s):  
Stainless Steel ◽  
Stress Tensor ◽  
Rupture Life ◽  
Deviatoric Stress ◽  
Biaxial Stress ◽  
304 Stainless Steel ◽  
Strength Theory ◽  
Stress Rupture Life ◽  
316 Stainless Steel ◽  
Stress States

A new multiaxial strength theory incorporating three independent stress parameters was developed and reported by the author in 1984. It was formally incorporated into ASME Code Case N47-29 in 1990. In the earlier paper, the new model was shown to provide significantly more accurate stress-rupture life predictions than the classical theories of von Mises, Tresca, and Rankine, for type 304 stainless steel tested at 593°C under different biaxial stress states. Further assessments for other alloys are showing similar results. The current paper provides additional results for type 316 stainless steel specimens tested at 600°C under tension-tension and tension-compression stress states and shows 2–3 orders of magnitude reduction in the scatter in predicted versus observed lives. A key feature of the new theory, which incorporates the maximum deviatoric stress, the first invariant of the stress tensor, and the second invariant of the deviatoric stress tensor, is its ability to distinguish between life under tensile versus compressive stress states.

scholarly journals Effects of Carbon Content and Chromium Segregation on Creep Rupture Properties of Low Carbon and Medium Nitrogen Type 316 Stainless Steel

1997 ◽  
Vol 83 (5) ◽  
pp. 317-322 ◽  
Author(s):  
Takanori NAKAZAWA ◽  
Nobuhiro FUJITA ◽  
Hidetaka KIMURA ◽  
Hajime KOMATSU ◽  
Hiroyuki KOTOH ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Carbon Content ◽  
Creep Rupture ◽  
Low Carbon ◽  
316 Stainless Steel ◽  
Rupture Properties
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