Estimates of Creep-Fatigue Interaction in Irradiated and Unirradiated Austenitic Stainless Steels

Brinkman, C.R.; Korth, G.E.; Hobbins, R.R.

doi:10.13182/nt72-a31195

Cited by 63 publications

(10 citation statements)

References 2 publications

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“…Here for an ageing treatment of 1000 h at 650°C the life in a 1 h dwell test is reduced by a factor of only 1 5 , compared to a reduction factor of 5.6 for solution-annealed material. Brinkman et al [3] note that the fracture paths for hold-period tests of 1 h on aged specimens were intergranular, and suggest that the extended creepfatigue life of aged specimens is related to the restriction of grain-boundary sliding or void coalescence by discontinuous precipitates. This parallels observations for the 10 h dwell test on material 58 at 625"C, and emphasises the role of precipitation in creep-fatigue failure noted by Lloyd and Wareing [16].…”

Section: And (3) For Different Values Of (A-p)mentioning

confidence: 99%

Creep‐fatigue Behaviour of Four Casts of Type 316 Stainless Steel

Wareing

1981

Fatigue Fract Eng Mat Struct

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Low-cycle fatigue tests including hold periods up to 24 h at maximum tensile strain have been conducted on four casts of Type 316 stainless steel in the temperature range 570 to 625°C. These resulted in failure times up to 4000 h. In general, fatigue life is reduced as the hold period increases, but the extent of life reduction varies from material to material and with test temperature. For two casts material this initial life reduction is followed by an increase in life as hold periods are extended. The results are rationalised in terms of prevailing fracture processes, and the implication for the extrapolation of short-term data is discussed.

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Section: And (3) For Different Values Of (A-p)mentioning

confidence: 99%

Creep‐fatigue Behaviour of Four Casts of Type 316 Stainless Steel

Wareing

1981

Fatigue Fract Eng Mat Struct

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“…The creep-buckling failure time for each tube column was obtained using Equation (4) and the curve fit. Equations (5) and (6) give the empirical correlations for predicting the creep-buckling failure time at a given temperature and external pressure for Tube 1-03 and Tube 3-03, respectively. According to the empirical correlations (Equations (5) and (6)), the creep-buckling failure time was estimated for the two tube columns at 800, 900, and 1000 • C with the variation of the external pressure and was compared with the experimental measurements in Figure 12.…”

Section: Empirical Correlation: Lmpmentioning

confidence: 99%

“…Brinkman et al investigated the effects of irradiation on the creep-fatigue properties of type 316 stainless steel at 593 • C (1100 • F). They found that aging is beneficial in improving the creep-fatigue properties [5]. Wareing developed a crack-propagation model to estimate the fatigue life at an elevated temperature between 538 and 760 • C and determined that creep damage influences the growth rate of surface fatigue cracks [6].…”

Section: Introductionmentioning

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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“…The imposition of one form of damage is also known to influence the other. When the two damage components act in a combined manner, a creep-fatigue interaction develops [1,2,3]. The basic reason for the creep-fatigue effect can best be understood by detailed consideration of the stress-strain pattern involved during cycling with a tensile hold period.…”

Section: Introductionmentioning

confidence: 99%

An effective method to investigate short crack growth behaviour by reverse bending testing

Gao

Brown

Miller

et al. 2007

International Journal of Fatigue

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A reverse bending rig has the advantage of relatively cheap construction compared with servo-controlled machines, and its robustness and reliability make it ideally suited to long-term testing programmes. In this paper, the details of the mechanical mechanism of a bending rig, the methods of its strain measurement and stress-strain analysis have been presented. A series of tests has been carried out to investigate short crack growth behaviour of AISI type 316 stainless steel under creep-fatigue conditions at 550 o . The advantage of this type of test allows a comparison to be made, on one specimen, of the influence of both tensile and compressive hold periods on crack growth behaviour. It has been shown that predominantly intergranular long cracks form on the tensile side and transgranular short cracks on the compressive side and these are a prominent feature between 0.9 -2.5% strain range. C

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Estimates of Creep-Fatigue Interaction in Irradiated and Unirradiated Austenitic Stainless Steels

Cited by 63 publications

References 2 publications

Creep‐fatigue Behaviour of Four Casts of Type 316 Stainless Steel

Creep‐fatigue Behaviour of Four Casts of Type 316 Stainless Steel

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

An effective method to investigate short crack growth behaviour by reverse bending testing

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