Ratcheting and low cycle fatigue behavior of SA333 steel and their life prediction

Paul, Surajit Kumar; Sivaprasad, S.; Dhar, S.; Tarafder, S.

doi:10.1016/j.jnucmat.2010.03.014

Cited by 140 publications

(95 citation statements)

References 41 publications

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“…It may be mentioned here that similar kinds of results are also reported by Lim et al (2009), Park et al (2007 and Paul et al (2010) for a copper alloy, Inconel 718 and plain carbon piping steel, respectively.…”

Section: Ratcheting Behavioursupporting

confidence: 87%

“…In predicting the effect of ratcheting damage on material's fatigue life, a considerable amount of attention has been directed in defining a suitable empirical damage parameter to obtain the best correlation between the damage parameter and the life to failure. In some popular stress-based models, stress amplitude was taken as the damage parameter (Lim et al, 2009;Park et al, 2007;Paul et al, 2010). The effect of ratcheting on fatigue life has not received separate attention, perhaps because it can be regarded as a mean stress effect with plasticity in the fatigue model (Lim et al, 2009).…”

Section: Prediction Of Ratcheting Life By Mean Stress Modelsmentioning

confidence: 99%

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Fatigue life estimation in presence of ratcheting phenomenon for AISI 304LN stainless steel tested under uniaxial cyclic loading

Mishra

Dutta

Ray

2015

International Journal of Damage Mechanics

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This investigation aims to describe the experimental ratcheting life of AISI 304LN stainless steel with a proposed model. A series of stress-controlled low cycle fatigue experiments have been carried out at room temperature under uniaxial loading on the steel up to failure of specimens, under three sets of stress amplitude and mean stress values. Comparison of the theoretically predicted results with the experimental ones is found to be reasonably satisfactory in the fatigue life range of 10 2 -10 5 cycles. Additionally the proposed stress-based model for predicting ratcheting fatigue life has been critically discussed with reference to some previous models.

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Section: Ratcheting Behavioursupporting

confidence: 87%

Section: Prediction Of Ratcheting Life By Mean Stress Modelsmentioning

confidence: 99%

Fatigue life estimation in presence of ratcheting phenomenon for AISI 304LN stainless steel tested under uniaxial cyclic loading

Mishra

Dutta

Ray

2015

International Journal of Damage Mechanics

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“…Ratcheting strain rate (_ e e) is defined as the difference in ratcheting strain (e r ) between two successive cycles [8,17]. For example, if the ratcheting strain in first cycle is e 1 and in second cycle is e 2 , then _ e e ¼ e 2 À e 1 (strain increment per unit cycle).…”

Section: Effect Of Mean Stress On Ratcheting Strain Ratementioning

confidence: 99%

“…Studies have also been carried out on austenitic stainless steels [9 -19], especially 304SS [13 -16]. Although the effect of mean stress (s m ) and stress amplitude (s a ) on ratcheting behaviour have been studied on austenitic stainless steel [8,14,17], more studies are needed to fully understand the underlying material behaviour during ratcheting deformation, especially in the DSA regime for which a very limited literature is available [18,19]. Since DSA regime encompasses the operating temperature of SFRs (~820 K), it is essential to investigate the manifestations of DSA in ratcheting.…”

Section: Introductionmentioning

confidence: 99%

Effect of mean stress and stress amplitude on the ratcheting behaviour of 316LN stainless steel under dynamic strain aging regime

Sarkar¹,

Nagesha²,

Sandhya³

et al. 2012

Materials at High Temperatures

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The influence of dynamic strain aging (DSA) on the ratcheting behaviour of 316LN stainless steel was investigated at 823 K as a function of mean stress (s m ) and stress amplitude (s a ). Test results obtained under different combinations of s m À s a were analysed in order to arrive at a map delineating different deformation regimes viz. ratcheting, strain burst and elastic shakedown. It was shown that the synergistic effect of s m and s a can be described by the ratio of mean stress and stress amplitude (s m ys a ). A critical value of this ratio was identified to mark the transition between ratcheting and elastic shakedown and the same was used to predict deformation behaviour of the material in DSA under asymmetrical loading.

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“…6 This reduction in ratcheting rate continues till the steady state rate of ratcheting strain accumulation takes place. 2,6 During last stage, ratcheting process is typified as ratcheting strain rate increases uncontrollably in successive cycles resulting in the cross-sectional area reduction. 2,6 During last stage, ratcheting process is typified as ratcheting strain rate increases uncontrollably in successive cycles resulting in the cross-sectional area reduction.…”

Section: Introductionmentioning

confidence: 99%

Ratcheting assessment of materials based on the modified Armstrong–Frederick hardening rule at various uniaxial stress levels

Ahmadzadeh

Varvani‐Farahani

2013

Fatigue Fract Eng Mat Struct

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The present study evaluates ratcheting response of materials by means of the Armstrong–Frederick (A–F) hardening rule, the modified A–F rule (Bower's model), and further modifications of the hardening rule based on new introduced coefficients. The implemented modifications on the A–F‐based hardening rule aims to address stages of ratcheting over stress cycles. The modified hardening rule predicts the ratcheting strain rate decay over stage I and the constant rate of strain accumulation during stage II. The modified hardening rule consisted of the coefficients of the hardening rule controlling stress–strain hysteresis loops generated over stress cycles during ratcheting process (Bower's modification on A–F rule) plus the coefficients controlling rates over stages of materials ratcheting deformation. Stress–strain‐dependent coefficients in the modified rule are responsible to compromise overprediction of ratcheting of A–F during stage I and the premature plastic shakedown beyond stage I induced by Bower's model. Ratcheting strain rate coefficients improved the hardening rule capability to calibrate and control the rate of ratcheting in stages I and II and enabled the modified hardening rule to predict ratcheting strain over a prolonged domain of stress cycles. The modified hardening rule was employed to assess ratcheting response of 304, 42CrMo, 316L steel and copper samples under uniaxial loading conditions. The predicted ratcheting values based on the modified hardening rule and the experimental ratcheting strains were found in good agreements.

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Ratcheting and low cycle fatigue behavior of SA333 steel and their life prediction

Cited by 140 publications

References 41 publications

Fatigue life estimation in presence of ratcheting phenomenon for AISI 304LN stainless steel tested under uniaxial cyclic loading

Fatigue life estimation in presence of ratcheting phenomenon for AISI 304LN stainless steel tested under uniaxial cyclic loading

Effect of mean stress and stress amplitude on the ratcheting behaviour of 316LN stainless steel under dynamic strain aging regime

Ratcheting assessment of materials based on the modified Armstrong–Frederick hardening rule at various uniaxial stress levels

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