Strain controlled LCF behaviour of SA-333 Gr 6 piping material in the range 298–673K

Samuel, K.G.; Ganesan, V.; Rao, K. Bhanu Sankara; Mannan, S.L.; Kushwaha, H.S.

doi:10.1016/j.ijpvp.2004.02.012

Cited by 15 publications

(16 citation statements)

References 5 publications

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“…In this later case, the second hardening due to DSA (seen by the maximum stress amplitude) is important as shown by Fig. 14. These results are in good agreement with the literature review [26,27,30].…”

Section: Strain Rate Effectsupporting

confidence: 93%

“…In this case, the fatigue life (for De t /2 = 2%) at 300°C (probable temperature of maximum DSA in tensile) is of the same order than the fatigue life at RT, and show a minimum at 150°C. On the other hand, Abdel-Raouf et al [26], Weisse et al [27] and Samuel et al [30] find a fatigue life which increases and then decreases with temperature, but the increase is at a T < T DSA , and the decrease corresponds to the T DSA . The overall results are compared on the Fig.…”

Section: Dynamic Strain Aging Effect On the Fatigue Lifementioning

confidence: 99%

“…The results of the DSA effect on LCF behavior in C-Mn and Low Alloyed steels reported in the literature are very confused and contradictory [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…Abdel Raouf [26] on a Ferrovac E iron with 0.007% C, 3 ppm N and 0.01% Al which DSA maximum peak in tensile tests occurs at 370°C reports that the stress-strain loops were very heavily serrated. Samuel et al [30] show the hysteresis loop obtained with a SA 333 gr 6 steel where the nitrogen and carbon content are respectively 0.01% and 0.14%. Neither the aluminium content is given, nor the temperature of maximum UTS.…”

Section: Introductionmentioning

confidence: 99%

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Some metallurgical aspects of Dynamic Strain Aging effect on the Low Cycle Fatigue behavior of C–Mn steels

Huang

Wagner

Bathìas

2015

International Journal of Fatigue

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a b s t r a c tCarbon-Manganese steels and associated welds are commonly used, and sometimes to sustain loads in the Low Cycle Fatigue domain. Nevertheless, the metallurgy of these C-Mn steels is rather complex, due to the interaction of solute atoms (carbon and nitrogen) with dislocations during deformation which leads to metallurgical instabilities: Lüders strain, Static Strain Aging (SSA) and Dynamic Strain Aging (DSA). The DSA phenomenon is an interaction during the test between solute atoms and dislocations which are submitted to an supplementary anchorage if the temperature is sufficient to allow the diffusion of solute atoms leading to a discontinuous plastic deformation localized in bands associated with serrations on the stress-strain curve. In C-Mn, the temperature domain where the phenomenon is present is from 150°C to 300°C. If these metallurgical instabilities induce an increase in hardness, unfortunately they produce a decrease of ductility detrimental to components safety. The results of the DSA effect on LCF behavior in C-Mn and Low Alloyed steels reported in the literature are very confused and contradictories. In this study, two C-Mn steels with a different sensitivity to DSA are investigated in the Low Cycle fatigue domain. As reported from some authors, the fatigue life seems enhance or reduce in the temperature domain where the DSA is maximum, but the decrease of the strain rate always decreases the number of cycles to failure.

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Section: Strain Rate Effectsupporting

confidence: 93%

Section: Dynamic Strain Aging Effect On the Fatigue Lifementioning

confidence: 99%

“…The results of the DSA effect on LCF behavior in C-Mn and Low Alloyed steels reported in the literature are very confused and contradictory [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Some metallurgical aspects of Dynamic Strain Aging effect on the Low Cycle Fatigue behavior of C–Mn steels

Huang

Wagner

Bathìas

2015

International Journal of Fatigue

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“…[4,11,16] As the experimental evidence became stronger that the PLC phenomenon adversely influences the service life and workability of materials, [4,[17][18][19][20] the concern for performance of structural components has led to a revival of interest in investigating the influence of plastic instabilities in steels for power plant applications. [21][22][23][24][25][26][27] Low alloy steels are used as materials for nuclear reactor pressure vessel components. Two classes of low alloy steels are predominately used for the pressure vessel application.…”

mentioning

confidence: 99%

Dynamic Strain Aging in New Generation Cr-Mo-V Steel for Reactor Pressure Vessel Applications

Gupta

Chakravartty

Banerjee

2010

Metall Mater Trans A

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A new generation nuclear reactor pressure vessel steel (CrMoV type) having compositional similarities with thick section 3Cr-Mo class of low alloy steels and adapted for nuclear applications was investigated for various manifestations of dynamic strain aging (DSA) using uniaxial tests. The steel investigated herein has undergone quenched and tempered treatment such that a tempered bainite microstructure with Cr-rich carbides was formed. The scope of the uniaxial experiments included tensile tests over a temperature range of 298 K to 873 K (25°C to 600°C) at two strain rates (10 À3 and 10 À4 s À1 ), as well as suitably designed transient strain rate change tests. The flow behavior displayed serrated flow, negative strain rate sensitivity, plateau behavior of yield, negative temperature (T), and strain rate _ e ð Þ dependence of flow stress over the temperature range of 523 K to 673 K (250°C to 400°C) and strain rate range of 5 9 10 À3 s À1 to 3 9 10 À6 s À1 , respectively. While these trends attested to the presence of DSA, a lack of work hardening and near negligible impairment of ductility point to the fact that manifestations of embrittling features of DSA were significantly enervated in the new generation pressure vessel steel. In order to provide a mechanistic understanding of these unique combinations of manifestations of DSA in the steel, a new approach for evaluation of responsible solutes from strain rate change tests was adopted. From these experiments and calculation of activation energy by application of vacancy-based models, the solutes responsible for DSA were identified as carbon/nitrogen. The lack of embrittling features of DSA in the steel was rationalized as being due to the beneficial effects arising from the presence of dynamic recovery effects, presence of alloy carbides in the tempered bainitic structure, and formation of solute clusters, all of which hinder the possibilities for strong aging of dislocations.

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Low cycle fatigue and cyclic softening behaviour of martensitic cast steel

Golański

Mroziński

2013

Engineering Failure Analysis

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Strain controlled LCF behaviour of SA-333 Gr 6 piping material in the range 298–673K

Cited by 15 publications

References 5 publications

Some metallurgical aspects of Dynamic Strain Aging effect on the Low Cycle Fatigue behavior of C–Mn steels

Some metallurgical aspects of Dynamic Strain Aging effect on the Low Cycle Fatigue behavior of C–Mn steels

Dynamic Strain Aging in New Generation Cr-Mo-V Steel for Reactor Pressure Vessel Applications

Low cycle fatigue and cyclic softening behaviour of martensitic cast steel

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