Effect of Dynamic Strain Aging on Fracture Resistance of Carbon Steels Operating at Light-Water Reactor Temperatures

Marschall, C.W.; Landow, M.; Wilkowski, G.

doi:10.1520/stp19003s

Cited by 18 publications

(10 citation statements)

References 12 publications

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“…The presence of the elements chromium (Cr) and molybdenum (Mo) results in the formation and presence of the second-phase particles chromium carbide (Cr 2 C 3 ) and molybdenum carbide (Mo 2 C), which are well dispersed through the microstructure. The carbide particles distributed through the microstructure contribute in a positive way to enhancing strength of the steel matrix (Ref [36][37][38][39][40]. However, the presence and distribution of an observable or substantial number of such carbide particles in the microstructure is detrimental to both ductility and fracture toughness.…”

Section: Methodsmentioning

confidence: 99%

Influence of Cyclic Straining on Fatigue, Deformation, and Fracture Behavior of High-Strength Alloy Steel

Manigandan

Srivatsan

Vasudevan

et al. 2015

J. of Materi Eng and Perform

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In this paper, the results of a study on microstructural influences on mechanical behavior of the highstrength alloy steel TenaxÔ 310 are presented and discussed. Under the influence of fully reversed strain cycling, the stress response of this alloy steel revealed softening from the onset of deformation. Cyclic strain resistance exhibited a linear trend for the variation of both elastic strain amplitude with reversals-to-failure, and plastic strain amplitude with reversals-to-failure. Fracture morphology was essentially the same at the macroscopic level over the entire range of cyclic strain amplitudes examined. However, at the fine microscopic level, this high-strength alloy steel revealed fracture to be mixed-mode with features reminiscent of ''locally'' ductile and brittle mechanisms. The macroscopic mechanisms governing stress response at the fine microscopic level, resultant fatigue life, and final fracture behavior are presented and discussed in light of the mutually interactive influences of intrinsic microstructural effects, deformation characteristics of the microstructural constituents during fully reversed strain cycling, cyclic strain amplitude, and resultant response stress.

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Section: Methodsmentioning

confidence: 99%

Influence of Cyclic Straining on Fatigue, Deformation, and Fracture Behavior of High-Strength Alloy Steel

Manigandan

Srivatsan

Vasudevan

et al. 2015

J. of Materi Eng and Perform

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“…The increased workhardening rate and increased tensile strength are believed to arise from greater than normal dislocation densities in steels that exhibit DSA. These high dislocation densities are believed to occur because of the pinning, which requires that fresh dislocations be formed continually to maintain the applied strain rate 13 . Fig.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Heat Treatment on Dynamic Strain Aging Behaviour of AISI H10 Hot Work Tool Steel

Taştemür

Gündüz

2017

Mat. Res.

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Dynamic strain aging (DSA) behaviour of hot work tool steel (H10) was investigated under asreceived (AR) and as-quenched (AQ) conditions. Hot tensile test was carried out in the temperatures of 25°C-700°C at a strain rate of 1x10 -3 s -1 . The tensile properties indicated that AQ samples showed an increase in yield strength (YS) and ultimate tensile strength (UTS) but a decrease in elongation at 200°C or 300°C consistent with DSA. However, AR samples revealed a decrease in YS and UTS for the same testing temperatures. This indicated the presence of less amount of free C or N in solution of AR samples. Further increase in the testing temperature has increased the elongation. It is believed that DSA occurs in H10 tool steel at different temperatures because of interaction between dislocations and interstitial solute atoms (C or N) or substitutional atoms (Cr or Mo).

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“…According to its greater solubility limit, nitrogen seems to exert a more pronounced influence on aging than carbon does [1,5,24,25]. The localization of these atoms is rather complex [9,10].…”

Section: Methodsmentioning

confidence: 99%

“…Due to its greater solubility limit, nitrogen seems to exert a more pronounced influence on strain aging than carbon does [1,5,24,25].…”

Section: Introductionmentioning

confidence: 99%

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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Effect of Dynamic Strain Aging on Fracture Resistance of Carbon Steels Operating at Light-Water Reactor Temperatures

Cited by 18 publications

References 12 publications

Influence of Cyclic Straining on Fatigue, Deformation, and Fracture Behavior of High-Strength Alloy Steel

Influence of Cyclic Straining on Fatigue, Deformation, and Fracture Behavior of High-Strength Alloy Steel

The Effect of Heat Treatment on Dynamic Strain Aging Behaviour of AISI H10 Hot Work Tool Steel

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

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