The cyclic deformation and fatigue behaviour of the low carbon steel SAE 1045 in the temperature regime of dynamic strain ageing

Weisse, M.; Wamukwamba, C.K.; Christ, H.‐J.; Mughrabi, H.

doi:10.1016/0956-7151(93)90392-6

Cited by 44 publications

(10 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8. It is well known that the DSA could decrease the LCF life because of the local deformation inhomogeneity and larger stress concentration at the crack tip [16,17]. Also, showing a higher degree of DSA, the LCF life of heat BA in 310 ºC air was expected to be shorter than that of heat FP.…”

Section: Effects Of Microstructure On Lcf Behaviors Of Sa508 Gr1a Lassmentioning

confidence: 99%

Environmental Fatigue of Metallic Materials in Nuclear Power Plants – A Review of Korean Test Programs

Jang

Hong

et al. 2013

Nuclear Engineering and Technology

View full text Add to dashboard Cite

Section: Effects Of Microstructure On Lcf Behaviors Of Sa508 Gr1a Lassmentioning

confidence: 99%

Environmental Fatigue of Metallic Materials in Nuclear Power Plants – A Review of Korean Test Programs

Jang

Hong

et al. 2013

Nuclear Engineering and Technology

View full text Add to dashboard Cite

“…It has been reported that DSA resulted in a substantial reduction of fracture toughness [23,24,27] and air fatigue resistance [32][33][34] of PRV steels. However, the role of DSA in environment assisted cracking (EAC) has not yet drawn any attention.…”

Section: The Correlation Between Dsa and Eacmentioning

confidence: 99%

The Role of Dynamic Strain‐ageing in the Environment Assisted Cracking Observed in Pressure Vessel Steels

Atkinson

1997

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

The dynamic strain ageing (DSA) behaviour of A533B Class 1 reactor pressure vessel (RPV) steel, containing 5ppm of free nitrogen, has been investigated over a wide range of strain rates from 3 x lo-' to 3-10-3 s-l and temperatures from 20 to 350°C. The DSA was observed within certain temperature ranges at all strain rates tested and its hardening effect in terms of the maximum strengthening stress (up) decreased linearly with the increase of log strain rate. The temperature to stimulate DSA was observed to increase with increasing strain rate. The apparent activation energies of the characteristic strain rates for the onset, and peak of DSA have been determined, and their implications have been discussed. Compared with the available data, a positive effect of free nitrogen content on up has been evaluated. It has been found that the occurrence of susceptible environment assisted cracking (EAC) of A533B steel in high temperature water is co-related to the DSA behaviour. The results suggest that DSA reduces the ductility of RPV steel and its role in enhancing the EAC of RPV steels should not be neglected, in view of the coincidence with susceptibility zones for DSA and EAC in terms of strain rate and temperature.Keywords-Dynamic strain-ageing; Environment-assisted cracking A533B Class 1 steel; Strain rate and temperature effects. NOMENCLATURE Do = diffusion coefficient Q = apparent activation energy Q , , , = apparent activation energy of strain rate for the onset of DSA Qp = apparent activation energy of strain rate for the peak of DSA Qd = apparent activation energy of strain rate for the disappearance of DSA R = load ratio R =gas constant T = temperature up = peak strengthening stress uuTs = ultimate tensile stress (tensile strength) uo.2 = 0.2% proof (yield) strength 5, =crack tip strain rate to,, = strain rate for the onset of DSA tp =strain rate for the peak of DSA da/dN =crack growth rate RA = reduction in area t = time t = strain rate

show abstract

“…DSA is manifested as serrated flow or an instantaneous plastic flow as a fraction of pinned dislocations experience a sufficiently high stress to release from an associated solute atmosphere. It has been observed during plastic deformation in carbon steels [1,2], stainless steels [3], Ni-FeyCo based alloys [4 -8], and NiyCo-based superalloys [9 -13]. The exact details of the mechanism likely vary for different alloys and, possibly, for different temperature and strain rate regimes.…”

Section: Introductionmentioning

confidence: 99%

The influence of dynamic strain aging on fatigue and creep-fatigue characterization of nickel-base solid solution strengthened alloys

Carroll

Lloyd²,

Simpson³

et al. 2010

Materials at High Temperatures

View full text Add to dashboard Cite

The nickel-base solid solution alloys, Alloy 617 and Alloy 230, have been observed to exhibit serrated yielding or dynamic strain aging (DSA) in a temperatureystrain rate regime of interest for intermediate heat exchangers (IHX) of high temperature nuclear reactors. At 800 C, these nickel-base alloys are prone to large serrated yielding events at relatively low strains. The presence of DSA introduces challenges in characterizing the creep-fatigue and low cycle fatigue behaviour. These challenges include inability to control the target strains as a result of DSA induced strain excursions and distorted hysteresis loops. Methods to eliminate or reduce the influence of DSA on creep-fatigue testing have been investigated, including varying the strain rate, stepping to the target strain, and adjusting servo-hydraulic tuning parameters. It has not been possible to eliminate the impact of serrated flow in the temperature range of interest for these alloys without compromising the desired test protocols.

show abstract

The cyclic deformation and fatigue behaviour of the low carbon steel SAE 1045 in the temperature regime of dynamic strain ageing

Cited by 44 publications

References 4 publications

Environmental Fatigue of Metallic Materials in Nuclear Power Plants – A Review of Korean Test Programs

Environmental Fatigue of Metallic Materials in Nuclear Power Plants – A Review of Korean Test Programs

The Role of Dynamic Strain‐ageing in the Environment Assisted Cracking Observed in Pressure Vessel Steels

The influence of dynamic strain aging on fatigue and creep-fatigue characterization of nickel-base solid solution strengthened alloys

Contact Info

Product

Resources

About