Dynamic strain aging and grain size reduction effects on the fatigue resistance of SA533B3 steels

Huang, J. Y.; Hwang, Jiun Ren; Yeh, J. J.; Chen, C.Y; Kuo, R.C.; Huang, Jiunn-Yuan

doi:10.1016/j.jnucmat.2003.09.009

Cited by 21 publications

(4 citation statements)

References 27 publications

(27 reference statements)

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“…From the graphs, it can be seen that in the DSA strain rate (1×10 -3 s -1 ), the dislocation density is significantly higher than that of other strain rates and dislocation tangles seriously. That could be accounted for the theory that the sub-grain boundary can accommodate more dislocations [11] .…”

Section: Dislocation Configurationmentioning

confidence: 99%

Effects of Strain Rate on Dynamic Strain Aging of SA508-III Steel

Yuan

Liu

Song

et al. 2014

MSF

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The dynamic strain aging (DSA) behavior of SA508-III steel was evaluated through tensile tests with different strain rates from 10-4 to 10-1s-1 at 350°C. The OM, SEM and TEM were carried out to observe the microstructures and fracture morphologies of the steel. The results show that the serrated flows appear in the stress-strain curves when the strain rate is between 10-3~10-2s-1, indicating that DSA occurs. Under the strain rate range, the tensile strength increases and the elongation and the reduction of area decrease. However, the fracture surface of the steel after tensile tests is still ductile. DSA in SA508-III steel at the strain rates from10-3 to 10-2s-1 is mainly caused by the interaction between the internal solute atoms and dislocations, which leads to the dislocations multiplication and the formation of sub-grain boundaries and dislocation cell structure.

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Section: Dislocation Configurationmentioning

confidence: 99%

Effects of Strain Rate on Dynamic Strain Aging of SA508-III Steel

Yuan

Liu

Song

et al. 2014

MSF

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“…At the strain amplitude of ±0.2 %, the steel specimens tested in air had a much longer fatigue life at 300°C than at room temperature. This could be accounted for by the occurrence of dynamic strain aging and the effect of grain size reduction at 300°C (Huang, 2003(Huang, , 2004. Lee andKang (Lee, 1995；Kang, 1992) demonstrated that dynamic strain aging would improve the low-cycle fatigue resistance and degrade the fracture toughness at 300°C for the pressure vessel steel SA508 class 3 in air.…”

Section: Low Cycle Fatigue Lifementioning

confidence: 99%

“…Recent test data indicate the initiation life is significantly decreased when the applied strain range, temperature, DO level in water, sulfur content in steel and strain rate are simultaneously satisfied (Chopra, 1997). The fatigue crack growth rates of RPV materials in simulated light water reactor (LWR) coolant environments are influenced by sulfur content, sulfide morphology (Huang, 2003, 2004Van Der Sluys, 1985Combrade, 1987 and orientation, water chemistry, loading frequency separately and synergistically (Van Der Sluys, 1985Amzallag, 1983O'Donnell, 1995Eason, 1993Roth, 2003Atkinson, 1986Shoji, 1986. The sulfur content has been reported to enhance the corrosion fatigue crack growth rates of low alloy steels (Tice, 1986).…”

Section: Introductionmentioning

confidence: 99%

Environmentally Assisted Cracking Behavior of Low Alloy Steels in Simulated BWR Coolant Conditions

Huang¹,

Yeh²,

Huang³

et al. 2011

Alloy Steel - Properties and Use

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“…Fatigue is one of the main degradation mechanisms affecting the pressure vessel integrity of pressurized water reactors (PWRs) and boiling water reactors (BWRs) [1][2][3][4][5][6]. The fatigue crack growth rates of RPV materials in simulated light water reactor (LWR) coolant environments are influenced by sulfur content, sulfide morphology [7][8][9][10][11] and orientation, water chemistry, loading frequency separately and synergistically [9,10,[12][13][14][15][16][17][18]. The sulfur content has been reported to enhance the corrosion fatigue crack growth rates of low alloy steels [19].…”

Section: Introductionmentioning

confidence: 99%