Effect of thermal aging on the low cycle fatigue behavior of Z3CN20.09M cast duplex stainless steel

Chen, Weifeng; Xue, Fei; Tian, Yingying; Yu, Dunji; Wang, Yu; Xu, Cheng

doi:10.1016/j.msea.2015.08.070

Cited by 32 publications

(6 citation statements)

References 27 publications

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“…Some materials such as 304LN steel and Z3CN20.09M cast duplex stainless steel display a combination of both hardening and softening. 21,26 Figure 7(a) and (b) presents the selected stress–strain hysteresis loops for 2 nd , 50 th , 100 th and 150 th cycles recorded during asymmetric cyclic loading of as-received and artificially aged samples, respectively. In these tests, 79% of the maximum load (UTS) is applied to obtain the cyclic stress–strain hysteresis loops.…”

Section: Resultsmentioning

confidence: 99%

Effect of ratcheting fatigue damage on the evolution of tensile properties of Al–Mg alloy

Kumar

Das

Singh

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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This work aims to investigate the effect of damage accumulation on the evolution of tensile properties due to prior ratcheting fatigue in as-received and artificially aged conditions of Al–Mg alloy (AA 5754). Uniaxial asymmetric stress controlled tests for various combinations of mean stress and stress amplitude are performed at room temperature. Progressive degradation in the mechanical properties of structures and machines subjected to cyclic loading during service period can affect the structural integrity. In view of this, ratcheting fatigue tests are interrupted at various life fractions for particular mean stress and stress amplitude followed by tensile tests to understand the damage evolution during ratcheting for both conditions of alloy. Also, the effect of mean stress and stress amplitude on the post ratcheting tensile behaviour is analysed by conducting the ratcheting tests up to 150 cycles. Cyclic hardening is exhibited in the initial cycles followed by saturation for both as-received and artificially aged alloy. Ratcheting strain increases with the increase in both mean stress and stress amplitude. Drastic changes in tensile properties are noticed with ratcheting fatigue damage evolution for both conditions of alloy. The evolution of tensile properties due to prior loading history such as ratcheting fatigue can provide fundamental understanding in the design of structural components.

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Section: Resultsmentioning

confidence: 99%

Effect of ratcheting fatigue damage on the evolution of tensile properties of Al–Mg alloy

Kumar

Das

Singh

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Cleavage and flat-like features are also observed on the surface marking the brittle zone that might be due to the inclusion of particles. These defects, when observed in front of a crack-tip, a driving force is experienced by the crack facilitating further propagation of the crack and increasing the crack growth rate (da/dN) in proportion to  K (Chen et al, 2015). The micrograph shows some secondary cracks deeper beneath the fatigue striations, acting in a ductile fashion.…”

Section: Fractographic Investigationmentioning

confidence: 98%

Joint-design effect on the metallurgical and mechanical behavior of duplex stainless steel welds

Dhiman¹,

Singhal²,

Saxena³

2022

Int. J. Eng. Sci. Tech

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In the present investigation, the influence of joint design on the microstructure and the mechanical properties of SAF 2205 duplex stainless steel welds are reported. Plates with two different joint designs were welded using the gas tungsten arc welding process. To investigate the sole effect of joint design, the joints were designed in such a way that both joints have similar groove volumes. The weldments were investigated for microstructural characterization, ferrite content, and microhardness study; later, they were subjected to Charpy V-notch impact test, transverse tensile test, and fatigue testing in order to investigate the mechanical performance. Both the weld joints were able to achieve 100% joint efficiency in view of the transverse tensile test. Different weld joint configurations demonstrated the influence of the differential heat dissipation characteristics of the joints, evident from different morphological features revealed through optical microscopy of the weldment. The welding affected the ferrite(α)-austenite(γ) ratio of the weld metals and differed the welds in terms of ferrite content in the root and weld pass. The weld zone of the U-joint showed a 65.8% ferrite fraction and thus showed 18% more hardness as compared to the V-joint, while the V-joint had the highest yield stress of 617 MPa. The study revealed that the U-joint performed better in comparison to the V-joint in terms of microhardness, impact toughness, and fatigue behavior. The U-joint could resist around 15% more fatigue cycles than the V-joint under high cycle fatigue.

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“…Chen et al reported that the low cycle fatigue (LCF) life of CDSS was prolonged at all strain amplitudes as thermal aging duration increases up to 6000 h at 400 • C [21]. However, Llanes et al considered that the effects of thermal aging on the cyclic deformation mechanisms of a duplex stainless steel were strongly related to the plastic strain amplitude [22].…”

Section: Introductionmentioning

confidence: 99%

Effects of Thermal Aging on the Low Cycle Fatigue Behaviors of Cast Duplex Stainless Steels

Wang

2019

Metals

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The low cycle fatigue (LCF) behaviors of cast duplex stainless steel (CDSS) thermally aged at different times were investigated under different strain amplitudes. The effects of thermal aging on the LCF lives of CDSS are closely related to the strain amplitude. At a low strain amplitude, the fatigue life of the material increases significantly after thermal aging, while the LCF life decreases with an increasing aging time at a high strain amplitude. After thermal aging at 400 °C for 10,000 h, the fatigue fracture morphologies of CDSS change from fatigue fringes to mixture features including fatigue fringes in austenite and cleavage cracks in ferrite. Severe plastic deformation in ferrite of the aged CDSS under a high strain amplitude causes the cleavage cracking of ferrite. The premature failure of ferrite accelerates the propagation of fatigue crack and shortens the fatigue life at a high strain amplitude.

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Effect of thermal aging on the low cycle fatigue behavior of Z3CN20.09M cast duplex stainless steel

Cited by 32 publications

References 27 publications

Effect of ratcheting fatigue damage on the evolution of tensile properties of Al–Mg alloy

Effect of ratcheting fatigue damage on the evolution of tensile properties of Al–Mg alloy

Joint-design effect on the metallurgical and mechanical behavior of duplex stainless steel welds

Effects of Thermal Aging on the Low Cycle Fatigue Behaviors of Cast Duplex Stainless Steels

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