Fatigue of OFHC pure copper and 316L stainless steel subjected to prior tensile and cyclic prestrains

Marnier, G.; Keller, Clément; Taleb, Lakhdar

doi:10.1016/j.ijfatigue.2016.06.009

Cited by 18 publications

(11 citation statements)

References 42 publications

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“…Zhang and Jiang 74 have reported that oxygen‐free high conductivity (OFHC) polycrystalline copper displays cyclic hardening behavior when subjected to strain‐controlled cycling. The cyclic‐hardening feature of OFHC copper have been discussed by Lamba and Sidebottom, 77 Khan and Jackson, 78 Huang et al, 79 Hsu and Wang, 80 and Marnier et al 81 also, but for either predominantly for strain‐controlled, or for stress‐controlled conditions. The reported strain‐controlled stabilized hysteresis loops with a strain amplitude of 1% for OFHC copper 74 as shown in Figure 6A is considered here to obtain the preliminary estimates for the CIKH model parameters by following the adopted methodology.…”

Section: Resultsmentioning

confidence: 96%

Estimation of cyclic hardening/softening and ratcheting response of materials through an algorithm to optimize parameters in Chaboche's hardening rule

Nath

Barai

Ray

2022

Fatigue Fract Eng Mat Struct

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A methodology considering Chaboche's isotropic-kinematic hardening (CIKH) model and genetic algorithm optimization technique is examined here to simulate the cyclic-plastic response for materials exhibiting cyclic hardening or softening behavior. The aim of the present report is to illustrate the inherent potential of this approach by assessing the closeness of fit of the obtained predictions to the experimental results for several materials like Z2CND18.12N, and 25CDV4.11 steels, OFHC copper, and INCONEL718 alloy. The obtained results were further subjected to comparative examinations with the available predictions to demonstrate the adoptability of the suggested methodology for the cyclic hardening or softening materials. This proposed approach provides a single set of CIKH model parameters to replicate the stabilized hysteresis loops and cyclic hardening or softening behavior under symmetric strain-controlled loading, as well as ratcheting characteristics under asymmetric stresscontrolled cycling, and is thus generalized in nature.

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Section: Resultsmentioning

confidence: 96%

Estimation of cyclic hardening/softening and ratcheting response of materials through an algorithm to optimize parameters in Chaboche's hardening rule

Nath

Barai

Ray

2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

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“…The cyclic behavior (cyclic hardening or softening) of materials is directly influenced by loading cycles and stress amplitudes during fatigue loads. For the low-cycle fatigue (LCF) condition, the cyclic response of 316L stainless steel under uniaxial tension-compression (TC) loading has been extensively studied [5][6][7][8][9][10]. The material exhibits continuous cyclic hardening in a short loading cycle, followed by cyclic softening until fatigue failure occurs [7,8,10].…”

Section: Introductionmentioning

confidence: 99%

“…For the low-cycle fatigue (LCF) condition, the cyclic response of 316L stainless steel under uniaxial tension-compression (TC) loading has been extensively studied [5][6][7][8][9][10]. The material exhibits continuous cyclic hardening in a short loading cycle, followed by cyclic softening until fatigue failure occurs [7,8,10]. The effect of strain amplitude on its cyclic response lies in its hardening or softening rate, i.e., the increase or decrease rate of normal maximum stress in the LCF regime [11].…”

Section: Introductionmentioning

confidence: 99%

The Gradient Effect on Cyclic Behavior of 316L Stainless Steel in the Ultrasonic Bending Test

Hu,

Tang,

Liu

et al. 2024

Materials

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Nanoindentation measurements were conducted to investigate the high-cycle response of 316L stainless steel in bending fatigue. Hardness variation owing to the gradient flexure stress amplitude for different curvatures was plotted along with the thickness and length, respectively. Scanning electron microscopy (SEM) was subsequently conducted to explore the deformation characteristics in multiple layers, which had cyclic gradient stress, on the cross-section of specimens. The nanoindentation results indicated that the cyclic hardening response of 316L stainless steel is correlated with the level of stress amplitude in the high-cycle fatigue (HCF) regime. Furthermore, an analytical model was proposed to clarify the relationship between nanohardness and stress amplitude. Finally, the evolution of damage accumulation due to irreversible plastic deformation is continuous during stress reduction up to the neighboring zone at the neutral surface of the flexure beam in some individual grains.

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“…For example, the planar slip is easily generated by the deformation behavior of austenitic stainless steel under cyclic loadings, and is related to the loading history [6]. Some researchers found that the fatigue life of 316 L stainless steel could be shortened through the irreversibility of the dislocation structure inherited by the pre-strain and variability of strain localization during the fatigue process [7]. However, some aluminum alloys, such as 7075-T6, are likely to produce cross-slip under cyclic loadings, indicating that the deformation behavior was independent of the pre-strain [8,9], while the life-span of the aluminum alloy 6061-T6 with compressive pre-strain would decrease in virtue of slip grains and permanent slip bands caused by the increase in the plastic strain amplitude under cyclic loading [10,11].…”

Section: Introductionmentioning

confidence: 99%

An Energy-Based Method for Lifetime Assessment on High-Strength-Steel Welded Joints under Different Pre-Strain Levels

Huang

Wang

et al. 2022

Materials

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Pre-loading on engineering materials or structures may produce pre-strain, especially plastic strain, which would change the fatigue failure mechanism during their service time. In this paper, an energy-based method for fatigue life prediction on high-strength-steel welded joints under different pre-strain levels was presented. Tensile pre-strain at three pre-strain levels of 0.2%, 0.35% and 0.5% was performed on the specimens of the material Q345, and the cyclic stress and strain responses with pre-loading were compared with those without pre-loading at the same strain level. The experimental work showed that the plastic strain energy density of pre-strained welded joints was enlarged, while the elastic strain energy density of pre-strained welded joints was reduced. Then, based on the strain energy density method, a fatigue life estimation model of the high-strength-steel welded joints in consideration of pre-straining was proposed. The predicted results agreed well with the test data. Finally, the validity of the developed model was verified by the experimental data from TWIP steel Fe-18 Mn and complex-phase steel CP800.

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Fatigue of OFHC pure copper and 316L stainless steel subjected to prior tensile and cyclic prestrains

Cited by 18 publications

References 42 publications

Estimation of cyclic hardening/softening and ratcheting response of materials through an algorithm to optimize parameters in Chaboche's hardening rule

Estimation of cyclic hardening/softening and ratcheting response of materials through an algorithm to optimize parameters in Chaboche's hardening rule

The Gradient Effect on Cyclic Behavior of 316L Stainless Steel in the Ultrasonic Bending Test

An Energy-Based Method for Lifetime Assessment on High-Strength-Steel Welded Joints under Different Pre-Strain Levels

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