Mechanical properties of pre-strained austenitic stainless steel from the view of energy density

Peng, Jian; Li, Kai-Shang; Dai, Qiao

doi:10.1016/j.rinp.2018.05.034

Cited by 16 publications

(10 citation statements)

References 25 publications

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“…This effect of increasing yield with increasing pre-strain is expected and discussed in detail in the literature [ 13 , 14 ]. Peng et al illustrates that with increasing pre-strain, a corresponding increase in the value of yield stress is often observed [ 15 ]. It has been well established that the increase in yield is due to strain induced mechanical twinning and the multiplication of dislocations, with an increase in relative dislocation density being observed with increasing pre-strain [ 16 , 17 ].…”

Section: Resultsmentioning

confidence: 99%

On the effect of pre-strain and pre-fatigue on the monotonic behaviour of ultra-high strength steels

Cockings

Perkins

2020

Heliyon

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The mechanical behaviour of three ultra-high strength steels has been assessed; AerMet100, 300M and the recently developed corrosion resistant high strength steel, MLX-17. Material heat treatment profiles have been utilised to provide performance optimised for the aerospace industry and specimens have been tested to explore tensile and fatigue properties, in particular when combined with pre-strain to simulate the effects of overload. Testing of this kind has not been reported within the literature, particularly amongst ultra-high strength and corrosion-resistant steels. Baseline mechanical performance for all three materials in their heat-treated conditions has been established and properties such as yield strength and ultimate tensile strength have been assessed following a 75% and 95% pre-strain as well as fatigue in combination with a 75% and 95% pre-strain. Under all loading conditions, resultant tensile mechanical properties are not seen to witness a substantial degradation in performance, but an improvement in terms of yield strength and UTS, due to the role of work hardening. An alloy comparison has been carried out and responses are seen to vary slightly as a result of material microstructure. Correlation of pre-strain and pre-fatigue results with respect to baseline properties and microstructure has contributed to advancing the understanding of the mechanical behaviour of the aforementioned ultra-high strength steels.

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Section: Resultsmentioning

confidence: 99%

On the effect of pre-strain and pre-fatigue on the monotonic behaviour of ultra-high strength steels

Cockings

Perkins

2020

Heliyon

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“…The energy-based method uses the strain energy density as a parameter to measure fatigue damage, which is a scalar quantity and is a suitable fatigue parameter for predicting the fatigue behavior of high-strength-steel welded joints under pre-strain [27][28][29][30][31][32][33][34]. According to the literature of Chengji Mi [35], the total strain energy density for each cycle could be considered as a fatigue damage parameter for both low and high-cycle fatigue, which included the plastic strain energy density and the elastic strain energy density.…”

Section: Strain Energy Density Methodsmentioning

confidence: 99%

“…The cyclic results at different strain amplitudes are shown in Figure 7. The welded specimen with higher pre-strain had a shorter life span, and it was generally believed that the decrease in the ductility of the material caused by the tensile pre-strain lessened the resistance to low-cycle fatigue [34]. The experimental work showed that the increase in pre-strain accelerated the cyclic softening of the welded specimen.…”

Section: Effect Of Pre-strain On Fatigue Behaviormentioning

confidence: 98%

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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“…Austenitic stainless steel is widely used in petrochemical piping, heat exchanger and nuclear generator with different structures under different load conditions [36]. It is necessary to understand the plastic damage evolution under complex stress states for austenitic stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Stress Triaxiality on Plastic Damage Evolution and Failure Mode for 316L Notched Specimen

Peng

Wang

Dai

et al. 2019

Metals

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To reveal the effect of stress triaxiality on plastic damage evolution and failure mode, 316L notched specimens with different notch sizes are systematically investigated by digital image correlation (DIC) observation, plastic damage analysis by finite element simulation, and void mesoscopic observation. It was found that the plastic damage evolution and failure mode are closely related with notch radius and stress triaxiality. The greater the stress triaxiality at the root is, the greater the damage value at the root is and the earlier the fracture occurs. Moreover, void distribution by mesoscopic observation agrees well with damage distribution observed by finite element simulation with the Gurson-Tvergaard-Needleman (GTN) damage model. It is worth noting that, with the increase in stress triaxiality, the failure mode of notched specimen changes from ductility fracture with void coalescence at the center position to crack initiation at the notch root, from both mesoscopic observation and damage simulation.

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Mechanical properties of pre-strained austenitic stainless steel from the view of energy density

Cited by 16 publications

References 25 publications

On the effect of pre-strain and pre-fatigue on the monotonic behaviour of ultra-high strength steels

On the effect of pre-strain and pre-fatigue on the monotonic behaviour of ultra-high strength steels

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

Effect of Stress Triaxiality on Plastic Damage Evolution and Failure Mode for 316L Notched Specimen

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