Effect of cold working deformation on the internal friction of 2.25Cr–1Mo steel

Liu, Xinbao; Shiwa, Mitsuharu; Sawada, Kota; Yamawaki, Hisashi; Watanabe, Makoto; Yin, Fuxing

doi:10.1016/j.msea.2010.07.015

Cited by 7 publications

(2 citation statements)

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“…(6), if the unloading rate increases during the unloading stage, the effective stress will fall faster correspondingly, and the anelastic reverse slip displacement is less within a shorter time of unloading and causing more back stress being remained. Also, according to previous work, 49 the less internal friction measured by dynamic mechanical Analysis (DMA) was observed on 2.25Cr-1Mo steel in the case of higher frequency, hence the friction coefficient f would reduce with the increase of unloading rate and cause the high resulted anelastic slip rate corresponding to the valley stress.…”

Section: Anelastic Recovery Strain Of Unloading Stageε An Unmentioning

confidence: 65%

Cyclic creep behaviour and strain classification of a bainite 2.25Cr-1Mo steel at 455oC

Jiang

Ogunmola

Zhao

et al. 2020

Preprint

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Uniaxial static and cyclic creep tests are carried out on a bainite 2.25Cr-1Mo steel at 455°C. The dependence of cyclic response on varied unloading conditions is investigated, with unloading rates from 0.6 MPa/s to 39 MPa/s and the valley stress duration from 0 to 30 min. Fracture surfaces of each specimen are analysed by using a scanning electron microscopy, and a systematic classification of strain components under cyclic creep is proposed to determine the actual damage. The results indicate that, the fracture modes under static and cyclic creep conditions both have ductile features. Due to the effect of anelastic strain recovery, the strain accumulation rate under cyclic creep is significantly retarded as compared with static creep, and the unloading conditions apparently influence the behaviour of anelastic strain recovery. Moreover, a life prediction method for cyclic creep tests based on mean actual strain deducted recovery strain is proposed.

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Section: Anelastic Recovery Strain Of Unloading Stageε An Unmentioning

confidence: 65%

Cyclic creep behaviour and strain classification of a bainite 2.25Cr-1Mo steel at 455oC

Jiang

Ogunmola

Zhao

et al. 2020

Preprint

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“…To characterize the internal friction peak in cold deformed A316L stainless steel, the specimens with prior tensile strain 5% or 20% were used by Ivanchenko et al [2]. Liu et al explored the effects of cold working deformation on the internal friction of the 2.25Cr-1Mo steel [3]. The prior deformation was performed also on tensile loading and results show that the internal friction of the steel increases with the magnitude of cold working deformation.…”

Section: Introductionmentioning

confidence: 99%

304L stainless steel fatigue evaluation using dynamic mechanical analysis

Rao

Shen

2018

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In order to evaluate the fatigue effects on 304L Stainless Steel, the internal friction or damping of the material have been investigated by means of dynamic mechanical analysis (DMA), using single cantilever test modes. Before DMA measurement, the 304L plates are loaded with different cycle number and stress amplitude to simulate different fatigue condition. The amplitude dependant internal friction (ADIF) of 304L small sample is measured. It shows that the ADIF curves of DMA are associated with the pre-fatigue loading. One ADIF peak is observed near the critical strain amplitude. The DMA data of different pre-stressed samples (cyclic stress amplitude from ±80MPa to ±200MPa) show that the height of ADIF peak increases with the pre stress value. The mechanism of the peak is discussed in the paper. The results indicate that a clear correlation exists between fatigue condition and internal friction curve, so that the fatigue behaviour of 304L stainless steel can be evaluated from DMA measurements.

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