Microstructure evolution during cyclic tests on EUROFER 97 at room temperature. TEM observation and modelling

Giordana, M.F.; Giroux, Pierre-François; Alvarez‐Armas, I.; Sauzay, Maxime; Armas, A.F.; Kruml, Tomáš

doi:10.1016/j.msea.2012.04.038

Cited by 53 publications

(27 citation statements)

References 35 publications

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“…The results are also obtained on similar materials . After the rapid decrease of stress at the beginning, all the curves show a relatively slow softening behavior before the final failure and they are consistent at different strain amplitudes except for the 0.4% curve. The 0.4% curve bends up before failure, and it agrees with the results reported by Nishimura et al It is reported that the increase of peak stress near the final failure is attributed to the fatigue crack initiates at the edge of the extensometer.…”

Section: Resultssupporting

confidence: 90%

Experimental and numerical investigation of low‐cycle fatigue behavior of 9Cr ferritic‐martensitic steel at room temperature

Zhang

et al. 2020

Mat Design & Process Comms

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The low‐cycle fatigue (LCF) behavior of 9Cr ferritic‐martensitic steel has been investigated over a range of controlled total strain amplitudes from 0.25 to 0.8% at room temperature (RT). The LCF properties of P92 steel at RT follow Coffin‐Manson relationship. Cyclic stress response of the P92 steel at RT contains three stages, in which the rapid softening and saturation part of cyclic softening stage can be described by the nonlinear isotropic/kinematic hardening model, and the softening rate and strength are enhanced with the increase of strain amplitudes. The influence of strain amplitude on the fatigue crack growth has been studied by using a scanning electron microscope, and it shows that the number of fatigue sources and secondary cracks increase with the increase of strain amplitudes.

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Section: Resultssupporting

confidence: 90%

Experimental and numerical investigation of low‐cycle fatigue behavior of 9Cr ferritic‐martensitic steel at room temperature

Zhang

et al. 2020

Mat Design & Process Comms

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“…The movement of subgrain boundaries could be prevented by M 23 C 6 carbides (Fig.2b), and the dislocation density in cells was low (Fig.3a) [17] .…”

Section: Dislocation Arrangement and Precipitate Distributionmentioning

confidence: 99%

Microstructure evolution in CLAM steel under low cycle fatigue

Hu¹,

Huang²,

Yan³

et al. 2014

Materials Science and Engineering: A

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“…A fatigue life of approximately 17 000 cycles was recorded during fatigue tests with ε ac = ±0.2%, when the elastic and plastic strain components were 0.15% and 0.05%, respectively. The structural changes at such cyclic conditions are associated with the Bauschinger effect, 13,21,22) when decreasing the flow stress at the following cycles is attributed to the spilling of dislocation boundaries into separate dislocations 13) or to the reverse motion of the dislocations with respect to the lath boundary, followed by their annihilation. 16,21) The mutually compensated misorien- tations across the martensite blocks that were revealed by the structural observations ( Figs.…”

Section: Discussionmentioning

confidence: 99%

“…16) The annihilation processes result in decreasing the amount of lath boundary misorientation. When the boundary misorientation decreases to a threshold value of the pinning pressure exerted by second phase particles 19,21) the dislocation boundary starts to migrate or break into separate dislocations. This coalescence and trapping of mobile dislocations at separate, highly misoriented LABs leads to increase in the misorientation during cyclic loading.…”

Section: Discussionmentioning

confidence: 99%