A comparative assessment of fatigue deformation behavior of 316 LN SS at ambient and high temperature

Goyal, Sunil; Mandal, Sumantra; Parameswaran, P.; Sandhya, R.; Athreya, C.N.; Laha, K.

doi:10.1016/j.msea.2017.04.102

Cited by 40 publications

(21 citation statements)

References 42 publications

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“…2, serrated flow occurred during LCF of the investigated CoCrFeMnNi HEA. This phenomenon has been widely reported for quasistatic deformation in various alloys [19,21,31,36,[54][55][56][57],…”

Section: Serrated Flowsupporting

confidence: 59%

“…Similar initial hardening behavior has also been reported before for other materials, see for example Refs. [31][32][33][34][35]. Various distinct dislocation structures such as pile-ups, planar slip bands, dislocation loops and entanglements including cell structures were observed upon cycling (see Fig.…”

Section: Microstructural Evolution and Mechanical Responsementioning

confidence: 99%

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High-temperature low cycle fatigue behavior of an equiatomic CoCrFeMnNi high-entropy alloy

Chauhan

Litvinov

et al. 2020

Materials Science and Engineering: A

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In the present work, low cycle fatigue (LCF) behavior of an equiatomic CoCrFeMnNi high entropy alloy (HEA) is correlated to the microstructural evolution at 550 °C. The fully reversed strain-controlled fatigue tests were conducted in air under strain amplitudes ranging from 0.2 to 0.8%. The measured cyclic stress response showed three distinct stages which include initial cyclic hardening followed by a quasi-stable cyclic response until failure. The rate and amount of cyclic hardening increased with the increase in strain amplitude. In comparison to common austenitic stainless steels, CoCrFeMnNi HEA shows comparable strength and improved LCF lifetimes at similar testing conditions. Electron-microscopy investigations after failure reveal no noticeable change in grain size, texture and annealing twins density. Initial cyclic hardening is attributed to dislocation multiplication and dislocation-dislocation as well as dislocationsolute atom interaction. The quasi-stable cyclic response is associated with the equilibrium between dislocation multiplication and annihilation, which also leads to the formation of heterogeneous dislocation structures such as ill-defined walls and cells, particularly at higher strain amplitudes. Besides this, the material exhibits serrated plastic-flow due to interactions between mobile dislocations and diffusing solute 2 atoms (such as Cr, Mn and Ni). Lastly, segregation in the form of Cr-and NiMn-enriched phases were observed near grain boundaries, which appears to have a detrimental effect on the fatigue life.

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Section: Serrated Flowsupporting

confidence: 59%

Section: Microstructural Evolution and Mechanical Responsementioning

confidence: 99%

High-temperature low cycle fatigue behavior of an equiatomic CoCrFeMnNi high-entropy alloy

Chauhan

Litvinov

et al. 2020

Materials Science and Engineering: A

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“…This master curve is similar to that of the modified 9Cr-1Mo steel under LCF at RT [4]. It is worth noting that this master curve is different from other materials, the ascending branches transfer to left and down direction in Q960E steel, while ascending branches transfer to the opposite directions in other steels, for example, a 304LN austenitic stainless steel and SA333 Gr.6 C-Mn steel [26] and 316 LN stainless steel [25]. The Masing and cyclic hardening-softening behavior of a material is believed to be related with its initial microstructure [15] and loading conditions, such as strain amplitude and temperature.…”

Section: Masing and Non-masing Behaviorsupporting

confidence: 63%

“…The Masing and cyclic hardening-softening behavior of a material is believed to be related with its initial microstructure [15] and loading conditions, such as strain amplitude and temperature. The master curve for Q960E steel being different from other materials [25,26], may be resulted from different microstructures.…”

Section: Masing and Non-masing Behaviormentioning

confidence: 95%

“…4 Comparison between tensile stress-strain curve and cyclic stress-strain curve from Half-life hysteresis loops at a range of total strain amplitude between ± 0.5% and ± 1.2% Fig. 5 a Cyclic stress-strain curve obtained by connecting the tips of half-life hysteresis loops; b construction of master curve obtained by enveloping the upper branches of hysteresis loops non-Masing behavior depending on the microstructure and the experimental loading conditions, especially strain amplitude [25].…”

Section: Masing and Non-masing Behaviormentioning

confidence: 99%

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Masing Behavior and Microstructural Change of Quenched and Tempered High-Strength Steel Under Low Cycle Fatigue

Bai

Zhou

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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Low cycle fatigue behavior of a quenched and tempered high-strength steel (Q960E) was studied in the strain amplitude ranging from ± 0.5% to ± 1.2% at room temperature. As a result of fatigue loading, the dislocation structural evolution and fracture mechanism were examined and studied by transmission electron microscopy and scanning electron microscopy (SEM). The results showed that this Q960E steel showed cyclic softening at different strain amplitudes, and the softening tendency was more apparent at strain amplitude of ± (0.6-1.2)% than that at ± 0.5%. The reduction in dislocation density with increasing strain amplitude is responsible for the softening tendency of cyclic stress with the strain amplitude. The material illustrates near-Masing behavior at strain amplitude ranging from ± 0.6% to ± 1.2%. The near-Masing behavior of Q960E high-strength steel can be the result of stability of martensite lath at different strain amplitudes. Partial transformation from martensite laths to dislocation cells is responsible for the derivation from ideal Masing behavior. In the SEM examination of fracture surfaces, transgranular cracks initiate on the sample surface. Striations can be found during the crack propagation stage.

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Quantitative Assessment and Analysis of Non-Masing Behavior of Materials under Fatigue

Yadav

Roy

Veerababu

et al. 2021

J. of Materi Eng and Perform

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A comparative assessment of fatigue deformation behavior of 316 LN SS at ambient and high temperature

Cited by 40 publications

References 42 publications

High-temperature low cycle fatigue behavior of an equiatomic CoCrFeMnNi high-entropy alloy

High-temperature low cycle fatigue behavior of an equiatomic CoCrFeMnNi high-entropy alloy

Masing Behavior and Microstructural Change of Quenched and Tempered High-Strength Steel Under Low Cycle Fatigue

Quantitative Assessment and Analysis of Non-Masing Behavior of Materials under Fatigue

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