Characterization of localized plastic deformation behaviors associated with dynamic strain aging in pipeline steels using digital image correlation

Jacobs, Taylor R.; Matlock, David K.; Findley, Kip O.

doi:10.1016/j.ijplas.2019.07.010

Cited by 32 publications

(6 citation statements)

References 37 publications

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“…3d. According to the research of Jacobs et al [31], the serrated flow on the true stress-strain curve of 0Ce steel can be divided into Type A (periodic serrations) and Type B (oscillation serrations), which contributes to the interaction between solid solution atom C and movable dislocation. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C

Zhong

Wang

Luo

et al. 2022

Materials Characterization

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Section: Resultsmentioning

confidence: 99%

Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C

Zhong

Wang

Luo

et al. 2022

Materials Characterization

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“…The carbon depletion in martensite can reduce flow stress by two mechanisms. One is that the lattice distortion caused by supersaturated carbon atoms decreases [ 50 ], and the other is the interaction of dislocation and carbon atoms by impeding screw dislocations from cross slipping and multiplying becomes weak [ 49 , 51 ]. In general, the increase in carbon/chromium content in matrix reduces the impact toughness by increasing flow stress.…”

Section: Discussionmentioning

confidence: 99%

Effects of Austenitizing Temperature on Tensile and Impact Properties of a Martensitic Stainless Steel Containing Metastable Retained Austenite

et al. 2021

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Austenitizing temperature is one decisive factor for the mechanical properties of medium carbon martensitic stainless steels (MCMSSs). In the present work, the effects of austenitizing temperature (1000, 1020, 1040 and 1060 °C) on the microstructure and mechanical properties of MCMSSs containing metastable retained austenite (RA) were investigated by means of electron microscopy, X-ray diffraction (XRD), as well as tensile and impact toughness tests. Results suggest that the microstructure including an area fraction of undissolved M23C6, carbon and chromium content in matrix, prior austenite grain size (PAGS), fraction and composition of RA in studied MCMSSs varies with employed austenitizing temperature. By optimizing austenitizing temperature (1060 °C for 40 min) and tempering (250 °C for 30 min) heat treatments, the MCMSS demonstrates excellent mechanical properties with the ultimate tensile strength of 1740 ± 8 MPa, a yield strength of 1237 ± 19 MPa, total elongation (ductility) of 10.3 ± 0.7% and impact toughness of 94.6 ± 8.0 Jcm−2 at room temperature. The increased ductility of alloys is mainly attributed to the RA with a suitable stability via a transformation-induced plasticity (TRIP) effect, and a matrix containing reduced carbon and chromium content. However, the impact toughness of MCMSSs largely depends on M23C6 carbides.

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“…The deformed grains establish the PLC band and subsequently affect the adjacent undeformed grains, causing non-uniform levels of strain aging. The difference may cause the formation of a small notch, which may become the nucleation point for the next PLC band [41]. When DSA is present, the material exhausts its plasticity sooner than without the presence of DSA.…”

Section: Identification Of Dsamentioning

confidence: 99%

On the Potential Correlation between Dynamic Strain Aging and Liquid Metal Embrittlement in T91/LBE System

Fitriani,

Claeys,

Gavrilov

et al. 2023

Metals

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In the study of the liquid metal embrittlement (LME) of the T91/lead-bismuth eutectic (LBE) system, it is observed that LME occurs in a temperature interval which is similar to the temperature range where dynamic strain aging (DSA) is observed. However, the potential correlation between DSA and LME has not yet been satisfactorily investigated. This investigation for the T91/LBE system is exactly the topic of this work. For the evaluation of DSA and LME, slow strain rate tensile tests are conducted in the temperature range between 200 °C and 450 °C with strain rates of 5×10−5 s−1 and 5×10−6 s−1 in reference and a molten oxygen-depleted LBE environment. The resulting tensile properties, as well as the fracture surfaces and lateral surfaces of the failed samples, suggest a correlation between DSA and LME in the T91/LBE system. The maximum mechanical degradation of T91 is observed in the case where the effects of both DSA and LME on material properties are found to be at maximum. However, the observation of DSA was not identified as a prerequisite for LME to take place. Therefore, these results may indicate that DSA partly contributes to the ductility minimum observed in the T91/LBE system. In addition, the results of this work show that changes in the fracture surface and lateral surface are more sensitive features to claim for the potential occurrence of LME than the changes in total elongation.

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Characterization of localized plastic deformation behaviors associated with dynamic strain aging in pipeline steels using digital image correlation

Cited by 32 publications

References 37 publications

Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C

Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C

Effects of Austenitizing Temperature on Tensile and Impact Properties of a Martensitic Stainless Steel Containing Metastable Retained Austenite

On the Potential Correlation between Dynamic Strain Aging and Liquid Metal Embrittlement in T91/LBE System

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