Dynamic Deformation of Metastable Austenitic Stainless Steels at the Nanometric Length Scale

Roa, J.J.; Sapezanskaia, Ina; Fargas, Gemma; Kouitat, R.; Redjaïmia, A.; Mateo, A.

doi:10.1007/s11661-018-4911-x

Cited by 5 publications

(3 citation statements)

References 44 publications

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“…Laplanche et al suggested the occurrence of twin formation and phase transformation in NiTi alloys [ 220 ]. The phase-transformation-induced plasticity (TRIP) effect is expected to be a novel idea for obtaining a better performance in strength–ductility balance in steel, and many studies have approached this behavior by indentation [ 222 , 223 , 224 , 225 , 226 , 227 , 228 , 229 ]. Lu et al analyzed the indentation-induced mechanical behavior of retained austenite in a bearing steel [ 222 ].…”

Section: Other Mechanisms Of the Eventmentioning

confidence: 99%

Pop-In Phenomenon as a Fundamental Plasticity Probed by Nanoindentation Technique

Ohmura

Wakeda

2021

Materials

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The attractive strain burst phenomenon, so-called “pop-in”, during indentation-induced deformation at a very small scale is discussed as a fundamental deformation behavior in various materials. The nanoindentation technique can probe a mechanical response to a very low applied load, and the behavior can be mechanically and physically analyzed. The pop-in phenomenon can be understood as incipient plasticity under an indentation load, and dislocation nucleation at a small volume is a major mechanism for the event. Experimental and computational studies of the pop-in phenomenon are reviewed in terms of pioneering discovery, experimental clarification, physical modeling in the thermally activated process, crystal plasticity, effects of pre-existing lattice defects including dislocations, in-solution alloying elements, and grain boundaries, as well as atomistic modeling in computational simulation. The related non-dislocation behaviors are also discussed in a shear transformation zone in bulk metallic glass materials and phase transformation in semiconductors and metals. A future perspective from both engineering and scientific views is finally provided for further interpretation of the mechanical behaviors of materials.

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Section: Other Mechanisms Of the Eventmentioning

confidence: 99%

Pop-In Phenomenon as a Fundamental Plasticity Probed by Nanoindentation Technique

Ohmura

Wakeda

2021

Materials

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“…En etapas posteriores, el aumento de la densidad de dislocaciones puede presentarse en granos orientados con deslizamiento múltiple, en la formación de arreglos subestructurales como canales y estructuras celulares. Roa et al [3] encontraron que la transformación martensítica ocurre en aceros austeníticos metaestables bajo carga cíclica en amplitudes de tensión/deformaciones significativamente más bajas que el valor límite requerido en caso de carga monotónica.…”

Section: Introductionunclassified

Fatigue behavior evaluation in Fe-20Mn-3Al-0.9C alloys by dynamic nanoindetation

Castañeda Villalba,

Rodriguez Pulecio,

Coronado Marin

2023

ing. Solidar

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The fatigue response by applying cyclic loads on individual grains using monotonic and cyclic nanoindetation to analyze the effect on load or displacement control in an austenitic Fe-20Mn-3Al-09C alloy were analyzed. The material response to the cycles considering the load control and the displacement control to properties such as hardness, elastic's modulus, and contact stiffness, was studied by analyzing the load-unload curves (P-h). The material softening Analysis showed that these properties decrease with increasing cycles due to the activation of deformation mechanisms. The elasticity's Modulus and hardness values for monotonic loads in load control presented values close to those reported in the literature. On the other hand, in displacement control, the values were lower. In load and displacement control mode, the first two cycles presented no overlap between unloading and loading between cycles, due to large irreversible plastic deformation and low elastic recovery after unloading. In the subsequent cycles, overlaps between the hysteresis curves were predominant, due to the activation of the deformation mechanisms.

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“…Following these ideas, an extensive program comprised of different nanoindentation experiments was developed by the authors in order to deform metastable steel samples in a controlled way. Thus, the dynamic deformation was examined by means of cyclic nanoindentation, concluding that metastable stainless steels present an inelastic nature of the unloading/reloading response which is mainly related to the ratcheting effect [14]. The influence of testing mode on the fatigue behavior was also studied, and the results showed that nanoindentation under loading control mode could be compared to conventional low-cycle fatigue tests, whereas the experiments performed under displacement control mode may be associated with high-cycle fatigue tests [15].…”

Section: Introductionmentioning

confidence: 99%

Transmission of Plasticity Through Grain Boundaries in a Metastable Austenitic Stainless Steel

Mateo

Sapezanskaia

Roa

et al. 2019

Metals

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Austenitic metastable stainless steels have outstanding mechanical properties. Their mechanical behavior comes from the combination of different deformation mechanisms, including phase transformation. The present work aims to investigate the main deformation mechanisms through the grain boundary under monotonic and cyclic tests at the micro- and sub-micrometric length scales by using the nanoindentation technique. Within this context, this topic is relevant as damage evolution at grain boundaries is controlled by slip transfer, and the slip band-grain boundary intersections are preferred crack nucleation sites. Furthermore, in the case of metastable stainless steels, the interaction between martensitic phase and grain boundaries may have important consequences.

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Dynamic Deformation of Metastable Austenitic Stainless Steels at the Nanometric Length Scale

Cited by 5 publications

References 44 publications

Pop-In Phenomenon as a Fundamental Plasticity Probed by Nanoindentation Technique

Pop-In Phenomenon as a Fundamental Plasticity Probed by Nanoindentation Technique

Fatigue behavior evaluation in Fe-20Mn-3Al-0.9C alloys by dynamic nanoindetation

Transmission of Plasticity Through Grain Boundaries in a Metastable Austenitic Stainless Steel

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