Metallurgical Phase Transformation and Behavior of Steels Under Impact Loading

Zerouki, Marzak; Ouali, Mohand Ould; Benabou, Lahouari

doi:10.1007/s11661-019-05527-z

Cited by 7 publications

(4 citation statements)

References 49 publications

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“…The aim is to formulate a rupture criterion for this material for various temperatures. Another interesting perspective to carry out is considering dynamic loadings and phase transformations [12].…”

Section: Discussionmentioning

confidence: 99%

Sensitivity of Stainless Steel Fracture to Triaxiality Factor and Lode Parameter Using Dislocation Density Approach

Rassoul,

Benabou,

Ould Ouali

2024

DFMA

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This work is devoted to the analysis of the influence of the triaxiality factor and the Lode parameter on the ductile fracture of a stainless steel tube. A micromechanical-based model incorporating several deformation mechanisms and formulated in the framework of the dislocation density theory is chosen to model the viscoplastic behavior of the 316L stainless steel. After adaptation of the implementation of the model into the finite element code Abaqus 2020 and the calibration of the model parameters with experimental available results, simulations of healthy and notched tubular specimens were carried out. In order to vary the triaxiality and Lode angle, we used specimens of different sizes and notch shapes. The results showed the capacity of the model to reproduce the experimental results of tubular structures. It was found that the strength and ductility of the specimens depend on the Triaxiality Factor and Lode Parameter.

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Section: Discussionmentioning

confidence: 99%

Sensitivity of Stainless Steel Fracture to Triaxiality Factor and Lode Parameter Using Dislocation Density Approach

Rassoul,

Benabou,

Ould Ouali

2024

DFMA

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“…This model aims to describe the behavior of materials exposed to high temperatures for long-life service. As a perspective of this work, we plan to study the influence of aging on the energy absorption capacity of the material [30][31]. Indeed, the 2017A aluminum alloy is intended for use in structures that can undergo shock loads, an analysis of the failure modes as well as the evolution of the shock absorption capacity will help to optimize the strength of the 2017A alloy.…”

Section: Discussionmentioning

confidence: 99%

Effect of artificial aging treatment on microstructure, mechanical properties and fracture behavior of 2017A alloy

2022

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The effect of artificial aging treatment on 2017A aluminum alloy microstructure, mechanical properties, and fracture behavior was investigated. The samples were taken from the as-received alloy and aged at 170 °C for 5, 10, 15, 20, and 30 hours. An optical microscope, scanning electron microscope (SEM), X-ray diffraction (XRD), microhardness and tensile strength tests were used to characterize mechanical and microstructural properties. The microstructural analysis revealed that as the aging treatment duration is increased, the size and density of precipitates grow larger and more numerous. According to X-ray diffraction measurements, the microstructural evolution caused by aging treatments is primarily due to an increase in precipitation of the hardening phase -Al2Cu. According to the tensile test results, the yield stress increases with increasing aging duration. The fracture surface analysis of failed specimens subjected to tensile loading revealed that the aging treatment conditions had a significant impact on the morphology and mode of fracture: the mixed-mode (ductile-brittle) failure was established for intermediate aging durations (aging at 170 °C for 15 and 20 h), and the intergranular fracture was found to be more pronounced when the aging duration is prolonged due to the coalescence of fine precipitates at the grain boundary.

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“…After exposure to cavitation, the austenite was transformed into martensite (the total amount of martensite was 73%, while 23% residual austenite was retained). Such structural transformations are capable of improving surface properties [33] and increasing hardness [34,35]. This contributes to increasing the performance of the deposited material before the formation of microcracks, and, consequently, increasing resistance to cavitation erosion damage [36].…”

Section: Cavitation Resistance Phase Transformation and Eroded Surfacesmentioning

confidence: 99%

Cavitation Resistance of Coatings with a Metastable Austenite Structure

Korobov

Alwan

Филиппов

et al. 2021

Thermal Spray 2021: Proceedings From the International Thermal Spray Conference

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The effect of martensitic phase transformation on cavitation erosion resistance for a deposited layer prepared from a Fe-8Cr- C-1.5Al-Ti flux-cored wire of metastable steel was studied. A reference material of AISI 316L stainless steel was used as a substrate. Cavitation tests were performed using a modified ultrasonic tester. X-ray diffraction was used to examine the phase transformation before and after cavitation tests. Also, the eroded surfaces of specimens were investigated by optical microscope (OM), scanning electron microscope (SEM), and 3D optical profilometer. The cavitation results revealed that the deposited layer exhibited a resistance to cavitation erosion approximately 10 times higher than the AISI 316L steel due to the martensitic phase transformation occurring during the cavitation process. The phase transformation plays a main role to minimize the cavitation damage of specimen. This is due to the fact that it contributes to obstructing movement of dislocations and increasing the hardness as a result of the increased hardening on the surface.

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Metallurgical Phase Transformation and Behavior of Steels Under Impact Loading

Cited by 7 publications

References 49 publications

Sensitivity of Stainless Steel Fracture to Triaxiality Factor and Lode Parameter Using Dislocation Density Approach

Sensitivity of Stainless Steel Fracture to Triaxiality Factor and Lode Parameter Using Dislocation Density Approach

Effect of artificial aging treatment on microstructure, mechanical properties and fracture behavior of 2017A alloy

Cavitation Resistance of Coatings with a Metastable Austenite Structure

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