Article
Materials Science, Multidisciplinary
Vladimir Danilov, Dina Orlova, Vadim Gorbatenko, Lidiya Danilova, Lev Zuev
Summary: The Luders deformation in an aluminum-magnesium alloy was investigated at various loading rates. It was observed that the deformation always involved the propagation of deformation fronts, which moved either continuously or intermittently depending on the strain rate. The kinetics of the fronts were determined by the response of active deformable media to external mechanical action and were influenced by the autowave nature of plastic deformation.
Article
Nanoscience & Nanotechnology
Yumi Choi, Jinjin Ha, Myoung-Gyu Lee, Yannis P. Korkolis
Summary: The study investigates the kinetics of PLC bands during the hole-expansion process on a solid-solution heat-treated AA7075 aluminum sheet. Each PLC band aligns radially, spans diverse stress states, and propagates circumferentially, with nucleation frequency influenced by plastic anisotropy and proportionally to thickness strain.
SCRIPTA MATERIALIA
(2021)
Review
Materials Science, Multidisciplinary
B. S. Rowlands, C. Rae, E. Galindo-Nava
Summary: Dynamic Strain Ageing (DSA) has been widely accepted as the mechanism behind the Portevin-Le Chatelier effect in ferritic steels since its proposal in the 1940's. However, its applicability to Face-Centred Cubic (FCC) alloys, including nickel-based superalloys, is still uncertain. This review compares plastic instabilities in superalloys to those in ferritic steels and discusses outstanding issues and proposed explanations for the phenomena.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Guiying Sha, Teng Liu, Miao Yin, Yuduo Na
Summary: The study found that with increasing strain rate, the yield strength and tensile strength of Mg-4Li and Mg-4Li-1Al alloys decreased, while the elongation increased.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Nanoscience & Nanotechnology
X. X. Peng, L. Y. Wang, W. Xu, Z. Y. Liang
Summary: This study correlates plastic instabilities occurring in indentation to the PLC effect in uniaxial tension, demonstrating similar results for different strain rates and revealing the rate-dependent characteristics of plastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Jianbin Xu, Lei Liu, Odd Sture Hopperstad, Bjorn Holmedal, Tomas Manik, Knut Marthinsen
Summary: In this study, a novel method is proposed to quantitatively analyze localized deformation bands exhibiting the Portevin-Le Chatelier effect. The method introduces a multi-strain-jump function to capture the experimentally obtained strain profile. The approach allows for automatic extraction of band strain and enables the linking of band characteristics with local material properties.
SCRIPTA MATERIALIA
(2023)
Review
Metallurgy & Metallurgical Engineering
Zhang Peng, Liu Gang, Sun Jun
Summary: The plastic deformation instability, particularly the Portevin-Le Chatelier effect, has long been a significant subject of research due to its impact on industrial processes. This effect is characterized by serrations on the stress-strain curve and can lead to reduced surface quality and tensile ductility in Al alloys. Therefore, understanding the underlying mechanisms and finding ways to temper this effect by modifying the material microstructure is crucial.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Nanoscience & Nanotechnology
Risheng Pei, Sang Kyu Woo, Sangbong Yi, Talal Al-Samman
Summary: The interaction between solute atoms and matrix dislocations during plastic deformation is crucial for understanding the flow behavior of materials. In this study, Luders band formation and dynamic strain aging were investigated in a Mg-1%Mn-1%Nd (wt.%) alloy subjected to uniaxial tension at different temperatures. The microstructure of the alloy was analyzed using three dimensional atom probe tomography, and the role of solute clusters in triggering plastic instability was revealed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Chao Li, Jianwei Teng, Biaobiao Yang, Xianjue Ye, Lan Huang, Yong Liu, Yunping Li
Summary: The Portevin-Le Chatelier (PLC) effect in a powder metallurgy (PM) Co-Ni-based superalloy was systematically investigated, showing both normal and inverse PLC effects at different temperatures and strain rates, as well as strain rate sensitivities (SRS) in both positive and negative directions.
Article
Engineering, Mechanical
S. C. Ren, T. F. Morgeneyer, M. Maziere, S. Forest, G. Rousselier
Summary: The study investigates the impact of the PLC effect on plasticity and fracture of C-Mn steel, showing that at elevated temperature, the PLC effect leads to changes in crack morphology and reduces the absorbed fracture energy.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Nanoscience & Nanotechnology
Han Sun, Wen Zhang, Yakun Xu, Qi Li, Xincun Zhuang, Zhen Zhao
Summary: This study observed the evolution of Portevin-Le Chatelier (PLC) serrations in 6061-O aluminum alloy under ultra-low-frequency vibration (ULFV)-assisted tension. The distribution of stress fluctuations in the time domain and the propagation of strain-localized bands in the space domain were recorded to characterize the PLC phenomenon. The study found that the amplitude and mode of ULFV can influence the PLC effect.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Jae-Hoon Nam, Seon-Keun Oh, Myeong-heom Park, Young-Kook Lee
Summary: The study aims to clarify the mechanism of dynamic strain aging (DSA) causing serrations in Fe-5.15Mn-0.15C-0.37Si-0.0039N medium-Mn steel specimens. Tensile tests revealed that the serrations were caused by DSA in γ_R and not related to other phases. The results suggest that DSA in the medium-Mn steel can be explained by the dislocation arrest model involving long-range pipe diffusion.
Article
Nanoscience & Nanotechnology
Xingwei Huang, Xinzhe Zhou, Weizhen Wang, Chuanyong Cui, Hengqiang Ye, Zhiqing Yang
Summary: The presence of MTs increased the alloy's yield strength but changed the PLC effect type and increased serration amplitudes significantly. The interaction between dislocations and MTs created soft channels for dislocation glide, resulting in high serration amplitudes during deformation.
SCRIPTA MATERIALIA
(2022)
Article
Mechanics
N. Guillermin, J. Besson, A. Koster, L. Lacourt, M. Maziere, H. Chalons, S. Forest
Summary: High-pressure turbine disks are subjected to extreme mechanical and thermal loadings throughout their life-time. This study focuses on accurately calibrating a viscoplastic behavior model at high temperature for the nickel-based superalloy Inconel718. Experimental testing is conducted to describe the material behavior, and digital image correlation is used to measure strain carried by the PLC bands. Finite element simulations are performed to validate the models and detect instabilities due to geometrical singularities.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Tatyana Tretyakova, Mikhail Tretyakov
Summary: This study investigates the influence of loading system rigidity on the kinetics of PLC strain bands due to jerky flow in Al-Mg alloy. The original loading attachment was used to reduce stiffness and displacement and strain fields were measured using the Vic-3D non-contacting deformation measurement system. Mechanical uniaxial tension tests were conducted on Al-Mg alloy samples at various stiffness values. The results show discontinuous plastic deformations and a change in the type of jerky flow with decreasing loading system rigidity.
Article
Mechanics
Benoit Le, Nicolas Moes, Gregory Legrain
ENGINEERING FRACTURE MECHANICS
(2018)
Article
Engineering, Multidisciplinary
G. Legrain, N. Moes
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2018)
Article
Nanoscience & Nanotechnology
Baptiste Reyne, Pierre-Yves Manach, Nicolas Moes
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Mathematics, Interdisciplinary Applications
Marie Gorecki, Guillaume Peillex, Laurianne Pillon, Nicolas Moes
COMPUTATIONAL MECHANICS
(2020)
Article
Engineering, Multidisciplinary
Zoltan Csati, Nicolas Moes, Thierry J. Massart
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2020)
Article
Mathematics, Applied
T. Tiirats, N. Chevaugeon, N. Moes, C. Stolz, N. Marouf, E. Desdoit
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2020)
Editorial Material
Mechanics
L. De Lorenzis, O. Allix, M. Jirasek, N. Moes
ENGINEERING FRACTURE MECHANICS
(2021)
Correction
Materials Science, Multidisciplinary
Vasudevan Kamasamudram, Michel Coret, Nicolas Moes
INTERNATIONAL JOURNAL OF FRACTURE
(2021)
Article
Materials Science, Multidisciplinary
Vasudevan Kamasamudram, Michel Coret, Nicolas Moes
Summary: The investigation of dynamic fracture of elastomers is still considered an open area, with a focus on understanding transonic cracks and the impact of material properties on wave speeds. The experiments on Polyurethane elastomers suggest that viscoelasticity in the bulk material is crucial for describing and understanding transonic cracks, leading to the definition of the transonic regime based on rubbery wave speeds.
INTERNATIONAL JOURNAL OF FRACTURE
(2021)
Article
Engineering, Mechanical
Baptiste Reyne, Diane Herault, Sandrine Thuillier, Pierre-Yves Manach
Summary: Shear testing plays a unique role in sheet metal characterization as the principal strains change direction nonlinearly. Experimental setups often cannot reproduce theoretical conditions, but field measurement methods provide comprehensive data for assessment and improvement.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
Baptiste Reyne, Frederic Barlat
Summary: HEXAH is a framework based on the homogeneous anisotropic hardening model, aiming to recreate the plastic behavior of metals under different strain paths. It utilizes the concept of microstructure deviator, representing a set of active slip systems. By smoothly evolving from one set of activated slip systems to another, this new approach simplifies the evolution equations, reduces the number of parameters, and stabilizes behavior under cross-loading.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Astronomy & Astrophysics
Jihed Zghal, Nicolas Moes
COMPTES RENDUS PHYSIQUE
(2020)