Yazid Madi

Yazid Madi
MINES ParisTech | ParisTech · Centre des Matériaux PM FOURT (MAT)

Professor
Messiah Chairholder (ANR) : https://messiah.minesparis.psl.eu/

About

50
Publications
9,613
Reads
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484
Citations
Additional affiliations
September 2019 - present
MINES ParisTech
Position
  • Senior Researcher
September 2008 - August 2019
EPF Ecole d'ingénieurs
Position
  • Professor (Associate)

Publications

Publications (50)
Article
Full-text available
The recently developed edge tracing (ET) method allows to estimate the radial deformation in axisymmetric tensile specimens via analysis of digital images recorded during the experiments. Images are processed to detect the sample's contours and therefore estimate the minimal cross‐section diameter. This technique was mainly developed to characteriz...
Article
The present study investigated the local arrestability of intergranular crack in high-strength martensitic steel through multi-scale three-dimensional (3D) analysis using X-ray computed tomography and focused ion beam machining (FIB)-scanning electron microscopy (SEM) serial sectioning combined with electron backscattering diffraction (3D EBSD). Ma...
Preprint
Full-text available
The recently developed Edge Tracing (ET) method allows to estimate the radial deformation in axisymmetric tensile specimens via analysis of digital images recorded during the experiments. Images are processed to detect the sample’s contours and therefore, estimate the minimal cross–section diameter. This technique was mainly developed to characteri...
Preprint
Full-text available
The anisotropic material behaviour of a recrystallized AA2198 Al-Cu-Li alloy in T3 and T8 conditions was assessed by proportional loading of uniaxial-tension specimens in rolling (L), transverse (T) and diagonal (D) orientations. The width and longitudinal strains were measured to quantify plastic anisotropy. Notched-tension samples were tested in...
Article
The present study investigated the relationship between the mechanical response and microscopic crack propagation behavior of hydrogen-related intergranular fractures in high-strength martensitic steel. In contrast to cracks in the uncharged specimen, the cracks in the hydrogen-charged specimen propagated under a small crack opening displacement. C...
Conference Paper
Full-text available
Toughness properties of metallic materials are often required for all fitness-for-service analyses. The determination of these characteristics can be done either by using literature data, correlations established from other non-destructively measurable mechanical characteristics or by measuring the actual characteristics of the materials. The latt...
Article
The present study investigated the hydrogen-related fracture behavior of specimens with different stress concentration factors through microstructure observation, finite element (FE) simulation, and digital image correlation (DIC) analysis. The alloy studied was a simple model alloy (Fe-0.2C binary alloy) with fully martensite structure. When the h...
Article
Full-text available
Fracture properties of a mother plate for API grade X100 line pipe after pre-straining up to 6% are investigated using tensile notched bars and CT precracked specimens. The material has an anisotropic plastic and damage behavior due to the thermomechanical control rolling process. Experiments evidence a decrease in both ductility and toughness for...
Article
Full-text available
In this study, anisotropic ductility and associated damage mechanisms of a grade X100 line pipe steel previously studied at the macroscopic scale were investigated using in situ synchrotron radiation computed tomography of notched round bars. Line pipe materials have anisotropic mechanical properties, such as tensile strength, ductility and toughne...
Article
The relative roles of damage nucleation and growth in the oxidative embrittlement of polymers has been investigated in tension. Additive-free polyamide-6 was used, taking advantage of prior knowledge of damage mechanisms in the unaged condition. Accelerated aging was carried out on bulk and thin specimens, which were then mechanically tested to fra...
Presentation
Full-text available
Fatigue and Fracture, a symposium in memory of Paul C. Paris
Article
The present study quantitatively evaluated mechanical response of hydrogen-related fracture in the as-quenched martensitic steel and correlated it to crack propagation behavior analyzed by microstructure observations. The crack-growth resistance curves revealed that the hydrogen-related intergranular cracks propagated in a stable manner even when t...
Article
In the present article, metallic nanoparticles (NPs) used as nanogauges and electron backscattered diffraction (EBSD) are combined to investigate deformation mechanisms of the UR45 N duplex steel. The kinematic fields bring precious details in the evolution of the local deformation of austenitic and ferritic phases. The crystallographic information...
Article
The understanding of the mechanical properties at the microstructure scale is a key factor for the material macroscopic behavior comprehension and its appropriate engineering at the scale of the structure. In this study, a new approach which is based on the combination of both nanogauges displacements monitoring and electron backscatter diffraction...
Conference Paper
Full-text available
Due to external interference, pipelines used for onshore as well as offshore operations can present dent and gouge defects. As such defects can seriously impair facilities’ integrity and performance, it is necessary to evaluate the strains in the vicinity of these defects. The development of non-destructive approaches to assess defects severity rem...
Conference Paper
Full-text available
The safety of gas transportation pipelines under fatigue loading remains an important issue. The purpose of the present study is to better evaluate the fatigue crack growth (FCG) behavior by carrying out analysis/predictions and experiments in full-size pipeline steels. A full characterization was made using several samples of an X42 grade pipeline...
Article
This study aims to investigate the potential of small densely packed tilted Au nanorods grown on a flexible substrate by physical vapor deposition for strain sensing. By exciting the rods with linearly polarized white light, perpendicularly impinging onto the sample substrate, interesting plasmonic properties emerge. Electron microscopy characteriz...
Article
A two-surface, pressure-insensitive plasticity model is further developed to represent the mechanical response of hexagonal close packed metals. The model describes the 3D plastic anisotropy of a material, the tension–compression asymmetry, and the consistent evolution upon straining of both the net anisotropy and the asymmetry. The model may be vi...
Article
Full-text available
Strain-based design for offshore pipeline requires a considerable experimental work aimed to determine the material fracture toughness and the effective strain capacity of pipe and welds. Continuum damage mechanics can be used to limit the experimental effort and to perform most of the assessment analysis and evaluation at simulation level. In this...
Article
Full-text available
Strain-based design for offshore pipeline requires a considerable experimental work aimed to determine the material fracture toughness and the effective strain capacity of pipe and welds. Continuum damage mechanics can be used to limit the experimental effort and to perform most of the assessment analysis and evaluation in a simulation environment....
Article
A welded pipeline segment containing a girth weld defect is tested under combined internal pressure and bending. The test is then analyzed with respect to both overall elasto-plastic behavior and crack propagation up to failure. The analysis is carried out using the finite element method. Constitutive equations for the plastic behavior of both weld...
Article
Full-text available
In this contribution, a numerical study of the optical properties of closely-packed gold nanorods was performed. The studied nano-objects are experimentally grown on a tilted polydimethylsiloxane (PDMS) substrate by using physical vapor deposition (PVD). This method creates nanorods tilted to a certain angle with respect to the substrate normal. Th...
Conference Paper
Full-text available
In this paper, the quasi-static plastic deformation of a hot-rolled magnesium AZ31B thick plate is investigated at room temperature in both tension and compression. A macroscopic two-surface model is used to describe the complex anisotropic behavior of this material. The model accounts for plastic anisotropy as well as yielding asymmetry due to twi...
Conference Paper
Full-text available
In strain based design applications, it is necessary to demonstrate that the weld overmatches the parent metal properties to avoid strain localization at the pipeline girth weld. From an experimental point of view, it is always a challenge to accurately and consistently measure tensile properties in the weld metal area in particular in narrow-gap w...
Article
Full-text available
Fracture properties of a mother plate for API grade X100 line pipe were investigated using tensile notched bars, CT and SENB pre-cracked specimens. The material had an anisotropic plastic behaviour due to the thermo-mechanical control rolling process. In addition, anisotropic rupture properties were also observed. Specimens tested along the rolling...
Article
Full-text available
Metal-insulator-metal systems exhibit a rich underlying physics leading to a high degree of tunability of their spectral properties. We performed a systematic study on a metal-insulator-nanostructured metal system with a thin 6 nm dielectric spacer and showed how the nanoparticle sizes and excitation conditions lead to the tunability and coupling/d...
Article
Full-text available
This article exposes the beginnings of a new field which could be named as “plasmomechanics”. Plasmomechanics comes from the convergence between mechanics and plasmonics. Here we discuss a relatively recent topic whose technological aim is the development of plasmonic strain sensors. The idea is based on the ability to deduce Au nanoparticles (NPs)...
Article
Full-text available
Statistical analysis reveals that mechanical damage is the first cause of incidents on gas transmission pipelines. They can be created by third party activities such as excavator tooth impact or by interaction between the pipe and rocks. To manage the damaged pipeline safely without useless cost, there is a need to investigate the mechanical behavi...
Conference Paper
The purpose of this work was to evaluate the fracture toughness for different plastic constraint levels of a grade X63 line pipe representative of in-service line pipes in France. This study was carried out for high constraint levels using Compact Tensile (CT) specimens and low constraint levels using Single Edge Notched Tensile (SENT) specimens. M...
Article
High-strength steel line pipes have different mechanical properties (plasticity, ductility and toughness) in each direction. This anisotropy is developed by a thermo-mechanical control process (TMCP) in a heavy plate mill and a cold forming process in a pipe mill. In this study, experimental work was carried out using both as received and pre-strai...
Article
Plasticity and fracture mechanisms of a 2198 Al–Cu–Li thin sheet alloy having a thickness equal to 6 mm are investigated. Two heat treatments are studied: T351 and T851. Mechanical tests are carried out on flat specimens including smooth tensile samples and U-notched specimens. Test data are used to identify the parameters of constitutive equations...
Article
Line pipes have anisotropic mechanical properties, such as tensile strength, ductility and toughness. These properties depend on both prestrain during the cold forming process and on the anisotropy of the mother plates. In this study, a phenomenological model combining isotropic and kinematic hardening is developed to represent anisotropic hardenin...
Article
Full-text available
Assessment of structural integrity of structures often requires investigating the combination of tensile (Mode I) and shearing (Mode II) or tearing (Mode III) loadings. The purpose of the this study is to shed some light on the ductile mixed-mode fracture process and its underlying mechanics. Ductile rupture of a 2024 Al Alloy thin sheet is investi...
Article
Full-text available
The mechanical and damage behavior of a X100 steel after prestrain is studied in this work. Experimental results show both a plastic and rupture anisotropy: the T direction exhibits a higher ultimate stress but the lowest ductility and toughness. Prestrain reduces ductility and crack growth resistance. A model able to represent the plastic and dama...
Article
Full-text available
Damage and fracture mechanisms of two 2198 Al-Li thin sheet alloys having different thicknesses (2 and 6 mm) are investigated. Two heat treatments are studied: T3 and T8. Mechanical tests are carried out on flat specimens including smooth tensile samples and U-notched specimens (with various notch radii). Test data are used to identify the paramete...
Article
High strength steel line pipes often exhibit anisotropic plasticity and fracture anisotropy due to pipe cold forming. In this study, the plastic behavior of prestrained X100 steel plates was studied showing plastic anisotropy and combination of isotropic and kinematic hardening. Ductility of the steels was also tested along different loading direct...
Article
Full-text available
The plastic behavior of a X100 steel plate is studied showing plastic anisotropy and com-binaison of isotropic and kinematic hardening. Ductility and toughness of the material is tested along different loading directions using notched tensile bars and C(T) specimens. It is shown that the rolling direction (L) presents better properties than the lon...
Article
The safety assessment of welded structures and joints still remains an important industrial problem. In this study, a simple diffusion bonded bi-material joint has been made in order to analyze the plastic mismatch effect. It consists of an assembly of ferritic and austenitic steels which are representative of nuclear pressure vessel components. Te...
Article
Full-text available
This paper deals with the low-cycle fatigue (LCF) design of welded structures, the aim being the critical analysis of the rule used in the RCC-MR [Design and construction rules for mechanical components of FBR nuclear islands, AFCEN, 1993], for the design and construction of fast breeder reactors. The study takes into account the evolution of the m...
Article
To take into account the reduced fatigue strength of welded joints, a reduction life factor applied on fatigue curves (Jf value) was introduced into the RCC-MR [Design and Construction Rules for Mechanical Components of FBR Nuclear Islands, AFCEN, 1993], for the design and construction of fast breeder reactors. To better assess this factor, previou...
Article
Full-text available
To take into account the reduced fatigue strength of welded joints, a reduction factor on the fatigue curves was introduced into the RCC-MR French nuclear design and construction code. To better assess this factor, a previous work on large plates showed that the mechanical behaviour of a welded assembly is influenced by the geometry of the weld and...
Article
To take into account the reduced fatigue strength of welded joints, a reduction factor on the fatigue curves was introduced into the RCC-MR French nuclear design and construction code. To better assess this factor, a previous work on large plates showed that the mechanical behaviour of a welded assembly is influenced by the geometry of the weld and...
Conference Paper
The safety assessment of welded structures still remains an important industrial problem. In this study, a simple diffusion bonded bi-material jonction has been made in order to analyse the mismatch effect. It consists of an assembly of ferritic and austenitic steels which are representative of nuclear pressure vessel. Each material has been tested...

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Projects

Projects (3)
Project
Industrial structures for power generation and transmission are designed to have a life span of more than 40 years. Knowledge of the evolution of materials over very long periods is therefore crucial to ensure the safety and reliability of these facilities. In addition, in the context of decarbonization of energy sources, hydrogen produced by water electrolysis, for example, will play an important role. It is envisaged to collect and distribute the hydrogen produced in this way (mixed with fossil methane or biogas) by using existing networks. It is then crucial to qualify the suitability of the different sections for the transport of hydrogen gas. In order to monitor the evolution of the materials throughout the lifetime of the installations and to qualify their suitability for the transport of hydrogen, the MESSIAH Chair program proposes to use mini-tests machined from coupons extracted from the installations.