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article

Study of the effect of the silver content on the structural and mechanical behavior of Ag–ZrCN coatings for orthopedic prostheses

I. Ferreri, V. Lopes, S. Calderon V., C.J. Tavares, more

Materials Science & Engineering C > 2014 > 42 > Complete > 782-790

With the increase of elderly population and health problems that are arising nowadays, hip joint prostheses are being widely used. However, it is estimated that 20% of hip replacement surgeries simply fails after few years, mainly due to wear fatigue.Bearing this in mind, this work reports on the development of new coatings that are able to sustain long and innocuous life inside the patient, which...

article

Calorimetric features of release of plastic deformation induced internal stresses, and approach to equilibrium state on annealing of crystals and glasses

G.P. Johari, G.P. Johari

Thermochimica Acta > 2014 > 581 > Complete > 14-25

Plastic deformation of crystals and glasses produces internal strains (stresses), which change their energy and other thermodynamic properties. On annealing, these stresses decrease at a rate faster than the structure relaxes toward the equilibrium state. Mechanism of such relaxations in crystals differs from that in glasses and it also differs for glasses of different types. In all cases, the energy...

article

A unified internal state variable material model for inelastic deformation and microstructure evolution in SS304

R. Liu, M. Salahshoor, S.N. Melkote, T. Marusich, more

Materials Science & Engineering A > 2014 > 594 > Complete > 352-363

At a fundamental level, the thermomechanical response of metals during inelastic deformation is governed by dislocation mechanics and associated microstructure evolution. However, the most commonly used material models in severe plastic deformation processes such as metal machining and forming are phenomenological (e.g. Johnson–Cook) or semi-phenomenological (e.g. Zerilli–Armstrong) and do not account...

article

Investigation of the stress-strain state of seamless pipe in the initial state

Małachowski, Jerzy, Hutsaylyuk, Volodymyr, Yukhumets, Petr, Dmitryenko, Roman, more

Archive of Mechanical Engineering > 2014 > 61 > 4

article

An evaluation of mechanical properties of YBaCuO and (Sm,Gd)BaCuO bulk superconductors using Vickers hardness test at cryogenic temperatures

Y. Yoshino, A. Iwabuchi, K. Katagiri, K. Noto, more

IEEE Transactions on Applied Superconductivity > 2002 > 12 > 1 > 1755 - 1758

Vickers hardness properties of bulk superconductors have been investigated to estimate the mechanical properties of bulk materials. However, the test at cryogenic temperatures had not been conducted at all. Then we conducted Vickers hardness test on (001) plane of YBaCuO and (Sm,Gd)BaCuO bulk superconductors from 40 to 293 K. The hardness of YBaCuO and (Sm,Gd)BaCuO increased with decreasing temperature...

article

Spectro‐Microscopic Characterization of Elastomers Subjected to Laser‐Induced Shock Waves

Nha Uyen Huynh, Carlos Gamez, George Youssef

Macromolecular Materials and Engineering > 307 > 2 > n/a - n/a

The core of this research is separated into three domains, the ultrahigh strain rate response of elastomeric polymers, laser‐induced shock waves , and terahertz time‐domain spectroscopy (THz‐TDS). Elastomers, e.g., polyurea, constitute an advance class of materials suitable for many applications, specifically in high impact loading scenarios, thus, a laser‐induced shock wave (LSW) experimental technique...

article

Lateral‐pushing induced surface lift‐up during nanoindentation of silicate glass

Linfeng Ding, Yanan Xu, Rui Yang, Yongjian Yang, more

Journal of the American Ceramic Society > 105 > 4 > 2625 - 2633

Shear flow and/or densification have been long considered as the main mechanisms accounting for inelastic deformation during indentation of silicate glasses. However, the role of inelastic deformation during indentation of silicate glass is still debated. In this work, the cube‐corner indenter was chosen to perform the nano‐indentation tests on four different types of silicate glasses with a penetration...

article

Textured Electrodes: Manipulating Built‐In Crystallographic Heterogeneity of Metal Electrodes via Severe Plastic Deformation

Jingxu Zheng, Yue Deng, Jiefu Yin, Tian Tang, more

Advanced Materials > 34 > 1 > n/a - n/a

Control of crystallography of metal electrodeposit films has recently emerged as a key to achieving long operating lifetimes in next‐generation batteries. It is reported that the large crystallographic heterogeneity, e.g., broad orientational distribution, that appears characteristic of commercial metal foils, results in rough morphology upon plating/stripping. On this basis, an accumulative roll...

article

Evaluation of plastic deformation and prediction of thermal mechanical fatigue life of an Al–Si alloy piston for diesel engines

Ziliang Li, Jianxing Li, Ye Zhu, Jinbao Guo, more

Fatigue & Fracture of Engineering Materials & Structures > 44 > 11 > 3094 - 3107

In this study, a three‐step prediction method was developed to predict the thermal mechanical fatigue (TMF) life of an Al–Si alloy piston: (1) establishing a relation between the plastic deformation and fatigue life under the temperature cycle of 100–350°C via a series of TMF tests of the aluminum alloy specimens; (2) computing the dangerous plastic deformation of the piston under the thermal shock...

article

Mechanical and thermal stability of retained austenite in plastically deformed bainite-based TRIP-aided medium-Mn steels

Aleksandra Kozłowska, Adam Grajcar, Aleksandra Janik, Krzysztof Radwański, more

Archives of Civil and Mechanical Engineering > 2021 > Vol. 21, no. 3 > 807--820

Advanced medium-Mn sheet steels show an opportunity for the development of cost-effective and light-weight automotive parts with improved safety and optimized environmental performance. These steels utilize the strain-induced martensitic transformation of metastable retained austenite to improve the strength–ductility balance. The improvement of mechanical performance is related to the tailored thermal...

article

Fourier transform fatigue analysis of the stress in tension/tension of HDPE and PA6

Valerian Hirschberg, Manfred Wilhelm, Denis Rodrigue

Polymer Engineering & Science > 61 > 4 > 993 - 1006

Mechanical fatigue under strain controlled tension/tension (T/T) of rectangular un‐notched and notched specimens of high density polyethylene and polyamide 6 was performed. Under large amplitude oscillatory elongation, the stress response is nonlinear asymmetric due to a different stress response during loading and unloading and was analyzed via discrete Fourier transform. Dynamic strain (ε₀) sweep...

article

Reduced Plastic Dilatancy in Polymer Glasses

Qing Peng, Binghui Deng, Marcel Utz

Macromolecular Theory and Simulations > 30 > 2 > n/a - n/a

Amorphous solids in general exhibit a volume change during plastic deformation due to microstructure change during plastic relaxation. Here the deformation dilatancy of alkane polymer glasses upon shearing is investigated using molecular static simulations at zero temperature and pressure. The dilatancy of linear alkane chains has been quantified as a function of strain and chain length. It is found...

article

Effect of Deformation Temperature on the Magnetic Properties of PrFeB Alloy Fabricated by Gas Atomization

Ju-Young Cho, Myung-Suk Song, Yong-Ho Choa, Taek-Soo Kim

Archives of Metallurgy and Materials > 2021 > Vol. 66, iss. 4 > 955--958

To form the fine micro-structures, the Pr₁₇Fe₇₈B₅ magnet powders were produced in the optimized gas atomization conditions and it was investigated that the formation of the textures, microstructures, and the changes in the magnetic properties with increasing the deformation temperatures and rolling directions. Due to the rapid cooling system than the casting process, the homogenous microstructures...

article

Numerical simulation of plastic deformation in direct-drive friction welding of AISI 4140 and ASTM A106 steel tubes

J. Hashemi Khosrowshahi, M. H. Sadeghi, A. Rasti

Archives of Civil and Mechanical Engineering > 2020 > Vol. 20, no. 4 > 268--280

Direct-drive friction welding of ASTM A106 and AISI 4140 steel tubes has been investigated both experimentally and numerically. A remeshing technique was implemented to accurately simulate highly distorted flashes during the FE simulation. The results revealed that the circumferential thermal expansion led to a higher contact pressure at the inner diameter of the interface and consequently, inner...

article

Predicting the available work from deformation‐induced α′′ martensite formation in metastable β Ti alloys

Frank Niessen, Elena V. Pereloma, Ahmed A. Saleh

Journal of Applied Crystallography > 53 > 4 > 1015 - 1028

Deformation‐induced α′′ martensite formation is essential to the mechanical properties of a variety of metastable β Ti alloys by extending elasticity or contributing to work‐hardening during plastic deformation. Nevertheless, to date, a comprehensive analysis of the effect of β texture and applied stress state on the martensitic transformation to α′′ is still lacking. The present study therefore provides...

article

Electro‐mechanical deformation of amorphous and semi‐crystalline polymeric films

Ci Zhang, Zhenpeng Li, Haofei Nian, Lei Zhu, more

Journal of Applied Polymer Science > 137 > 40 > n/a - n/a

In our previous study, electrically induced mechanical stress was produced on monolithic polycarbonate (PC) films under a DC voltage using a needle‐plane electrode setup. This study investigated other materials with various structures and dielectric constants, in order to further understand the deformation mechanism. It was found that the elastic behavior occurred at electric fields intensities below...

article

Prediction of magnetic properties of a plastically deformed steel and one way to measure its plastic deformation

M. J. Sablik

Advances in Materials Science > 2020 > Vol. 20, nr 2(64) > 5--13

In this paper, we use a phenomenological model based on the Jiles-Atherton-Sablik model of stress affecting the magnetic hysteresis of magnetic materials as modified when stress goes past the yield stress. We use this to show that (1) the model produces sharp shearing of hysteresis curves, as seen experimentally and that (2) it also produces a step in the hysteresis loss at small residual plastic...

article

Numerical modeling of plastic deformation and failure around a wellbore in compaction and dilation modes

Aboozar Garavand, Yuri Pavlovich Stefanov, Yuri Leonidovich Rebetsky, Rustam Alfredovich Bakeev, more

International Journal for Numerical and Analytical Methods in Geomechanics > 44 > 6 > 823 - 850

In many wellbore stability analyses, the ability to forecast both the occurrence and extent of plastic deformation and failure hinges upon a fundamental understanding of deformation mode and failure mechanism in the reservoir rock. This study focuses on analyzing plastic zones, localized deformations, and failures around a borehole drilled overbalanced or underbalanced through a highly porous rock...

article

A Mechanistic Perspective on Plastically Flexible Coordination Polymers

Biswajit Bhattacharya, Adam A. L. Michalchuk, Dorothee Silbernagl, Max Rautenberg, more

Angewandte Chemie International Edition > 59 > 14 > 5557 - 5561

Mechanical flexibility in single crystals of covalently bound materials is a fascinating and poorly understood phenomenon. We present here the first example of a plastically flexible one‐dimensional (1D) coordination polymer. The compound [Zn(μ‐Cl)₂(3,5‐dichloropyridine)₂]_n is flexible over two crystallographic faces. Remarkably, the single crystal remains intact when bent to 180°. A combination of...

article

Achievements in micromagnetic techniques of steel plastic stage evaluation

M. F. de Campos

Advances in Materials Science > 2020 > Vol. 20, nr 1(63) > 16--55

The investigation of plastic deformation and residual stress by non-destructive methods is a subject of large relevance for the industry. In this article, the difference between plastic and elastic deformation is discussed, as well as their effects on magnetic measurements, as hysteresis curve and Magnetic Barkhausen Noise. The residual stress data can be obtained with magnetic measurements and also...

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Search results

Study of the effect of the silver content on the structural and mechanical behavior of Ag–ZrCN coatings for orthopedic prostheses

Calorimetric features of release of plastic deformation induced internal stresses, and approach to equilibrium state on annealing of crystals and glasses

A unified internal state variable material model for inelastic deformation and microstructure evolution in SS304

Investigation of the stress-strain state of seamless pipe in the initial state

An evaluation of mechanical properties of YBaCuO and (Sm,Gd)BaCuO bulk superconductors using Vickers hardness test at cryogenic temperatures

Spectro‐Microscopic Characterization of Elastomers Subjected to Laser‐Induced Shock Waves

Lateral‐pushing induced surface lift‐up during nanoindentation of silicate glass

Textured Electrodes: Manipulating Built‐In Crystallographic Heterogeneity of Metal Electrodes via Severe Plastic Deformation

Evaluation of plastic deformation and prediction of thermal mechanical fatigue life of an Al–Si alloy piston for diesel engines

Mechanical and thermal stability of retained austenite in plastically deformed bainite-based TRIP-aided medium-Mn steels

Fourier transform fatigue analysis of the stress in tension/tension of HDPE and PA6

Reduced Plastic Dilatancy in Polymer Glasses

Effect of Deformation Temperature on the Magnetic Properties of PrFeB Alloy Fabricated by Gas Atomization

Numerical simulation of plastic deformation in direct-drive friction welding of AISI 4140 and ASTM A106 steel tubes

Predicting the available work from deformation‐induced α′′ martensite formation in metastable β Ti alloys

Electro‐mechanical deformation of amorphous and semi‐crystalline polymeric films

Prediction of magnetic properties of a plastically deformed steel and one way to measure its plastic deformation

Numerical modeling of plastic deformation and failure around a wellbore in compaction and dilation modes

A Mechanistic Perspective on Plastically Flexible Coordination Polymers

Achievements in micromagnetic techniques of steel plastic stage evaluation

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