Results 61 to 70 of about 161,376 (364)

Dynamic Precipitation during High‐Pressure Torsion of a Magnesium–Manganese Alloy

Advanced Engineering Materials, EarlyView.
An ultrafine‐grained alloy is produced by high‐pressure torsion of solutionized Mg–1.35 wt% Mn. Precipitation of nanometer‐scale Mn particles during deformation provides pinning sites. This prevents the formation of a bimodal grain structure and results in a finer grain size than for pure Mg.
Julian M. Rosalie, Anton Hohenwarter
wiley   +1 more source

Strength and plasticity of Cr/CrXN multilayers with gradient nanoarchitectures

Materials Research Letters
Refining grain size and enhancing thermally assisted grain boundary activation are fundamental strategies for improving the plasticity of high-strength ceramic materials.
Heda Bai, Jin Li, Lichen Bai, Miao Song, Shijian Zheng, Hualong Ge, Junjie He, Jinyang Ni, Xuesong Leng, Yifan Huang, Xiangli Liu   +10 more
doaj   +1 more source

Strain-Gradient Crystal Plasticity Finite Element Modeling of Slip Band Formation in α-Zirconium

Crystals, 2021
Two methods for the determination of geometrically necessary dislocation (GND) densities are implemented in a lower-order strain-gradient crystal plasticity finite element model. The equations are implemented in user material (UMAT) subroutines. Method I
Omid Sedaghat, Hamidreza Abdolvand
doaj   +1 more source

Laser Metal Deposited Ti4822 Hollow Pipe: Experimental and Computational Modelling Study

Advanced Engineering Materials, EarlyView.
Laser metal deposition (LMD) of a crack‐free built Ti4822 alloys is challenging. This article reports outstanding characteristics of a hollow pipe that is built with LMD technology when a predicted, nontransformation substrate temperature of 800 °C is used.
Sadiq A. Raji, Monnamme Tlotleng, Samuel Skhosane, Lehlogonolo R. Kanyane, Abimbola P. I. Popoola, Sisa L. Pityana   +5 more
wiley   +1 more source

Models of nonlinear kinematic hardening based on different versions of rate-independent maxwell fluid [PDF]

, 2017
Different models of finite strain plasticity with a nonlinear kinematic hardening are analyzed in a systematic way. All the models are based on a certain formulation of a rate-independent Maxwell fluid, which is used to render the evolution of backstresses.
Shutov, Alexey V.
core  

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

Advanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe, János Endre Maróti, Imre Norbert Orbulov, Zoltan Hegedűs, Markus Ziehmer, Carl E. Krill III, Håkan Hallberg, Pär A. T. Olsson, Johan Hektor   +8 more
wiley   +1 more source

Microstructural evolution and deformation mechanisms in CoCrNi medium entropy alloy fabricated by additive and subtractive hybrid manufacturing

Virtual and Physical Prototyping
Additive and subtractive hybrid manufacturing offers great potential for the integrated fabrication of high-performance structural components. CoCrNi MEA specimens were subjected to subtractive manufacturing (SM) immediately after additive manufacturing (
Nan Wang, Wei Yue, Shamima Sultana, YongGang Sun, TianXu Zhao, ChangYu Liu, ZeHao Li, Shuang Su, ZhiLiang Ning, Tung Lik Lee, YanMing Zhang, JianFei Sun, Alfonso H.W. Ngan, YongJiang Huang   +13 more
doaj   +1 more source

Investigating the Effects of Build Height on Mechanical Behavior of Large‐Scale Laser Wire Directed Energy Deposited Nickel Titanium Alloy

Advanced Engineering Materials, EarlyView.
Laser wire directed energy deposition process was leveraged to fabricate large scale NiTi alloy wall. Evaluation of build‐height‐dependent tribo‐mechanical properties revealed significant differences in location specific sample characteristics. The middle region achieved optimal performance (superior wear resistance, balanced strength‐ductility ...
Hyunsuk Choi, Prayag Burad, Piash Bhowmik, Vishal Mahey, Yashwanth Bandari, Sougata Roy   +5 more
wiley   +1 more source

Plastic deformation modelling of tempered martensite steel block structure by a nonlocal crystal plasticity model

Theoretical and Applied Mechanics Letters, 2014
The plastic deformations of tempered martensite steel representative volume elements with different martensite block structures have been investigated by using a nonlocal crystal plasticity model which considers isotropic and kinematic hardening produced
Martin Boeff, Anxin Ma, Alexander Hartmaier   +2 more
doaj   +1 more source

Size Scaling of Plastic Deformation in Simple Shear: Fractional Strain-Gradient Plasticity and Boundary Effects in Conventional Strain-Gradient Plasticity

Journal of applied mechanics, 2020
A recently developed model based on fractional derivatives of plastic strain is compared with conventional strain-gradient plasticity (SGP) models. Specifically, the experimental data and observed model discrepancies in the study by Mu et al.
C. Dahlberg, M. Ortiz
semanticscholar   +1 more source