Browsing University of Waterloo by Author "Jahed, Hamid"
Now showing items 1-20 of 23
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Anisotropy in the quasi-static and cyclic behavior of ZK60 extrusion: Characterization and fatigue modeling
Pahlevanpour, Amirhossein H.; Karparvarfard, Seyyed M. H.; Shaha, Sugrib K.; Behravesh, Seyed Behzad; Adibnazari, Saeed; Jahed, Hamid (Elsevier, 2018-12-15)The quasi-static and strain-controlled fatigue characteristics of ZK60 extrusion have been investigated along three different directions: the extrusion direction (ED), the radial direction (RD), and 45° to the extrusion ... -
An asymmetric elastic-plastic analysis of the load-controlled rotating bending test and its application in the fatigue life estimation of wrought magnesium AZ31B
Kalatehmollaei, E.; Mahmoudi-Asl, Hassan; Jahed, Hamid (Elsevier, 2014-07-01)Due to different deformation mechanisms arising from limited slip systems in HCP wrought magnesium alloys, their yield and hardening in tension and compression are different. Consequently, the cyclic behavior of these ... -
Characterization of anisotropic behaviour of ZK60 extrusion under stress-control condition and notes on fatigue modeling
Pahlevanpour, A.H.; Behravesh, S.B.; Adibnazari, S.; Jahed, H. (Elsevier, 2019-10)The anisotropic fatigue behavior of ZK60 is investigated through stress-control tests along two different material directions: extrusion (ED) and radial (RD) directions. The in-plane random texture along RD promotes ... -
Characterization of magnesium spot welds under tensile and cyclic loadings
Behravesh, Seyed Behzad; Jahed, Hamid; Lambert, Steve (Elsevier, 2011-12-01)Resistance spot welds of a magnesium alloy were characterized in terms of microstructure, hardness and monotonic and cyclic properties. Microstructural features in base metal and different zones in the weld region were ... -
Characterization of single- and multilayer cold-spray coating of Zn on AZ31B
Marzbanrad, Bahareh; Toyserkani, Ehsan; Jahed, Hamid (Elsevier, 2021-06-25)Zinc, a soft material with a low melting point and high corrosion resistance, was coated onto AZ31B Mg alloy using different cold spraying process parameters. The physical and mechanical properties of the resulting Zn/AZ31B ... -
Cohesive zone modeling of ductile tearing process in brazed joints
Ghovanlou, Morvarid K.; Jahed, Hamid; Khajepour, Amir (Elsevier, 2013-04-01)Ductile tearing process in low carbon steel brazed joints with copper filler metal is studied using the Cohesive Zone Model. The Cohesive Zone Model is characterized by two parameters related to the cohesive strength and ... -
Cohesive zone modeling of fatigue crack growth in brazed joints
Ghovanlou, Morvarid K.; Jahed, Hamid; Khajepour, Amir (Elsevier, 2014-04-01)Fatigue crack growth in low carbon steel brazed joints with copper filler metal is modeled by an irreversible Cohesive Zone Model. Strain-controlled fatigue tests are performed on the brazed specimens, and the corresponding ... -
Effect of forging on the low cycle fatigue behavior of cast AZ31B Alloy
Toscano, Dwayne; Shaha, Sugrib K.; Behravesh, Seyed Behzad; Jahed, Hamid; Williams, Bruce W. (Elsevier, 2017-08-26)The effect of forging on the low cycle fatigue (LCF) behavior of cast AZ31B was investigated. The forging process was conducted at a temperature of 450°C and speed of 390mm/min. Fully reversed (Rε=-1) strain controlled ... -
The effect of pure aluminum cold spray coating on corrosion and corrosion fatigue of magnesium (3% Al-1% Zn) extrusion
Diab, Mohammad; Pang, Xin; Jahed, Hamid (Elsevier, 2017-01-15)Pure aluminum powder was successfully sprayed on AZ31B extrusion flat and round coupons at low temperature. The corrosion and corrosion fatigue behavior of the coated and uncoated samples were examined by performing ... -
Fatigue characteristics and modeling of cast and cast-forged ZK60 magnesium alloy
Karparvarfard, S. M. H.; Shaha, Sugrib K.; Behravesh, Seyed Behzad; Jahed, Hamid; Williams, Bruce W. (Elsevier, 2019-01-01)The fatigue behavior of as-cast and cast-forged ZK60 magnesium alloy was investigated via fully-reversed strain controlled fatigue tests at different strain amplitudes. Microstructure analysis, texture measurement, and SEM ... -
Fatigue characterization and modeling of AZ31B magnesium alloy spot-welds
Behravesh, Seyed Behzad; Jahed, Hamid; Lambert, Steve (Elsevier, 2014-07-01)Cyclic behavior of AZ31B spot-welds was studied using different specimen configurations, and compared with steel and aluminum spot-welds. Fatigue strength of magnesium spot-welds was similar to aluminum and less than steel. ... -
Fatigue Life Prediction of an Automotive Chassis System with Combined Hardening Material Model
George, John K.; Gross, Daniel; Jahed, Hamid; Roostaei, Ali Asghar (Society of Automotive Engineers, 2016-04-05)The choice of an appropriate material model with parameters derived from testing and proper modeling of stress-strain response during cyclic loading are the critical steps for accurate fatigue-life prediction of complex ... -
Interfacial bonding mechanisms between aluminum and titanium during cold gas spraying followed by friction-stir modification
Khodabakhshi, Farzad; Marzbanrad, Bahareh; Jahed, Hamid; Gerlich, Adrian P. (Elsevier, 2018-12-31)This paper closely evaluates the interfacial bonding mechanism between titanium particles deposited on an aluminum alloy substrate by cold gas spraying followed by friction-stir processing (FSP). After cold spraying and ... -
A Lagrangian model for hardening behaviour of materials at finite deformation based on the right plastic stretch tensor
Eshraghi, Amin; Jahed, Hamid; Lambert, Steve (Elsevier, 2010-05-01)In this paper a modified multiplicative decomposition of the right stretch tensor is proposed and used for finite deformation elastoplastic analysis of hardening materials. The total symmetric right stretch tensor is ... -
Load path sensitivity and fatigue life estimation of 30CrNiMo8HH
Noban, M.; Jahed, Hamid; Ibrahim, E.; Ince, Ayhan (Elsevier, 2012-04-01)A set of strain-controlled biaxial proportional and non-proportional tests were conducted on solid and tubular specimens of 30CrNiMo8HH steel. The effect of the phase angle on fatigue life was studied. This effect becomes ... -
Low-cycle fatigue characterization and texture induced ratcheting behaviour of forged AZ80 Mg alloys
Gryguc, Andrew; Behravesh, Seyed Behzad; Shaha, Sugrib K.; Jahed, Hamid; Wells, Mary; Williams, Bruce W.; Su, Xuming (Elsevier, 2018-11-01)Stress-controlled uniaxial “push-pull” fatigue testing was conducted on as-received (cast and extruded) and closed-die cast-forged and extruded-forged AZ80 Mg alloy. The as-cast material possessed random texture and somewhat ... -
Microstructure, texture and mechanical behavior characterization of hot forged cast ZK60 magnesium alloy
Karparvarfard, S.M.H.; Shaha, Sugrib K.; Behravesh, Seyed Behzad; Jahed, Hamid; Williams, Bruce W. (Elsevier, 2017-04-14)Uniaxial tension and compression tests were conducted to investigate the quasi-static performance of ZK60 Mg alloy in cast, followed by forging at optimum temperature of 450°C and a ram speed of 39mmmin-1. Microstructure ... -
Monotonic and cyclic behaviour of cast and cast-forged AZ80 Mg
Gryguc, Andrew; Shaha, Sugrib K.; Behravesh, Seyed Behzad; Jahed, Hamid; Wells, Mary; Williams, Bruce W.; Su, X. (Elsevier, 2017-11)Tensile and strain-controlled fatigue tests were performed to investigate the influence of forging on the performance of cast AZ80 magnesium alloy. The obtained microstructural analysis showed that the as-cast AZ80 magnesium ... -
Multiaxial cyclic behaviour and fatigue modelling of AM30 Mg alloy extrusion
Roostaei, Ali Asghar; Jahed, Hamid (Elsevier, 2017-04-01)Multiaxial fatigue characteristics of AM30 Mg alloy extrusion are studied through fully-reversed strain controlled cyclic experiments including pure torsional and combined axial-torsional at 0, 45 and 90 phase angle shifts. ... -
Role of heat balance on the microstructure evolution of cold spray coated AZ31B with AA7075
Marzbanrad, Bahareh; Razmpoosh, Mohammad Hadi; Toyserkani, Ehsan; Jahed, Hamid (Elsevier, 2021-07)A promising solid-state coating mechanism based on the cold spray technique provides highly advantageous conditions on thermal-sensitive magnesium alloys. To study the effect of heat balance in cold spray coating on ...