Effect of Addition of Nano-Al2O3 and Copper Particulates and Heat Treatment on the Tensile Response of AZ61 Magnesium Alloy

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Q. B. Nguyen ◽  
Y. H. D. Chua ◽  
K. S. Tun ◽  
J. Chan ◽  
R. Kwok ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloy ◽  
Mechanical Response ◽  
Hot Extrusion ◽  
Secondary Phase ◽  
Secondary Phases ◽  
Microstructural Characteristics ◽  
Tensile Response ◽  
Az61 Magnesium Alloy ◽  
Melt Deposition

In this paper, AZ61 magnesium alloy composites containing nanoalumina and micron-sized copper particulates are synthesized using the technique of disintegrated melt deposition followed by hot extrusion. The simultaneous addition of nano-Al2O3 and copper particulates led to an overall improvement in both microstructural characteristics in terms of distribution and morphology of secondary phases and mechanical response of AZ61. The presence of nanoalumina particulates broke down and dispersed the secondary phase Mg17Al12. The 0.2% yield strength increased from 216 MPa to 274 MPa. The ductility increased from 8.4% to 9.3% in the case of the AZ61-1.5Al2O3 sample. The results of aging heat treatment in the case of the AZ61-1.5Al2O3-1Cu sample showed significant improvement in both tensile strength, ductility, and work of fracture (54% increment). An attempt is made to correlate the tensile response of composites with their microstructural characteristics.

scholarly journals Enhancing Mechanical Response of Monolithic Magnesium Using Nano-NiTi (Nitinol) Particles

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1014 ◽  
Author(s):  
Gururaj Parande ◽  
Vyasaraj Manakari ◽  
Saif Wakeel ◽  
Milli Kujur ◽  
Manoj Gupta
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Hot Extrusion ◽  
Nickel Titanium ◽  
Structure Property ◽  
Microstructural Characteristics ◽  
Magnesium Matrix ◽  
Melt Deposition ◽  
Synthesized Materials ◽  
Minimal Adverse Effect

The present study focuses on investigating the effects of Nickel-Titanium (NiTi) nanoparticles on the microstructure and properties of pure Mg. Mg composites containing varying weight percentages (0.5, 1, 1.5, 3) of NiTi nanoparticles were fabricated using Disintegrated Melt Deposition (DMD), followed by hot extrusion. The synthesized materials were characterized in order to investigate their physical, microstructural and mechanical properties. Synthesized materials were characterized for their density and porosity levels, microstructural characteristics, and mechanical response. Superior grain refinement was realized by the presence of NiTi nanoparticles in the magnesium matrix. The addition of NiTi nanoparticles resulted in strength property enhancements of pure Mg with minimal adverse effect on the ductility. Structure-property evaluations are detailed in the current study.

scholarly journals Corrosion Behavior, Microstructure and Mechanical Properties of Novel Mg-Zn-Ca-Er Alloy for Bio-Medical Applications

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 519
Author(s):  
Devadas Bhat Panemangalore ◽  
Rajashekhara Shabadi ◽  
Manoj Gupta
Keyword(s):  
Mechanical Properties ◽  
Corrosion Behavior ◽  
Base Material ◽  
Hot Extrusion ◽  
Secondary Phases ◽  
Zinc Alloys ◽  
Alloying Additions ◽  
Degradation Rates ◽  
Master Alloys ◽  
Melt Deposition

In this study, the effect of calcium (Ca) and erbium (Er) on the microstructure, mechanical properties, and corrosion behavior of magnesium-zinc alloys is reported. The alloys were prepared using disintegrated melt deposition (DMD) technique using the alloying additions as Zn, Ca, and Mg-Er master alloys and followed by hot extrusion. Results show that alloying addition of Er has significantly reduced the grain sizes of Mg-Zn alloys and also when compared to pure magnesium base material. It also has substantially enhanced both the tensile and the compressive properties by favoring the formation of MgZn2 type secondary phases that are uniformly distributed during hot-extrusion. The quaternary Mg-Zn-Ca-Er alloy exhibited the highest strength due to lower grain size and particle strengthening due to the influence of the rare earth addition Er. The observed elongation was a result of extensive twinning observed in the alloys. Also, the degradation rates have been substantially reduced as a result of alloying additions and it is attributed to the barrier effect caused by the secondary phases.

scholarly journals Heat Treated AZ61 Magnesium Alloy Obtained by Direct Extrusion and Continuous Rotary Extrusion Process

2016 ◽  
Vol 61 (1) ◽  
pp. 405-410
Author(s):  
M. Bigaj ◽  
S. Boczkal ◽  
J. Żelechowski ◽  
M. Gawlik ◽  
M. Mitka
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloy ◽  
Treatment Process ◽  
Extrusion Process ◽  
Direct Extrusion ◽  
Preferred Direction ◽  
Decomposition Of Solid Solution ◽  
Az61 Magnesium Alloy ◽  
Heat Treated ◽  
Low Degree

The results of studies carried out on the heat treated AZ61 magnesium alloy extruded by two methods, i.e. direct extrusion and continuous rotary extrusion, were presented. As part of the work, parameters of the T6 heat treatment were proposed and aging curves were plotted. The solution heat treatment process was accompanied by the grain growth. During artificial aging, due to the decomposition of solid solution, the β-Mg17Al12 phase was precipitated from the supersaturated α solution. It precipitated in a coagulated form at the grain boundaries and in the form of fine-dispersed plates arranged in a preferred direction relative to the grain orientation. Rods obtained by continuous rotary extrusion, unlike those made by the direct process, exhibited a low degree of texturing and lack of anisotropic properties.

scholarly journals TiC Nanoparticle Addition to Enhance the Mechanical Response of Hybrid Magnesium Alloy

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Muralidharan Paramsothy ◽  
Jimmy Chan ◽  
Richard Kwok ◽  
Manoj Gupta
Keyword(s):  
Magnesium Alloy ◽  
Yield Strength ◽  
Mechanical Response ◽  
Failure Strain ◽  
Hot Extrusion ◽  
Longitudinal Direction ◽  
Tensile Yield Strength ◽  
Compressive Yield Strength ◽  
Nanoparticle Distribution ◽  
Tic Nanoparticle

A hybrid magnesium alloy nanocomposite containing TiC nanoparticle reinforcement was fabricated using solidification processing followed by hot extrusion. The nanocomposite exhibited similar grain size to the monolithic hybrid alloy, reasonable TiC nanoparticle distribution, nondominant (0 0 0 2) texture in the longitudinal direction, and 16% higher hardness than the monolithic hybrid alloy. Compared to the monolithic hybrid alloy, the nanocomposite simultaneously exhibited higher tensile yield strength (0.2% TYS), ultimate tensile strength (UTS), failure strain, and work of fracture (WOF) (+14%, +7%, +81%, and +92%, resp.). Compared to the monolithic hybrid alloy, the nanocomposite exhibited lower compressive yield strength (0.2% CYS) and higher ultimate compressive strength (UCS), failure strain, and WOF (–11%, +7%, +4%, and +15%, resp.). The advantageous effects of TiC nanoparticle addition on the enhancement of tensile and compressive properties of the hybrid magnesium alloy are investigated in this paper.

On the Influence of Carbon Nanotubes and Processing on Tensile Response and Fracture Behavior of a Magnesium Alloy

2011 ◽  
Vol 410 ◽  
pp. 133-141
Author(s):  
Tirumalai S. Srivatsan ◽  
C. Godbole ◽  
Muralidharan Paramsothy ◽  
Manoj Gupta
Keyword(s):  
Magnesium Alloy ◽  
Fracture Behavior ◽  
Tensile Deformation ◽  
Hot Extrusion ◽  
Microstructural Development ◽  
Unreinforced Alloy ◽  
Engineering Strain ◽  
Alloy Az31 ◽  
Tensile Response ◽  
Macroscopic Fracture

Carbon nanotube (CNT) reinforced magnesium alloy (AZ31)-based composite was fabricated using the technique of solidification processing followed by hot extrusion. In this paper is presented and briefly discussed the conjoint influence of reinforcement and processing on microstructural development, microhardness, tensile deformation and final fracture behavior of the magnesium alloy composite and comparisons made with the unreinforced alloy (AZ31). The interactive influences of the CNT reinforcement and processing in governing engineering stress versus engineering strain response and tensile properties is neatly presented and discussed. The macroscopic fracture mode and intrinsic microscopic mechanisms governing quasi-static deformation and fracture behavior of both the CNT reinforced and unreinforced magnesium alloy is both elaborated and rationalized in light of the specific role played by presence of reinforcing phase in the magnesium alloy metal matrix, intrinsic microstructural effects and nature of loading.

Effect of Sintering Conditions on the Phase Formation and Microstructure of Bi-2223/Ag/Ni Composite-Sheathed Tapes

2013 ◽  
Vol 745-746 ◽  
pp. 239-242
Author(s):  
Xing Pin Chen ◽  
Meng Liu ◽  
Xiao Wei Yu ◽  
Ming Ya Li
Keyword(s):  
Heat Treatment ◽  
Phase Formation ◽  
Microstructure Evolution ◽  
Significant Influence ◽  
Sintering Temperature ◽  
Secondary Phase ◽  
Secondary Phases ◽  
Different Temperatures ◽  
Sintering Conditions ◽  
Powder In Tube

Effect of sintering conditions in the first heat treatment on the phase and microstructure evolution of Bi-2223/Ag/Ni composite-sheathed tapes fabricated by powder-in-tube method was studied. Samples were sintered at different temperatures for different time in an atmosphere of 14.5% O2. The results showed that this higher O2 atmosphere improved the content of Bi-2223 phase. XRD and SEM results showed that Bi-2223 content increased with the extension of the dwelling time. Meanwhile, the sintering temperature had significant influence on the Bi-2223 content and secondary phase dimensions as well. With the increase of the sintering temperature, the Bi-2223 content reached to a maximum at 834. With further increase of sintering temperature, the Bi-2223 phase was decomposed to Bi-2212 and others secondary phases.

Influence of Cerium on the Deformation and Corrosion of Magnesium

2016 ◽  
Vol 138 (3) ◽  
Author(s):  
Sravya Tekumalla ◽  
Sankaranarayanan Seetharaman ◽  
Nguyen Quy Bau ◽  
Wai Leong Eugene Wong ◽  
Chwee Sim Goh ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electron Microscope ◽  
Hot Extrusion ◽  
Microstructural Characterization ◽  
Xrd Analysis ◽  
Compressive Deformation ◽  
Heat Treated ◽  
Before And After ◽  
Elongation To Failure ◽  
Melt Deposition

In this study, a new magnesium (Mg) alloy containing 0.4% Ce was developed using the technique of disintegrated melt deposition followed by hot extrusion. The tensile and compressive properties of the developed Mg–0.4Ce alloy were investigated before and after heat treatment with an intention of understanding the influence of cerium on the deformation and corrosion of magnesium. Interestingly, cerium addition has enhanced the strength (by 182% and 118%) as well as the elongation to failure of Mg (by 93% and 8%) under both tensile and compressive loadings, respectively. After heat treatment, under compression, the Mg–0.4Ce(S) alloy exhibited extensive plastic deformation which was 80% higher than that of the as-extruded condition. Considering the tensile and compressive flow curves, the as-extruded Mg–0.4Ce and the heat treated Mg–0.4Ce(S) alloys exhibited variation in the nature and shape of the curves which indicates a disparity in the tensile and compressive deformation behavior. Hence, these tensile and compressive deformation mechanisms were studied in detail for both as-extruded as well as heat treated alloys with the aid of microstructural characterization techniques (scanning electron microscope (SEM), transmission electron microscope (TEM), selective area diffraction (SAD), and X-ray diffraction (XRD) analysis. Furthermore, results of immersion tests of both as-extruded and heat treated alloys revealed an improved corrosion resistance (by ∼3 times in terms of % weight loss) in heat treated state vis-a-vis the as-extruded state.

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