Results 171 to 180 of about 1,938 (214)

Dendritic solidification of magnesium alloy AZ91

Metallurgical Transactions A, 1990
The magnesium alloy AZ91 has been studied under different solidification conditions, to establish the details of the as-cast structure. The electron backscattered pattern (EBSP) technique has been used to determine the crystallographic directions of the dendrite stem and the secondary arms.
K. Pettersen, O. Lohne, N. Ryum
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Superplasticity in magnesium alloy AZ91

Materials Science and Engineering: A, 1991
Abstract The superplastic properties of conventionally cast and rapidly solidified magnesium alloy AZ91 have been studied. The latter material had by far the best superplastic properties, and elongations of at least 1000% were obtained in the temperature range 275–300 °C. Formation of pores during superplastic deformation had an adverse effect on the
Jan Ketil Solberg, Janne Tørklep, Øystein Bauger, Haavard Gjestland   +3 more
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Surface modification of the AZ91 magnesium alloy

Archives of Civil and Mechanical Engineering, 2015
The main purpose of the study was to modify the surface layer of the AZ91 magnesium alloys with the use of the GTAW (Gas Tungsten Arc Welding) method. The remelting process was conducted with the use of an AC current with the concurrent cooling of the magnesium alloy in the liquid nitrogen bath.
M. Strzelecka, J. Iwaszko, M. Malik, S. Tomczyński   +3 more
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The Origin of Microporosity in Magnesium Alloy AZ91

SAE Technical Paper Series, 1994
<div class="htmlview paragraph">The persistent occurrence of microporosity defects in AZ91 castings has made it difficult to consistently produce sound parts. Earlier work established that dissolved hydrogen gas causes microporosity defects in AZ91; however, the exact role of hydrogen in the nucleation and growth of microporosity was not ...
James D. Shearouse, Barry A. Mikucki
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Effects of titanium addition on mechanical and corrosion behaviours of AZ91 magnesium alloy

Journal of Alloys and Compounds, 2011
The mechanical properties and corrosion behaviour of AZ91 magnesium alloy containing 0.2–0.5wt.%Ti were investigated in this study. Results demonstrate that the enhancement of the ultimate tensilestrength by 18% and yield strength by 47% can be achieved ...
Sennur Candan, E Candan
exaly   +2 more sources

Inverted disk centrifugal atomization of AZ91 magnesium alloy

Canadian Metallurgical Quarterly, 1997
Abstract Magnesium AZ91 alloy powder was produced by centrifugal atomization under various conditions using an inverted disk atomizer. The particle size distribution was obtained as a function of the disk shape and rotation speed. The microstructure of particles and their shape were examined and characterized.
C. Labrecque, R. Angers, R. Tremblay, D. Dubé   +3 more
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Corrosion characteristics of AZ91 magnesium alloy weldments

Materials Research Innovations, 2009
Abstract The welding of AZ91 magnesium alloy was carried out using hybrid welding. The relationships between the microstructures and corrosion behaviours of AZ91 magnesium alloy weldments were investigated. The microstructure was examined using optical microscopy, electron probe microanalysis, scanning electron microscopy and X-ray diffraction analysis.
R. Z. Xu, G. Song, Z. Wang
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The effect of PVD coatings on the corrosion behaviour of AZ91 magnesium alloy

Materials & Design, 2006
In this study, multilayered AlN (AlN + AlN + AlN) and AlN + TiN were coated on AZ91 magnesium alloy using physical vapour deposition (PVD) technique of DC magnetron sputtering, and the influence of the coatings on the corrosion behaviour of the AZ91 ...
Sen, Sadri, ALTUN, Hikmet
exaly   +2 more sources

Corrosion Resistance of RE-AZ91 Magnesium Alloys

Advanced Materials Research, 2014
Rare Earth (RE) were added to industrial AZ91 magnesium alloy, so that RE-AZ91 Mg alloy was produced by the process of die casting, so as to study the effect of RE on corrosion resistance and tensile strength of Mg alloy. The experiment results show that RE addition could improve the tensile strength and corrosion resistance of magnesium alloy at a ...
Jun Jie Yang, Yao Li, Ping Xue
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Effects of Hot Extrusion and Heat Treatment on Mechanical Properties and Microstructures of AZ91 Magnesium Alloy

Energy Procedia, 2012
The effects of heat treatment on the microstructure, tensile property and fracture behavior of as-extruded AZ91 magnesium alloy were studied with OM and SEM.
Liu, Zhaoming, Quan, Gaofeng, Tan, Ming
exaly   +2 more sources