Results 141 to 150 of about 958 (181)

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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Improvements in the metallography of as-cast AZ91 alloy

Materials Characterization, 2004
Evaluation of the grain structure and grain size of cast magnesium–aluminum alloys is usually performed after grainboundary-enhancing treatments which involve tedious heat treatment at high temperature. In this work, a rapid and simple etching method is described for metallographic preparation of AZ91 alloy, revealing grains without altering the as ...
A Maltais, D Dubé, M Fiset, G Laroche, S Turgeon   +4 more
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AZ91D and AZ91E ALLOYS

Alloy Digest, 1988
Abstract AZ91D and AZ91E alloys are magnesium-aluminum-zinc-manganese alloys of closely controlled purity. Ingot is available for use in the production of improved corrosion resistant sand, permanent-mold and die castings. AZ91D is used for die casting and AZ91E for sand and permanent-mold castings. This datasheet provides information on
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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 behaviour of Mg-alloy AZ91E with atypical alloying additions

Journal of Alloys and Compounds, 2009
Abstract Magnesium alloys are the lightest of all the structural metals with good strength/weight ratio and castability, however their application continues to be severely limited by relatively poor resistance to corrosion. Unlike most passivating metallic materials which develop their own protective surface oxide, magnesium suffers continued ...
A.D. Südholz, N. Birbilis, C.J. Bettles, M.A. Gibson   +3 more
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Superplasticity of AZ91 Alloy ECAPed with Different Routes

Advanced Materials Research, 2011
Equal channel angular pressing (ECAP) was conducted using the die with a 90° angled channel under routes A, BC and C for hot extruded AZ91 magnesium alloy. Tensile tests were carried out at 300 °C and initial strain rates ranging from 2×10−4 to 5×10−3 s−1.
Feng Li, Sheng Guo, Xin Che, Li Jia Chen
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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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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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Damping behaviour of AZ91 magnesium alloy with cracks

Materials Science and Engineering: A, 2004
Abstract The amplitude-dependent damping of a commercial magnesium cast alloy AZ91 was determined at room temperature by measurement of the logarithmic decrement of free decaying vibrations of bending beams clamped at one side. In order to generate cracks in the specimens they were subjected to (1) isochronal heat treatments for 1 h at temperatures ...
Jürgen Göken, Werner Riehemann
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Characterisation of TG-SCC In Pure Magnesium and AZ91 Alloy

2008
Our recent critical review of the stress corrosion cracking (SCC) of magnesium aims to provide a foundation for the safe and effective use of magnesium alloys, including practical guidelines for the service use of Mg alloys in the atmosphere and/or in contact with aqueous solutions.
Winzer, N., Song, G., Atrens, A., Dietzel, W., Blawert, C.   +4 more
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