Results 151 to 160 of about 1,042 (181)

Fracture behavior of AZ91 magnesium alloy

Materials Letters, 2000
Abstract Optical microscopy and scanning electron microscopy (SEM) were used to examine the fracture behavior of AZ91 magnesium alloy ruptured by tensile and impact tests. AZ91 alloy generally revealed features of brittle fracture and cleavage is the principal fracture mode.
Q D Wang, Xiaoqin Zeng
exaly   +2 more sources

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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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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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
openaire   +1 more source

Serrated flow in magnesium alloy AZ91

Materials Science and Engineering: A, 2004
Serrated flow has recently been observed in the ternary Mg-9 wt.% Al-1 wt.% Zn alloy AZ91 at room temperature. Binary and ternary alloys with various contents of Zn and Al have, therefore, been tested to determine the extent to which the individual solutes, Al or Zn, are responsible for the serrations.
Corby, C., Cáceres, C. H., Lukáč, P.
openaire   +4 more sources

Growth of Al8Mn5 Intermetallic in AZ91

2017
Al8Mn5 is crucial for impurity control and corrosion resistance of AZ91. We study the growth morphology of primary and eutectic Al8Mn5 after the equiaxed solidification of AZ91 cooled at ~1 K/s. Primary Al8Mn5 grew as ~10 μm equiaxed faceted crystals with multiple growth facets.
G. Zeng, J. W. Xian, C. M. Gourlay
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source