Results 221 to 230 of about 211,967 (262)

Precipitation in Mg–Mn alloys

Metal Science, 1983
AbstractPrecipitation in a Mg–1·58Mn (wt-%) alloy has been studied by means of transmission electron microscopy and electrical resistivity measurements. During heat treatment between 390 and 530°C only the equilibrium phase α Mn is formed. The precipitates are fine rods parallel to [00.1]Mg and the three Mg directions.
P. M. Skjerpe, C. J. Simensen
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The Mg impurity in nitride alloys

AIP Conference Proceedings, 2014
Although several magnetic resonance studies address the Mg acceptor in GaN, there are few reports on Mg doping in the alloys, where hole production depends strongly on the Al or In content. Our electron paramagnetic resonance (EPR) measurements of the p-type alloys suggest that the Mg impurity retains the axial symmetry, characteristic of a p-type ...
Andrew A. Allerman, Ustun Sunay, Mary Ellen Zvanut, Ke Wang, Daniel D. Koleske, Tsutomu Araki, Yasushi Nanishi, W. R. Willoughby   +7 more
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Surface Alloying of Mg Alloys After Surface Nanocrystallization

Journal of Nanoscience and Nanotechnology, 2008
Surface nanocrystallization using a surface mechanical attrition treatment effectively activates the surface of magnesium alloys due to the increase in grain boundary diffusion channels. As a result, the temperature of subsequent surface alloying treatment of pure Mg and AZ91 alloy can be reduced from 430 °C to 380 °C.
Ming-Xing Zhang, H.Q. Sun, Patrick M. Kelly, Y.-N. Shi   +3 more
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Sacrificial Cathodic Protection of Mg Alloy AZ31B by an Mg–5Sn Surface Alloy

2019
A solid solution Mg–5Sn alloy is evaluated as a sacrificial anode for the cathodic protection of AZ31B. Uncoupled Mg–5Sn is shown to have superior barrier properties and reduced cathodic kinetics relative to AZ31B. The performance as a sacrificial anode was studied in situ with global and local measurements of galvanic coupling between the Mg–5Sn alloy
T. W. Cain, Carol Glover, John R. Scully
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Mechanical alloying of Fe and Mg

Journal of Alloys and Compounds, 1997
Abstract We performed mechanical alloying of Fe and Mg powders with a wide range of compositions and characterized the as-milled alloys with X-ray powder diffractometry, rotating sample magnetometry, density measurements, and Mossbauer spectrometry.
A. Hightower, Robert C. Bowman, Brent Fultz   +2 more
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Interaction of hydrogen with an Mg–Al alloy

Journal of Alloys and Compounds, 2005
Abstract The interaction of hydrogen with an Mg–Al alloy pre-exposed to air have been studied with in situ time resolved X-ray powder diffraction. Phase fractions as a function of time are derived from series of consecutive diffraction patterns allowing kinetic analysis.
Andreasen, A., Sørensen, M.B., Burkarl, R., Møller, B., Molenbroek, A.M., Pedersen, A.S., Andreasen, J.W., Nielsen, M.N., Jensen, Torben René   +8 more
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Applications of thermodynamic calculations to Mg alloy design: Mg–Sn based alloy development

International Journal of Materials Research, 2007
Abstract Recently an Mg – Sn based alloy system has been investigated actively in order to develop new magnesium alloys which have a stable structure and good mechanical properties at high temperatures. Thermodynamic modeling of the Mg – Al – Mn – Sb – Si – Sn – Zn system was performed based on available thermodynamic, phase equilibria ...
Jung, IH, Kang, DH, Park, WE, Kim, NJ, Ahn, SH   +4 more
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Structure evolution of EV31 Mg alloy

Journal of Alloys and Compounds, 2008
Abstract Structure modifications and precipitation hardening of EV31 Mg alloy have been monitored by calorimetric measurements (DSC), TEM observations and positron annihilation spectroscopy (PAS). At the early stages of precipitation DSC measurements and TEM observations evidenced the formation of a β″ phase, while the presence of an intermediate β ...
G. RIONTINO, D. LUSSANA, M. MASSAZZA, G. BARUCCA, P. MENGUCCI, FERRAGUT, RAFAEL OMAR   +5 more
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Development of Creep Resistant Mg Alloys

Materials Science Forum, 2005
A study has been made on the tensile and creep properties of squeeze and die cast Mg alloys, with emphasis on the effect of second phase particles. Two different microstructures were compared; the microstructure with thermally unstable particles along grain boundaries (AZ91 alloy) and the microstructure with thermally stable particles along grain ...
Kang, DH, Yoo, MS, Park, Sung Soo, Kim, NJ   +3 more
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Thermochemical investigation of Sm–Mg alloys

Calphad, 2014
Abstract The paper focuses on the thermochemical behaviour of the binary Sm–Mg alloys. The enthalpies of formation of the Sm–Mg intermetallic compounds have been determined at 300 K by high temperature direct synthesis calorimetry. The following results in kJ/mole of atoms are reported: −18.5±2 (SmMg), −16.0±2 (SmMg 2 ), −12.0±2 (SmMg 3 ), −8.5±2 ...
DELSANTE, SIMONA, BORZONE, GABRIELLA
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