scholarly journals Effect of Solution Treatment on Microstructure and Properties of Gd - AZ91 Magnesium Alloy

2018 ◽  
Vol 301 ◽  
pp. 012009
Author(s):  
Yao Li ◽  
Huiling Wang
Keyword(s):  
Magnesium Alloy ◽  
Solution Treatment ◽  
Az91 Magnesium Alloy ◽  
Microstructure And Properties ◽  
Az91 Magnesium

Effect of deep surface rolling on microstructure and properties of AZ91 magnesium alloy

2019 ◽  
Vol 29 (7) ◽  
pp. 1424-1429 ◽  
Author(s):  
Xian LUO ◽  
Qi-yang TAN ◽  
Ning MO ◽  
Yu YIN ◽  
Yan-qing YANG ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Az91 Magnesium Alloy ◽  
Microstructure And Properties ◽  
Deep Surface ◽  
Az91 Magnesium

Nanocrystalline Microstructure in AZ91 Magnesium Alloy Prepared with Cryogenic Treatment

2013 ◽  
Vol 575-576 ◽  
pp. 386-389
Author(s):  
Gui Rong Li ◽  
Hong Ming Wang ◽  
Yun Cai ◽  
Yu Tao Zhao ◽  
Jun Jie Wang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Cryogenic Temperature ◽  
Power Transmission ◽  
Volume Fraction ◽  
Cryogenic Treatment ◽  
Solution Treatment ◽  
Aging Treatment ◽  
High Volume ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

In order to make clear about the effect of cryogenic temperature on the microstructure evolution of alloy, the as-cast AZ91 magnesium alloy was subjected to the cryogenic treatment after solution treatment (415°C,5h) and aging treatment (190°C, 16h) with the protection of graphite power. Transmission Electron Microscope was utilized to characterize the microstructure of as-treated sample. The results show that a high volume fraction of nanocrystalline can be found in the treated alloys with the average sizes are about 55nm. The phenomenon highlights the importance of cryogenic temperature in forming nanostructures. During the continuous contraction of alloy the micro dynamic plastic deformation induces the generation, movement and accumulation of high-density dislocations that give rise to the formation of nanocrystalline during recovery and recrystallization.

Effects of Hot Extrusion and Heat Treatment on Mechanical Properties and Microstructures of AZ91 Magnesium Alloy

2012 ◽  
Vol 562-564 ◽  
pp. 242-245 ◽  
Author(s):  
Ming Tan ◽  
Zhao Ming Liu ◽  
Gao Feng Quan
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Magnesium Alloy ◽  
Solution Treatment ◽  
Annealing Treatment ◽  
Aging Treatment ◽  
Az91 Alloy ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

The effects of heat treatment on the microstructure, tensile property and fracture behavior of as-extruded AZ91 magnesium alloy were studied by OM and SEM. The results show that the grain of as-cast AZ91 alloy is refined by extruding and dynamic recrystallization, and the mechanical properties increase obviously. The ductility is significantly enhanced after solution treatment of the as-extruded AZ91 alloy, tensile strength is almost the same before and hardness is significantly reduced after solution treatment and artificial aging treatment. The tensile strength reduced and the ductility is significantly enhanced of as-extruded AZ91 magnesium alloy after annealing processes. The fracture surface of as-extruded AZ91 magnesium alloy has the mixture of ductile and brittle characteristic. But after T6 or annealing treatment, its dimple number increases evidently.

scholarly journals Effect of Modification on Microstructure and Properties of AZ91 Magnesium Alloy

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 536
Author(s):  
Andrzej Kiełbus ◽  
Robert Jarosz ◽  
Adam Gryc
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Magnesium Alloy ◽  
Volume Fraction ◽  
Az91 Alloy ◽  
Carbon Powder ◽  
Az91 Magnesium Alloy ◽  
Microstructure And Properties ◽  
Az91 Magnesium ◽  
Cast Magnesium

Refinement of α-Mg solid solution grains has a significant influence on the improvement of mechanical properties of cast magnesium alloys. In the article, the effects of three modifiers on microstructure and properties of AZ91 magnesium alloy casted to a sand mould were described. Overheating, hexachloroethane and wax-CaF2-carbon powder were applied. The research procedure comprised microstructure analysis by means of light microscopy, scanning electron microscopy and quantitative analysis with AnalySIS Pro® software and mechanical properties’ investigation. The microstructure of AZ91 alloy in the as-cast condition consists of α-Mg solid solution with precipitates of Mg17Al12, Mg2Si and Al8Mn5 phases. It was reported that all applied modifiers cause refinement of α-Mg solid solution grains and a decrease of the volume fraction of α-Mg+Mg17Al12 compound discontinuous precipitates. The best results were obtained in the case of wax-CaF2-carbon powder.

Effect of Magnetic Field Current on Microstructure and Properties of AZ91 Magnesium Alloy Welded Joint

2013 ◽  
Vol 690-693 ◽  
pp. 2570-2573 ◽  
Author(s):  
Yun Hai Su ◽  
Jin Liang Lin ◽  
Zhi Peng Kan
Keyword(s):  
Magnetic Field ◽  
Magnesium Alloy ◽  
Welded Joint ◽  
Alloy Element ◽  
Az91 Magnesium Alloy ◽  
Fine Crystal ◽  
Microstructure And Properties ◽  
Acting Mechanism ◽  
Az91 Magnesium ◽  
The Magnetic Field

In this investigation, in order to research the influence of magnetic field on microstructure and properties of magnesium alloy welded joint, the AZ91 magnesium alloy plates were welded by GTAW under AC longitudinal magnetic field. The tensile test, EDS and XRD were used to analyze the properties and microstructure of welded joint under different magentic field current. The acting mechanism of magentic field on welded joint was studied. The results show that, the optimal mechanical properties will be obtained when Im=1A, which the ultimate tensile strength is 270MPa and the elongation precentage is 7.1%.The magnetic field can produce electromagnetic stirring, which can refine crystal grain and improve the solubility of alloy element. The properties of welded joint will been improved by these fine crystal grain.

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