High-temperature tensile properties and deformation mechanism of polycrystalline magnesium alloys with specifically oriented columnar grain structures

2018 ◽  
Vol 729 ◽  
pp. 300-309 ◽  
Author(s):  
Sheng-shi Zhao ◽  
Xiao-ping Lin ◽  
Yun Dong ◽  
Yi Niu ◽  
Dan Xu ◽  
...  
Keyword(s):  
High Temperature ◽  
Tensile Properties ◽  
Magnesium Alloys ◽  
Deformation Mechanism ◽  
Grain Structures ◽  
Columnar Grain ◽  
High Temperature Tensile ◽  
High Temperature Tensile Properties

High Temperature Tensile Properties of Mg-5Li-3Al-1.5Zn-2RE Alloys

2012 ◽  
Vol 182-183 ◽  
pp. 189-193
Author(s):  
Ting Qu Li ◽  
M. Gao ◽  
S.H. Wang ◽  
Zhan Yi Cao
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Tensile Properties ◽  
Deformation Mechanism ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Fracture Elongation ◽  
Dominant Deformation Mechanism ◽  
High Temperature Tensile ◽  
High Temperature Tensile Properties

In this paper, the high temperature tensile properties of the LAZ532-2RE alloy prepared by hot extruded processing after vacuum casting was investaged. The tensile properties of the extruded LAZ532-2RE alloy specimens were tested at different temperature with different strain rate. The microstructures near the fractured surfaces were observed using microscope in order to investigate the dominant deformation mechanism. The activation energy was calculated to explain the high temperature deformation mechanism. The result indicated that the strength of LAZ532-2RE alloy was high at the temperature range from 398K to 423K. Meanwhile, the fracture elongation of the alloy reaches 121% at 523K under strain rate 1×10-3s-1.

Effect of CaO Addition on High Temperature Tensile Properties of Mg Casting Alloys

2009 ◽  
Vol 620-622 ◽  
pp. 291-294 ◽  
Author(s):  
Jung Ho Seo ◽  
Shae K. Kim
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Tensile Properties ◽  
Alloy Element ◽  
Good Effect ◽  
Casting Alloys ◽  
Ca Addition ◽  
High Temperature Tensile ◽  
High Temperature Tensile Properties ◽  
Better Than

The microstructure, hardness and tensile properties of Mg-3Al, Mg-3Al-1.2Ca(AX31), Mg-3Al-1.2CaO(AO31), Mg-9Al, Mg-9Al-1.2Ca(AX91) and Mg-9Al-1.2CaO(AO91) alloys were investigated to identify the effect of CaO addition compared with Ca addition. The results show that the alloy element CaO has a good effect on high temperature tensile properties and CaO added alloys have superior high temperature performance compared with Ca added alloys. Addition of CaO results in the precipitation of Al2Ca phase (C15 phase) on the grain boundaries. This phase precipitated by the reduction of CaO leads to the refinement of a microstructure and improvement of tensile properties at elevated temperature similar to the Ca added Mg alloys. When added into molten Mg Ca makes solid solution in the Mg matrix up to 0.8wt %. But in case of CaO addition the thermally stable compound is precipitated directly without making solid solution with Mg matrix. Therefore, the high temperature tensile properties of CaO added Mg casting alloys are better than Ca added one at the same adding contents (1.2wt.%).

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