Effect of heat input of TIG repair welding on microstructure and mechanical properties of cast AZ91 magnesium alloy

2021 ◽  
Author(s):  
Abbas Assar ◽  
Bahram Nami ◽  
Nasrollah Bani Mostafa Arab ◽  
Iraj Khoubrou
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Heat Input ◽  
Az91 Magnesium Alloy ◽  
Repair Welding ◽  
Microstructure And Mechanical Properties ◽  
Az91 Magnesium

Effects of CaCO3 Modificator on Microstructure and Mechanical Properties of Cast AZ91 Magnesium Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 155-158
Author(s):  
Qu Dong Wang ◽  
Yang Zhao ◽  
Qing Hua Li
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Cleavage Fracture ◽  
Tensile Fracture ◽  
Az91 Alloy ◽  
Az91 Magnesium Alloy ◽  
Microstructure And Mechanical Properties ◽  
Reticular Structure ◽  
Az91 Magnesium ◽  
Alloy Increase

Effects of CaCO3 modificator on microstructure and mechanical properties of cast AZ91 Magnesium alloy have been investigated. Tensile fracture behavior of AZ91 alloys modified by CaCO3 has also been studied. Results show that CaCO3 modificator can obviously refine the grain of AZ91 magnesium alloy and Mg17Al12. Mg17Al12 in grain boundary of AZ91 alloy after modified by CaCO3 changes from continuous reticular structure to discontinuous reticular structure, even so much as granular structure and rod structure. After modified by 0.5wt% CaCO3 modificator, ultimate tensile strength, yield strength, impact toughness and elongation of AZ91 alloy increase from 186MPa to 200MPa, from 147MPa to 160MPa, from 4J to 9J and from 2.6% to 5%, respectively. And 0.5wt% CaCO3 modificator brings about an optimal refining effect. The study also shows that the fracture mechanism of modified AZ91 alloy is between cleavage fracture and quasi-cleavage fracture, which is as same as that of unmodified AZ91 alloy.

Microstructure and mechanical properties of AZ91 magnesium alloy subject to deep cryogenic treatments

2013 ◽  
Vol 20 (9) ◽  
pp. 896-901 ◽  
Author(s):  
Gui-rong Li ◽  
Hong-ming Wang ◽  
Yun Cai ◽  
Yu-tao Zhao ◽  
Jun-jie Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Az91 Magnesium Alloy ◽  
Microstructure And Mechanical Properties ◽  
Az91 Magnesium
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