scholarly journals Study of Mechanical Properties of AZ91 Magnesium Alloy Welded by Laser Process Taking into Account the Anisotropy Microhardness and Residual Stresses by X-Ray Diffraction

2010 ◽  
Vol 42 (7) ◽  
pp. 1815-1826 ◽  
Author(s):  
A. Kouadri ◽  
L. Barrallier
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Residual Stresses ◽  
X Ray Diffraction ◽  
Az91 Magnesium Alloy ◽  
X Ray ◽  
Laser Process ◽  
Az91 Magnesium

Microstructure and Mechanical Properties of FeCrNiCoCu(B) High-Entropy Alloy Coatings

2011 ◽  
Vol 694 ◽  
pp. 502-507 ◽  
Author(s):  
Xiu Bing Liang ◽  
Wei Guo ◽  
Yong Xiong Chen ◽  
Lin Lei Wang
Keyword(s):  
Mechanical Properties ◽  
Arc Spraying ◽  
High Entropy Alloy ◽  
X Ray Diffraction ◽  
Az91 Magnesium Alloy ◽  
X Ray ◽  
High Entropy ◽  
High Velocity Arc Spraying ◽  
Az91 Magnesium ◽  
Electronic Microscope

Two kinds of high-entropy alloy coatings of FeCrNiCoCu and FeCrNiCoCuB were deposited on AZ91 magnesium alloy substrate using high velocity arc spraying technology. Microstructure and general mechanical properties of the coatings were investigated with Scanning Electronic Microscope (SEM), X-Ray Diffraction instrument (XRD), microhardness tester and strength bond tester. The results show that the two kinds of coatings exhibit compact layered microstructure and the phase lattice type are both FCC, the microhardness of the FeCrNiCoCu and FeCrNiCoCuB coatings are 414HV0.1 and 342HV0.1 respectively, the bond strength are 36.9 MPa and 33.6 MPa respectively.

Characterisation of Residual Stresses by X-Ray Diffraction of Laser Welded AZ91 Magnesium Alloy

2006 ◽  
Vol 524-525 ◽  
pp. 407-412 ◽  
Author(s):  
A. Kouadri ◽  
Laurent Barrallier
Keyword(s):  
Magnesium Alloy ◽  
Residual Stresses ◽  
Weld Zone ◽  
Weld Line ◽  
Welding Process ◽  
X Ray Diffraction ◽  
Az91 Magnesium Alloy ◽  
Magnesium Alloy Az91 ◽  
Az91 Magnesium ◽  
Kinetics Of

This study looks at the effect of laser welding on residual stresses in sheets of moulded magnesium alloy (AZ91). The modifications are significant even though they are localised along the weld line. The welding process produces a gradient of residual stresses from the weld line to the base metal and throughout the thickness of the weld zone. The distribution of these residual stresses has been qualitatively explained by the kinetics of cooling and by the nature of the multiphase material. Finally, it has been demonstrated that a pronounced crystallographic texture modifies local distribution of residual stresses. These results show that there is a complex coupling between the metallurgical, thermal and mechanical aspects generated by high power welding procedures.

Enhanced mechanical properties of AZ91 magnesium alloy by inoculation and hot deformation

2021 ◽  
Vol 802 ◽  
pp. 140667
Author(s):  
Mohammad Sajad Mehranpour ◽  
Ali Heydarinia ◽  
Massoud Emamy ◽  
Hamed Mirzadeh ◽  
Ali Koushki ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Hot Deformation ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

Effect of Ca and Sr Content on Elevated Temperatures Mechanical Properties of a Cast AZ91 Magnesium Alloy

2007 ◽  
Vol 26-28 ◽  
pp. 141-144
Author(s):  
Ippei Takeuchi ◽  
Kinji Hirai ◽  
Yorinobu Takigawa ◽  
Tokuteru Uesugi ◽  
Kenji Higashi
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Creep Resistance ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Tensile Tests ◽  
Az91 Magnesium Alloy ◽  
Additional Amount ◽  
Az91 Magnesium ◽  
Second Phases

The effect of Ca and Sr content on the microstructure and mechanical properties of a cast AZ91 magnesium alloy is investigated. Ca and Sr additions in AZ91 magnesium alloy are expected high creep resistance. The microstructure of the alloy exhibits the dendritic α-matrix and the second-phases forming networks on the grain boundary. Tensile tests at elevated temperatures between 448 and 523K reveal that the creep resistance was improved with increasing the additional amount of Ca, especially more than 1.0wt%. From the perspective of grain refinement effect, it is expected that the additions of Ca and Sr to AZ91 magnesium alloy not only improve creep resistance but also improve mechanical properties at room temperature.

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