Formation mechanisms of periodic longitudinal microstructure and texture patterns in friction stir welded magnesium AZ80

Hiscocks, Jessica; Diak, B.J.; Gerlich, A.P.; Daymond, Mark R.

doi:10.1016/j.matchar.2016.10.004

Cited by 8 publications

(3 citation statements)

References 36 publications

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“…As reported [22,23], (0002) basal texture often formed when Mg alloys underwent plastic deformation due to the hexagonal close-packed (HCP) structure. The basal texture had a significant effect on the mechanical properties of Mg alloys [24].…”

Section: Texture Variation During Smatmentioning

confidence: 70%

The effect of surface mechanical attrition treatment on texture evolution and mechanical properties of AZ31 magnesium alloy

Peng

Zhang

Guo

et al. 2019

Materials Characterization

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Section: Texture Variation During Smatmentioning

confidence: 70%

The effect of surface mechanical attrition treatment on texture evolution and mechanical properties of AZ31 magnesium alloy

Peng

Zhang

Guo

et al. 2019

Materials Characterization

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“…This would be extremely important to ensure that Mg-alloys are deployed in various industries due to good properties they possess. Currently, AZ 31 and AZ63 are the common Mg alloys due to their great mechanical Microstructural analysis [193] AZ91-D Welding speed: 90 mm/min; Tool rotation rate W: 120 RPM; Welding Pression: 1200 kN Effects: Excellent joints were produced at the optimal values indicated above and the effects were seen in the superior tensile properties it displayed. Furthermore, Experiments indicated that raising the welding speed (V) while maintaining the tool rotation rate (W) constant caused internal holes and a deficiency of bonding process owing to insufficient material flow.…”

Section: Discussionmentioning

confidence: 99%

Welding of magnesium and its alloys: an overview of methods and process parameters and their effects on mechanical behaviour and structural integrity of the welds

et al. 2021

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An overview of welding methods and process parameters and its effects on mechanical behaviour and structural integrity of magnesium and its alloys are discussed. These alloys are less dense and beneficial structural alloys for improved energy efficiency, eco-friendliness and driver of circular economic model for sustainable design and innovative ecosystem. While the application of Mg-alloys is projected to increase, understanding the mechanical behaviour and structural integrity of welded joints are critical. Thus, fusion and solid-state welding processes of these alloys are discussed with emphasis on mechanical characterization. Laser welding is the most effective fusion welding technique for most Mg alloys whereas, the predominant solid-state method is friction stir welding. The importance of process variables such as heat inputs, welding velocity (speed) and post weld treatments on the microstructural evolution, on mechanical and physical properties of the distinct zones of the weld joints are described. The weldment is the most susceptible to failure due to phase transformation, defects such as microporosity and relatively coarse grain sizes after solidification. The implication of the design of quality weld joints of Mg alloys are explored with areas for future research directions briefly discussed.

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“…Zn is an important alloying element in many Mg alloys [14,[21][22][23][24][25][26]. And addition of rare-earth elements in Mg alloys may improve their ductility and creep resistance [27,28].…”

Section: Introductionmentioning

confidence: 99%

Direct observation of solute interstitials and their clusters in Mg alloys

Yang

et al. 2017

Materials Characterization

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Individual solute interstitial atoms in Mg alloys were directly observed through aberration-corrected Z-contrast imaging. The atomic species and local positions of solute interstitials were further determined in combination of density functional theory calculations based on their formation energy. Individual octahedral and tetrahedral interstitials in hexagonal-close-packed Mg are Zn and Y, respectively. Interestingly, there are six positions around the center of each octahedral interstice, which can also accommodate a Zn interstitial, besides the ideal octahedral interstice. Y tetrahedral interstitials evolve to [0001] Y-Mg dumbbells. Moreover, an Y atom can form a crowdion between two neighboring Mg atoms along the <202 − 3> direction. In particular, small clusters consisting of various point defects were observed, providing direct evidence for enthalpy-driven clustering of point defects, which may have implications for atomic-scale understanding of nucleation mechanisms of strengthening precipitates.

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Formation mechanisms of periodic longitudinal microstructure and texture patterns in friction stir welded magnesium AZ80

Cited by 8 publications

References 36 publications

The effect of surface mechanical attrition treatment on texture evolution and mechanical properties of AZ31 magnesium alloy

The effect of surface mechanical attrition treatment on texture evolution and mechanical properties of AZ31 magnesium alloy

Welding of magnesium and its alloys: an overview of methods and process parameters and their effects on mechanical behaviour and structural integrity of the welds

Direct observation of solute interstitials and their clusters in Mg alloys

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