Semisolid Processing and Its Application to Magnesium Alloys

2014 ◽  
pp. 223-226
Author(s):  
Frank Czerwinski
Keyword(s):  
Magnesium Alloys ◽  
Semisolid Processing

Semisolid Processing of Magnesium Alloys: Microstructure - Property Relationship

2014 ◽  
Vol 217-218 ◽  
pp. 3-7 ◽  
Author(s):  
Frank Czerwiński
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloys ◽  
Applied Research ◽  
Special Importance ◽  
Semisolid Processing ◽  
Microstructural Characteristics ◽  
High Affinity ◽  
Property Relationship ◽  
Research Activities ◽  
Reduced Temperature

An application of semisolid processing to magnesium alloys is discussed emphasizing both the fundamental and applied research activities aimed at better understanding the microstructure-property relationship. The reduced temperature of semisolid processing, providing common benefits of longer tool life, tighter dimensional tolerances and better process consistency is of special importance for magnesium alloys due to their high affinity to oxygen, requiring an expensive protection and leading otherwise to ignition and burning. However, the reduced temperature resulting in higher part integrity does not create beneficial microstructural characteristics converting to substantially improved mechanical properties. Major microstructural factors controlling properties of magnesium alloys after semisolid processing are discussed.

Heat Treatment of Magnesium Alloys – Current Capabilities

2013 ◽  
Vol 765 ◽  
pp. 466-470 ◽  
Author(s):  
Frank Czerwinski ◽  
W. Kasprzak
Keyword(s):  
Heat Treatment ◽  
Chemical Composition ◽  
Magnesium Alloys ◽  
Aging Effect ◽  
Strengthening Mechanisms ◽  
Semisolid Processing ◽  
Magnesium Matrix ◽  
New Approach ◽  
Current Heat

The essential factors controlling current heat treatment of cast and wrought magnesium alloys are reviewed along with the role of chemical composition and specific elements. The strengthening mechanisms and key precipitates are described, explaining crystallographic limitations of their role within the hcp magnesium matrix. Examples of changing properties are given for conventional alloys with trends in alloy design to magnify the aging effect. Emphasis is placed on magnesium structures produced by semisolid processing routes where a new approach to heat treatment is required.

Semisolid Processing of Magnesium Alloys: Progress and Limitations

2019 ◽  
Vol 285 ◽  
pp. 489-494 ◽  
Author(s):  
Frank Czerwinski
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloys ◽  
Tool Life ◽  
Industrial Applications ◽  
Semisolid Processing ◽  
Microstructural Characteristics ◽  
High Affinity ◽  
Reduced Temperature

An application of semisolid processing to magnesium alloys is described, emphasizing both the fundamental aspects and up-to-date successful industrial applications. The key advantages of the semisolid route are discussed, including longer tool life, tighter dimensional tolerances and better process consistency. The particular attention is paid to reduced temperature of semisolid processing, providing common benefits for magnesium alloys due to their high affinity to oxygen, requiring an expensive protection and leading otherwise to ignition and burning. Major microstructural factors controlling properties of magnesium alloys after semisolid processing are considered. It is concluded that although the reduced temperature results in higher part integrity, it does not create beneficial microstructural characteristics converting to substantially improved mechanical properties.

scholarly journals A Comparison Between Semisolid Casting Methods for Aluminium Alloys

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1368
Author(s):  
Anders E. W. Jarfors
Keyword(s):  
Magnesium Alloys ◽  
Aluminium Alloys ◽  
Current Paper ◽  
Semisolid Processing ◽  
Process Implementation ◽  
The World ◽  
Dominant Process ◽  
Semisolid Casting

Semisolid casting of aluminium alloys is growing. For magnesium alloys, Thixomoulding became the dominant process around the world. For aluminium processing, the situation is different as semisolid processing of aluminium is more technically challenging than for magnesium. Today three processes are leading the process implementation, The Gas-Induced Superheated-Slurry (GISS) method, the RheoMetal process and the Swirling Enthalpy Equilibration Device (SEED) process. These processes have all strengths and weaknesses and will fit a particular range of applications. The current paper aims at looking at the strengths and weaknesses of the processes to identify product types and niche applications for each process based on current applications and development directions taken for these processes.

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

2020 ◽  
Vol 17 (3) ◽  
pp. 8150-8159
Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Magnesium Alloys ◽  
Mechanical Performance ◽  
Fuel Efficiency ◽  
Research Work ◽  
Grain Structure ◽  
Tensile Fracture ◽  
Friction Stir ◽  
The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

Development of chemical hydrogen source based on magnesium alloys hydrides

2018 ◽  
pp. 27-31
Author(s):  
I.A. Gvozdkov ◽  
◽  
V.A. Belyaev ◽  
S.N. Potapov ◽  
V.N. Verbetsky ◽  
...  
Keyword(s):  
Magnesium Alloys
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