Microstructure Evolution of Zn-Al Cladding Fabricated on AZ31 Magnesium Alloy

2014 ◽  
Vol 1004-1005 ◽  
pp. 154-157
Author(s):  
An Sun ◽  
Xiao Ming Sui ◽  
Hai Tao Li ◽  
Qiang Wang
Keyword(s):  
Solid Solution ◽  
Chemical Composition ◽  
Microstructure Evolution ◽  
Element Concentration ◽  
Transverse Section ◽  
Eutectic Structure ◽  
Al Alloys ◽  
Magnesium Atom ◽  
Evolution Phase ◽  
Bonding Zone

The surface of AZ31 magnesium substrate is coated by Zn-Al alloys using cast-penetrated cladding. The transverse section of alloy cladding is composed of cladding zone, diffusional zone, and bonding zone. The microstructure evolution, phase constitution, and chemical composition of the transition layer are studied. The experimental results exhibit cladding zone contained dendrite matrix and interdendritic eutectic structures. The plume eutectic structure and columnar eutectic structure are formed in diffusional zone and bonding zone, respectively. Zn and Al solid solutions gradually decrease and disappear owing to the diffusion of magnesium atom and the changes of magnesium element concentration. Mg7Zn3 phases are generated rapidly due to the interdiffusion of zinc and magnesium atoms rapidly in the diffusional zone and bonding zone. As Mg-Zn eutectic phases hinder the movement of Mg and Al atoms, the Mg-Al intermetallic compounds are eliminated completely. The microstructure is transformed into Mg solid solution and Mg7Zn3 eutectic structure to combine with AZ31 base metal.

Microstructure evolution of YSZ/Al2O3 supersaturated solid solution

2021 ◽  
Vol 549 ◽  
pp. 149260
Author(s):  
Yongdong Yu ◽  
Yongting Zheng ◽  
Xudong Liu ◽  
Yuchen Yuan ◽  
Wanjun Yu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Microstructure Evolution ◽  
Supersaturated Solid Solution

scholarly journals Effect of chemical composition and quenching media on recoverable strain in Cu–Zn–Al alloys

2021 ◽  
Vol 12 ◽  
pp. 1368-1379
Author(s):  
Vanja Asanović ◽  
Dragan Radonjić ◽  
Jelena Šćepanović ◽  
Darko Vuksanović
Keyword(s):  
Chemical Composition ◽  
Al Alloys ◽  
Recoverable Strain ◽  
Quenching Media

Microstructure Evolution and Mechanical Properties of the Ni/Ni Soldered Joints

2011 ◽  
Vol 172-174 ◽  
pp. 863-868
Author(s):  
Anna Sypień ◽  
Andrzej Piątkowski ◽  
Paweł Zięba
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Chemical Composition ◽  
Microstructure Evolution ◽  
Fracture Behavior ◽  
Bulk Solder ◽  
Subsequent Aging ◽  
Brittle Phase ◽  
Edx Microanalysis ◽  
Solder Interface

The paper presents the results of studies on the microstructure, chemical composition and mechanical properties of the Ni/SnAuCu/Ni interconnections obtained due to the conventional soldering at 300 °C for different times and subsequent aging at 150 °C. The EDX microanalysis allowed to detect at the Ni/solder interface the (Ni,Cu,Au)3Sn4phase which transformed to (Cu,Ni,Au)6Sn5after longer time of soldering. In the central part of the interconnection AuSn4brittle phase was present. This phase was responsible for the significant decrease of the shear strength in the joints subjected to aging at 150 °C for 1000h, 1500 hours. The fracture behavior of such joints appeared to be caused partly by the coalescence of the microvoids in the bulk solder, cleavage of η-phase grains and decohesion at the interface.

Non-equilibrium Ti-Fe bulk alloys with ultra-high strength and enhanced ductility

2004 ◽  
Vol 851 ◽  
Author(s):  
Dmitri V. Louzguine-Luzgin ◽  
Larissa V. Louzguina-Luzgina ◽  
Hidemi Kato ◽  
Akihisa Inoue
Keyword(s):  
Solid Solution ◽  
Supersaturated Solid Solution ◽  
High Strength ◽  
Eutectic Structure ◽  
Solution Phase ◽  
Solid Solution Phase ◽  
Mechanical Fracture ◽  
Glassy Alloys ◽  
Fe Alloys ◽  
Bulk Alloys

ABSTRACTThe high-strength and ductile hypo-, hyper- and eutectic Ti-Fe alloys were formed in the shape of the arc-melted ingots with the dimensions of about 25–40 mm in diameter and 10–15 mm in height. The structure of the samples consists of cubic Pm 3 m TiFe and BCC Im 3 m β-Ti supersaturated solid solution phase. The arc-melted hypereutectic Ti65Fe35 alloy has a dispersed structure consisting of the primary TiFe phase and submicron-size eutectic structure. This alloy exhibits excellent mechanical properties: a Young's modulus of 149 GPa, a high mechanical fracture strength of 2.2 GPa, a 0.2 % yield strength of 1.8 GPa and 6.7 % ductility. The hard round-shaped intermetallic TiFe phase and the supersaturated β-Ti solid solution result in a high strength of the Ti65Fe35 alloy which in addition has much higher ductility compared to that of the nanostructured or glassy alloys. The reasons for the high ductility of the hypereutectic alloy are discussed.

scholarly journals Formation of Intermediate Phases and Supersaturated Solid Solution in Al-Cu System during Diffusion

2018 ◽  
Vol 383 ◽  
pp. 31-35 ◽  
Author(s):  
Alexey Rodin ◽  
Nataliya Goreslavets
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
High Temperature ◽  
Chemical Composition ◽  
Low Temperature ◽  
Supersaturated Solid Solution ◽  
Diffusion Processes ◽  
Equilibrium Phase ◽  
Equilibrium Phase Diagram ◽  
Intermediate Phases

The study of diffusion processes in the aluminum - copper system was carried out at the temperature 350 and 520 °C. Special attention was paid on the chemical composition of the system near Al/Cu interface. It was determined that the intermediate phases in the system, corresponding to the equilibrium phase diagram, were not formed at low temperature. At high temperature the intermediate phases forms starting with Cu - rich phases. In both cases supersaturated solid solution of copper in aluminum could be observed near the interface.

scholarly journals On solid solution in minerals; II, The chemical composition of analcite

1912 ◽  
Vol s4-33 (197) ◽  
pp. 433-439
Author(s):  
H. W. Foote ◽  
W. M. Bradley
Keyword(s):  
Solid Solution ◽  
Chemical Composition

Efficiency of Microstructure Refinement in Ti-Based Alloys

2021 ◽  
Vol 1016 ◽  
pp. 1753-1758
Author(s):  
Sergey Zherebtsov ◽  
Nikita Stepanov ◽  
Gennady Salishchev
Keyword(s):  
Plastic Deformation ◽  
Chemical Composition ◽  
Titanium Alloys ◽  
Microstructure Evolution ◽  
Large Plastic Deformation ◽  
Two Phase ◽  
Microstructure Refinement ◽  
Kinetics Of ◽  
Rate Type ◽  
Lamellar Type

The influence of various factors on the efficiency of microstructure refinement in two-phase titanium alloys with respect to a well-known Ti-6Al-4V alloy was discussed. The kinetics of microstructure evolution in titanium alloys with a lamellar type α/β microstructure during large plastic deformation depends mainly on temperature and strain rate, type of the initial microstructure, thickness of the α lamellae, path of deformation and chemical composition. Each parameter should be controlled to provide the most efficient microstructure refinement during conventional metalforming methods.

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