Special Issue "Fundamental Science and Applications of Highly Functional Alloys"
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: 28 March 2019
In the recent industry, high functional alloy materials with plural functionality are demanded. These characteristics are toughness, high ductility, super-elasticity, low thermal expansion, high durability, etc. As for materials that are used for actuators, oscillators, or transducers, further magnetic mechanical functionality is pursued in magnetic shape memory alloys. Articles about the recent progress of superalloys, invar alloys, shape memory alloy and other alloys that have high functionality are collected in this Special Issue. It is important to investigate a physical origin to expose the mechanisms of these characteristics, scientifically, to give further functionality to these materials. With applied technology, the articles of basic science using experimental theoretical considerations are raised.
Superally is a basically face-centered cubic austenitic alloy (fcc austenite). It possesses the characteristics of high mechanical strength, good surface stability, resistance to corrosion or oxidation, and excellent resistance to thermal creep deformation.
Invar alloy is an alloy notable for its uniquely low coefficient of thermal expansion. It is famous as FeNi36 (64FeNi), Inovco (Fe–33Ni–4.5Co), and FeNiCo alloys. The thermal expansion coefficient is less than 1 ppm/K. The coefficient is much smaller than that of normal metal, which is around 10 ppm/K. It is used on the part of the intense temperature change. The applications of Invar alloys are precision instruments such as clocks, seismic creep gauges, valves in engines of motorcars, antimagnetic watches, and large molds.
Shape memory alloys (SMA) have attracted a great deal of attention due to their attractive properties for applications, as well as their basic science of deformation and transformation in terms of structural and magnetic behaviors. A number of applications of shape memory alloys were achieved after Ti–Ni alloy was discovered in 1963 and developed extensively. SMA possesses super elasticity, 10–30 times superior than that of ordinary metal. Recently, ferromagnetic shape memory alloys (FSMA), Ni-Mn-Ga Ni-Mn-In, Ni-Mn-Sn and Ni-Mn-Sb Heusler alloy systems have been studied as candidates for highly-functional materials. These alloys are promising as SMA with a magnetic field-induced shape memory effect and as magnetocaloric effects.
This issue will be comprised articles reporting new and progressive research results, as well as reviews of particular classes of fundamental science of the alloys and their applied applications.
Prof. Dr. Takuo Sakon
Manuscript Submission Information
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- Invar alloy
- Shape memory alloy
- Dynamic functionality
- Magnetic functionality
- Thermal functionality
- Half metallic alloy
- Metal fatigue