The diffusion region still mainly consisted of Ti[Al.sub.3] phase and intermetallics
Ti[Al.sub.2], TiAl, and [Ti.sub.3]Al formed in sequence in the diffusion front of Al.
Thus, hierarchical porous bimetals can be obtained through chemical dealloying of porous intermetallics
fabricated through Kirkendall effect.
"Formation and distribution of brittle structures in friction stir welding of aluminium and copper influence of shoulder geometry" Journal of Intermetallics
, 22: 122-128.
As a result of the severe mechanical deformation caused by the tool rotation effect, the majority of the coarse constituent particles that are present within the matrix alloy in random distribution are fragmented to finer and more uniformly intermetallics
within the weld nugget.
However, the potential of TiAl intermetallics
cannot be fully exploited if no proper technologies are available to fabricate engine components, for example, turbine blades.
The research team designed a series of tests using four different drills on three alloys to examine the effects of ferrous intermetallics
and free-cutting elements on the machinability, drilling force and torque, and how tool material affected tool wear and life.
The final phases, [Al.sub.2][O.sub.3] and [Fe.sub.3] Al intermetallics
, are formed by an in situ chemical reaction in which Al reduces the iron oxide [15, 16].
compounds, like [Mg.sub.2]Si, [Al.sub.2]Cu, and so forth, can form microgalvanic cells because of the difference of corrosion potential between intermetallics
and [alpha]-aluminum matrix.
Specific topics include the development and property evaluation of low-silicon aluminum casting alloys for thermal dissipation, the microstructural modeling of magnesium alloys and experimental validation, the design of a composite roll with internal cooling channels for twin-roll casting, high strength and high ductility in nanostructured aluminum-based intermetallics
produced by high-pressure torsion, and novel environmentally friendly coatings for aerospace alloys.
The process is ideal for the treatment of iron and steel-based materials; it can also be used for the treatment of many non-ferrous metals and their alloys, intermetallics
, cemented carbides, and cermets.
This joint venture (JV) will manufacture sintered NdFeB permanent rare earth magnets utilising the technology licensed from Intermetallics
Inc, a partnership between Mitsubishi, Daido and Dr.
formation and growth at the interface of Tin-based solder alloys and copper substrates.