Copper alloys have many properties, which make them suitable in wide-ranging
applications in all the engineering industries. For the investigated alloys the most important
properties are hardness, strength and electrical conductivity. Precipitation hardenable alloys were
studied by Jominy end-quench test, in order to examine the change of hardness, electrical
conductivity and microstructure as a length of the test bar (i.e. cooling rate). In the first step samples
were solution treated at different temperatures, then water quenched followed by aging. Cold-work
after quench was applied in some alloys and improve in the properties was clearly seen. The
following Cu-alloys were investigated: Cu-Co-Ni-Be, Cu-2Be-Ni and Cu-2Ni-Be.
Cu-Hf-Al alloys are considered to be relatively new ones among Cu-based bulk amorphous alloys. Cu-Hf-Al alloys have high strength in amorphous state and this property makes many applications feasible for the industry. During the production of amorphous alloys the most important purpose is to produce them in the biggest diameter to make them suitable for a wide range of applications. The circumstances of the production process have a great influence on the developing structure.
In the present work solidification of Cu-Hf-Al alloys were investigated. The alloys were cast into different shapes with different Al contents with special regard to the appearance of the amorphous/crystalline structure. The appearance and the structure of crystalline phases were determined by X-ray diffraction and X-ray, DSC and metallographic measurements were used to investigate the developing structure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.