Ww. Park et al., EFFECTS OF ADDITIONAL ELEMENTS ON MICROSTRUCTURE AND PRECIPITATION BEHAVIOR IN RAPIDLY SOLIDIFIED AL-TI BASE ALLOYS, JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 12(3), 1996, pp. 195-198
Citations number
10
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Rapidly solidified Al-Tb base alloys were prepared by melt spinning at
the cooling rate about 10(7) K/s. The melt-spun ribbons were used to
observe the microstructures after heat treatment. In the supersaturate
d Al-Ti-Si alloy, age hardening occurred after 1 h anneal in the tempe
rature range of 400 similar to 500 degrees C, which seems to be attrib
uted to the precipitation of metastable L1(2)-(Al,Si)(3)Ti phase. Howe
ver, the microhardness was relatively low because of the low v/o and t
he insufficient stability of precipitates. Thus, Cr was added to Al-Ti
-Si alloys in order to stabilize the microstructures and to increase t
he v/o of precipitates. As a result, the alloys containing Cr were eva
luated to possess the improved properties at the service temperature.