COARSENING BEHAVIOR OF L12 PRECIPITATES IN MELT-SPUN AL-TI-V-ZR ALLOYS

Aging studies of two melt-spun Al-2at.% (Ti,V,Zr) alloys showed that the would-be metastable L1(2) Al3(Ti,V,Zr) precipitates did not transform to stable D0(23) ones, and the average radius is 5-7 nm and the interparticle spacing is 20-40 nm at 698 K up to 400 h. The coarsening rate of spherical Al3(Ti0.2V0.4Zr0.4) precipitates was observed to be five times as fast as that of Al3(Ti0.1V0.4Zr0.5) precipitates. The coarsening behavior in both alloys obeyed the Lifshitz-Slyozov-Wagner (LSW) prediction well. Owing to the low coarsening rate and the high thermal stability of the precipitated phase, Al-Ti-V-Zr systems show promise as bases for high-temperature high-strength Al alloys.
Publisher
ELSEVIER SCIENCE SA LAUSANNE
Issue Date
1993-05
Language
ENG
Keywords

VOLUME FRACTION; HIGH-STRENGTH; KINETICS; DEPENDENCE; NUCLEATION; GROWTH; DO22

Citation

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.163, no.1, pp.81 - 90

ISSN
0921-5093
URI
http://hdl.handle.net/10203/57722
Appears in Collection
MS-Journal Papers(저널논문)
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