Nanostructured Zr-based alloys-phase formation and mechanical properties

Citation
A. Gebert et al., Nanostructured Zr-based alloys-phase formation and mechanical properties, CHIN PHYS, 10, 2001, pp. S40-S44
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
CHINESE PHYSICS
ISSN journal
1009-1963 → ACNP
Volume
10
Year of publication
2001
Supplement
S
Pages
S40 - S44
Database
ISI
SICI code
1009-1963(200107)10:<S40:NZAFAM>2.0.ZU;2-T
Abstract
Newly developed nanostructured Zr/Ti-Al-TM multiphase alloys can provide a large bandwidth of interesting properties, such as mechanical properties. B ulk materials with nanocrystalline/ amorphous and (nano) quasicrystalline/ amorphous microstructure with different volume fractions of nanophases and with different grain sizes can be obtained by slowly cooling the melt as we ll as by solid state reactions. Multiphase structures are realized either b y partial devitrification of bulk glass-forming alloys or by defined additi on of inert compounds upon alloying. Special preparation techniques e.g. co pper mould casting and subsequent controlled annealing and mechanical alloy ing combined with hot consolidation of powders are described. The phase for mation and transformation processes and the thermal stability of such mater ials in dependence on alloy composition and processing parameters are discu ssed in detail. Currently, the exploration of properties with respect to po tential applications of these nanostructured alloys is still at the beginni ng. First investigations on the contributions of different phases/ volume f ractions to the overall mechanical behaviour will be shown. At room tempera ture, the deformation behaviour of amorphous/ crystalline bulk samples is g overned by contributions of all existing phases yielding a high strength of the material.