ISSN:
1573-4900
Keywords:
Intermetallics
;
Brittle fracture
;
Ductility
;
Dislocations
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Origins of the intrinsic and extrinsic brittleness of L12 intermetallics are analyzed. It is shown that the intrinsic behavior is determined by the dislocation process in the alloy, and that the extrinsic behavior is related to moisture-induced embrittlement. Converting DO22 structure to L12 structure does not necessarily yield a ductile alloy. To improve the intrinsic ductility, the alloying element must be able to change the bonding nature so that the glissile complex stacking fault-coupled dissociation of superdislocations is promoted, while an improvement in the extrinsic ductility might be achieved by partially replacing the light element in the alloy with a heavier alloying element.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008622503735
Permalink
