Abstract
The L12-structured intermetallic compound Zr3Al can be rendered amorphous easily by
several techniques. In the present study the structural evolution during high pressure torsion (HPT)
was investigated systematically by transmission electron microscopy (TEM) methods. Zr3Al
samples were deformed at room temperature to different grades of deformation up to shear strains
of 140 000%. TEM investigations revealed that the tendency to grain fragmentation, disordering
and the formation of a nanocrystalline structure is weak compared to other L12 ordered alloys like
Ni3Al. In addition, an amorphous phase has not been encountered. The present results differ
strongly from previous ones obtained from ball-milled materials. Possible reasons for the different
behavior are discussed on the basis of the temperature dependent dissociation scheme of the
superlattice dislocations gliding in Zr3Al.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
6 articles.
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