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Mechanical Properties and Structure of Cubic (Al,Cr)3 Ti Alloys

Published online by Cambridge University Press:  22 February 2011

J. P. Nic  and
D. E. Mikkola
J. P. Nic
Affiliation:
Dept. Metallurgical & Materials Engineering, Michigan Technological University, Houghton, MI 49931.
D. E. Mikkola
Affiliation:
Dept. Metallurgical & Materials Engineering, Michigan Technological University, Houghton, MI 49931.
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Abstract

Single phase LI2 (Al,Cr)3Ti alloys show no anomalous strengthening at intermediate temperatures, but the strength rises rapidly at low temperatures. It is likely that a transition from SISF to APB superdislocation dissociation occurs with increasing temperature based on the more rapid decrease in APB energy compared to SISF energy because of entropy considerations. High strain hardening rates are suggested to arise in large part from the formation of large numbers of dipoles. Calculations of interaction forces illustrate the complexity of superdislocation interactions and provide a reasonable mechanism for initiating cross slip.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1227
Copyright
Copyright © Materials Research Society 1995

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