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Mechanical Behavior of Single Crystalline A166.8Ti27.4Fe5.8

Published online by Cambridge University Press:  26 February 2011

Z.L. Wu ,
D.P. Pope  and
V. Vitek
Z.L. Wu
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, PA, 19104
D.P. Pope
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, PA, 19104
V. Vitek
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, PA, 19104
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Abstract

The operating slip systems and flow behavior of single crystalline A166.8Ti27.4Fe5.8 having the L12 structure were investigated at elevated temperatures using specimens with compressive axes near [001], [113], [112], [013] and [133]. Plastic deformation was carried exclusively by octahedral slip at low temperatures, and by both octahedral and cube slip at high temperatures. The yield stress is roughly temperature-independent at intermediate temperatures, but changes rapidly with temperature at high and low temperatures. At 770°C fracture occurs by cleavage on {011}, {001}, {013} and {111} planes. Al2Ti and AlTi3 were found in the single crystal matrix. The effects of these second phases on the mechanical behavior are not the same: Al2Ti does not embrittle the material but AlTi3 does.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 487
Copyright
Copyright © Materials Research Society 1991

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References

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