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Copper-Beryllium Microstructures

Published online by Cambridge University Press:  18 June 2020

Lee E. Tanner  and
David E. Laughlin
Lee E. Tanner
Affiliation:
Materials Research Center, Allied Chemical Corp., Morristown, NJ
David E. Laughlin
Affiliation:
Dept. of Metallurgy, Carnegie-Mellon Univ., Pittsburgh, PA
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Extract

Recently, the late R. Shiromizu carried out studies to establish the limits of metastability in the Cu-Be system. Con-currently, we engaged in parallel research, but with a broader emphasis on the microstructures concomitant with quenching, aging and reversion. A complete report covering 0.16 to 2.1 wt.% Be will be published elsewhere; certain unique structures are presented below.

Alloys of >0.8 wt.% Be quenched from the α (f.c.c.) region exhibit weak {110} tweed strain contrast. Direct lattice imaging did not detect discrete particles in this condition, whereas rather high densities of {100} G.P. Zone plates in regular stairstep array were revealed after aging at temperatures well below the G.P.Z. solvus.

Type
Phase Transformation and Identification
Information
EMSA Proceedings , Volume 33: Proceedings Thirty-Third Annual Meeting Electron Microscopy Society of America, Las Vegas, Nevada August 11-15, 1975 , 15 1975 , pp. 20 - 21
Copyright
Copyright © Claitor’s Publishing Division 1975

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