The Brittle to Ductile Transition and the Transmission of Slip across Grain Boundaries in L12 Intermetallic Compounds

Schulson, E. M.; Baker, I.

doi:10.1007/978-94-011-2534-5_24

E. M. Schulson⁴ &
I. Baker⁴

Part of the book series: NATO ASI Series ((NSSE,volume 213))

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5 Citations

Abstract

It is argued that the improvement in the ductility of Ni₃Al, Ni₃Ga, Ni₃Si and Ni₃Ge through the addition of boron (in the ppm range) and of Zr₃Al through fast neutron irradiation is related to an increase in the transmission of slip across the grain boundaries. The transmittal mechanism is dislocation nucleation at the heads of pile-ups, and this is made easier through the disordering of the boundaries. The evidence supporting this view is reviewed. It is suggested that grain boundary disorder may be a general requirement for ductility.

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Thayer School of Engineering Dartmouth College Hanover, New Hampshire, 03755, USA
E. M. Schulson & I. Baker

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Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
C. T. Liu
Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK
R. W. Cahn
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Deutschland
G. Sauthoff

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Schulson, E.M., Baker, I. (1992). The Brittle to Ductile Transition and the Transmission of Slip across Grain Boundaries in L1₂ Intermetallic Compounds. In: Liu, C.T., Cahn, R.W., Sauthoff, G. (eds) Ordered Intermetallics — Physical Metallurgy and Mechanical Behaviour. NATO ASI Series, vol 213. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2534-5_24

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DOI: https://doi.org/10.1007/978-94-011-2534-5_24
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5119-4
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