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Perßon, Jörg
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article
Ni–Cr–Al Alloy for neutron scattering at high pressures
Abstract
<jats:p> High-pressure devices used in neutron scattering require materials with high strength, low neutron attenuation, and no activation. They should also be non-magnetic. Only very few materials fulfil these criteria. Here, it is reported on the manufacture and properties of the Ni–Cr–Al alloy (57.0 wt-% Ni, 40.0 wt-% Cr, and 3.0 wt-% Al). The casting and heat treatment to obtain the material with the optimal yield strength are described in detail. Synchrotron powder diffraction reveals that phases of the Ni<jats:sub>2</jats:sub>Cr, Cr, and Ni<jats:sub>3</jats:sub>Al types are present. Aging has no significant effect on their lattice parameters and volume fractions. The alloy has no magnetic order down to at least 1.9 K as evidenced by magnetic measurements and diffraction with polarised neutrons. </jats:p><jats:p> This paper is part of a Thematic Issue on The Crystallographic Aspects of Metallic Alloys. </jats:p>