The ductile-brittle transition in meteoritic irons

Details The ductile-brittle transition in meteoritic irons The ductile-brittle transition in meteoritic irons

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974metic...9..209r&link_type=abstract

Meteoritics, vol. 9, Sept. 30, 1974, p. 209-213. Research supported by the Research Corp.

Computer Science

2

Brittleness, Ductility, Iron Meteorites, Tensile Tests, Transition Temperature, Asteroids, Face Centered Cubic Lattices, Mechanical Properties, Meteoritic Composition, Nickel

Scientific paper

Comment is made on the specimen preparation techniques used by Gordon (1970) and Auten (1973). It seems, from Auten's paper, that the tensile specimens were machined and then tested without further treatment of the specimen surfaces. As a result, the specimens had circumferential machining marks on them when they were tested. Attention is given to the mechanical properties of meteorites which are rich in nickel. These contain principally the face-centered cubic phase taenite. It is well known to specialists in the mechanical properties of metals and alloys that the face-centered cubic metals and alloys never exhibit a ductile-brittle transition. Therefore it is possible to predict with a high degree of certainty that the transition will not be observed in the ataxites.

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