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Mechanism of the TiNi Martensitic Transformation and the Crystal Structures of TiNi‐II and TiNi‐III Phases
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16.“Configuration” is taken to mean the structure in which atomic ordering is disregarded.
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18.Unless specified otherwise the Miller indices refer to the B2 structure.
19.Following the matrix vectorial notation, […] denotes a vector whereas 〈…〉 denotes a direction without magnitude.
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22.Method of casting a large ingot of TiNi has been devised by W. J. Buehler of this laboratory and has the U.S. patent pending.
23.Values obtained from Interatomic Distances (The Chemical Society, London, England, 1958).
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26.As stressed in the introduction, the B2 and P3̄m1 structures share a common “configuration” (i.e., differ only in atomic ordering); the coexistence of the two structures should not be taken to mean a coexistence of two phases.
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30.In fact, the statement “This would not be the case for a twinned relationship where martensites M in Fig. 3(c) would be able to be derived from martensite by a simple rotation about an axis normal to the figure…” by these authors to justify the nontwinning of the M and structures is itself incorrect. For example, a pair of optical isomer molecules which are mirror related to one another (equivalent to mirror twin) cannot be brought into one another through a simple rotation.
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33.Following Wang et al. (Ref. 25), the symbols and are those used by Kaufman and Cohen [Progress in Metal Physics (Pergamon, New York, 1958), Vol. 7] in their description of the martensitic transformation between austenites and martensites.
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36.This number, has recently been confirmed by Pace and Saunders (Ref. 37) who assumed the total energy change at the TiNi transformation to be largely due to the Fermi energy change.
37.N. G. Pace and G. A. Saunders, Phil. Mag. 22, 73 (1970).
38.The maximum work produced by such force has been measured by Cross et al. (Ref. 32) to be approximately
39.J. W. Christian, The Theory of Transformations in Metals and Alloys (Pergamon, Oxford, England, 1965).
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43.The notion that the “covalent” electronic state has to be stable in the low‐temperature phase and, conversely, the “metallic” state be stable in the high‐temperature phase is baseless. Consideration of the relative stability of the two electronic states should be made only on individual bases.
44.P. Ehrlich, Z. Anorg. Chem. 259, 1 (1949).
45.H. P. Rooksby, Nature 152, 304 (1948);
45.H. P. Rooksby, Acta Cryst. 1, 226 (1948).
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