Results 211 to 220 of about 1,684,077 (260)

The crystallography of martensite transformations II

Acta Metallurgica, 1954
Abstract The hypothesis advanced in Part I requires that the total strain in a martensite transformation be such that a twinning direction in the final structure lie in an unrotated plane and the twinning plane contain an unrotated line of the strain. From these conditions, together with the correspondence, and the dimensions of the initial and final
J.S Bowles, J.K Mackenzie
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Martensitic Transformations in Constrained Films

Journal de Physique IV (Proceedings), 2002
The evolution of martensitic microstructure and stress in a constrained film coupled with a substrate under cooling and heating is considered. Thermodynamic analysis has done using the special phase diagrams constructed in coordinates temperature-film/ substrate misfit.
A. L. Roytburd, J. Slutsker
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Thermodynamics of Thermoelastic Martensitic Transformations

Materials Science Forum, 1989
Abstract A fundamental thermodynamic equation is derived for thermoelastic martensitic transformations. It describes the mutual equilibrium between the two phases at every temperature and applied stress, taking into account internal interaction between domains, the existence of interfaces and dissipative effects associated with motion of boundaries ...
J. Ortín, A. Planes
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Fluctuationless mechanism for martensitic transformations

Physical Review B, 1993
A fluctuationless mechanism for martensitic transformations consisting of the appearance and development of a lattice instability triggered by defects is presented. A number of properties associated with martensitic transformations are qualitatively explained. As a quantitative example, the theory of the displacive \ensuremath{\beta}-\ensuremath{\omega}
, Vul, , Harmon
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The Martensitic Transformation in Cobalt

Journal of Applied Physics, 1967
The properties of the fcc to hcp transformation in cobalt single-crystal whiskers have been determined. Studies of the crystallographic properties and dislocation structure using optical, standard x-ray diffraction, and high-resolution x-ray diffraction topographic techniques are herein reported.
R. T. Johnson, R. D. Dragsdorf
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Martensitic transformations in alloys with martensite which ages

Metal Science and Heat Treatment, 1964
1. Molybdenum decreases the temperature interval in which martensite is formed in Fe+20% Ni alloys, while cobalt increases it. The additional elements investigated here affect the temperature interval of the martensitic transformation in the same way as that in steel. 2.
A. P. Gulyaev, N. I. Karchevskaya
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The martensitic transformation: mechanisms and crystallography

Philosophical Magazine A, 2002
Abstract The atom movements during the martensitic transformation are described by a combination of two shears: a long-wave primary and a secondary shuffle type shear which occur simultaneously. The primary and part of the secondary shear are equivalent to the Bain distortion, and the rest of the secondary shear corresponds to the lattice invariant ...
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On the nucleation of the martensite transformation

Nature, 1978
THE standard description of the austenite–martensite transformation includes the statement that once the material reaches the martensite start temperature, or below, then the transformation occurs immediately1. Hence, if a nucleus is present in the material, then growth occurs to an extent determined by the transformation temperature.
J. M. GALLIGAN, T. GAROSSHEN
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The martensite transformation

2004
Martensite is named after the German metallographer Adolph Martens who, in about 1890, was the first to describe its structure and formation.
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Isothermal martensitic transformations

Uspekhi Fizicheskih Nauk, 2005
Martensitic transformations have long been considered most characteristically athermal — in the sense that they develop, with changing temperature, at a tremendous temperature-independent rate and cease to occur at isothermal conditions. Over the past decades, however, isothermal martensitic transformations (IMTs), which develop at low temperatures for
Valentin A Lobodyuk, Emmanuil I Estrin
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