Results 221 to 230 of about 14,153 (276)

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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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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Revealing orientation-dependent martensitic transformation in a medium Mn steel by micropillar compression

International Journal of Plasticity, 2019
In this contribution, for the first time, the effect of crystal orientation on the critical stress for martensitic transformation in a medium Mn steel is explicitly revealed by using micropillar compression experiments.
B B He, Hung-Wei Yen, M X Huang
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The simultaneous occurrence of martensitic transformation and reversion of martensite

Materials Science and Engineering: A, 2014
Abstract We use a 3D elastoplastic phase-field model to study the simultaneous occurrence of martensitic transformation as well as the reversion of martensite in steels under uni-axial tension. Our results show that although martensite nucleates and grows as a single lath (variant), it reverts and splits into two independent martensite laths, due to “
Yeddu HK, Lookman T, Saxena T
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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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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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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 nature of martensitic transformations

Materials Science and Engineering, 1979
Abstract Theoretical concepts are described which explain the structural and kinetic peculiarities of martensitic transformations. A martensitic transformation is considered as a first order phase transition in solids that proceeds under conditions where the initial phase maintains metastability.
A.L. Roitburd, G.V. Kurdjumov
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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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