Results 231 to 240 of about 4,302 (276)
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On the nucleation of the martensite transformation
Nature, 1978THE 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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Isothermal martensitic transformations
Uspekhi Fizicheskih Nauk, 2005Martensitic 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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The thermodynamics of martensitic transformation
Metallurgical Transactions, 1971The thermodynamic approach to the understanding of martensitic transformations can provide insight into the mechanism of transformation, serve as a generalization technique among the alloying systems, and as a framework for the synthesis of data on kinetic, structural, crystallographic, and other aspects of the transformation.
J. S. Pascover, S. V. Radcliffe
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On Martensitic Transformation Cycles
International Journal of Materials Research, 1995Complete martensitic transformation cycles require subsequent full transformation into the low temperature phase (α M , martensite) and the high temperature phase (β or Υ, for Fe-alloys austenite). Cycles can be caused by changes in temperature alone, shear stress alone, or various combinations of both.
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Martensitic and “normal” transformations
Bulletin of the Russian Academy of Sciences: Physics, 2009An analysis of the experimental data shows that various structural kinetic forms of polymorphic transformations (from low-temperature athermal martensitic to high-temperature thermally activated “normal”) are due to the superposition of athermal lattice rearrangement (athermal martensitic transformation) and relaxation processes.
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Incompleteness of martensite transformations
Soviet Physics Journal, 1981The factors that lead to the retention of residual austenite below the temperature at the completion of the transformation are examined within the scope of the phenomenology based on the balance of motive forces in a martensite transformation.
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Martensitic Phase Transformations
1983AbstractThis chapter concentrates on very low-temperature martensitic transformations, which are of great concern for cryogenic applications and research. The principal transformation characteristics are reviewed and then elaborated. The material classes or alloy systems that exhibit martensitic transformations at very low temperatures are discussed ...
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On the Hysteresis in Martensitic Transformations
2003The paper proposes an explanation of the hysteresis in shape memory alloys using energy minimization in nonlinear elasticity and the entropy criterion. The stored energy has two wells describing the two phases. At elongations from some interval, the minimum energy is realized on two-phase mixtures.
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