Results 191 to 200 of about 33,276 (223)

Martensitic Phase Transformation

2020
This chapter provides a summary of basic knowledge on martensitic phase transformation in general and in steels, in particular. Besides the thermodynamic aspects of martensitic phase transformation, the different transformation path’s (direct γ to α’, direct γ to e, direct e to α’ and indirect γ to e to α’) occurring in steels are described in detail ...
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Weak martensitic transformations in bravais lattices

Archive for Rational Mechanics and Analysis, 1989
Considered are phase transitions of crystals from the point of view of their elastic properties. The typical example the author has in mind is the BCC-FCC phase transition (body-centured to face-centured cubic) observed in Iron and called precisely a martensitic transformation.
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Martensitic Phase Transformations

1983
AbstractThis 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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Martensitic transformation in nitinol

Metallography, 1985
Abstract Optical metallographic evidence is presented for the formation of martensite, and reversion of the martensite to the β phase in nitinol during thermal cycling and during shape memory behavior.
L.A. Middleton, N.F. Kennon, D.P. Dunne
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Martensitic and “normal” transformations

Bulletin of the Russian Academy of Sciences: Physics, 2009
An 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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Martensitic transformation under stress

Materials Science and Engineering: A, 2006
Abstract Thermodynamics considerations of martensitic transformation under stress are considered. The equation for dMs/dσ established by Patel and Cohen is discussed taking account of the grain size effect in polycrystalline materials, i.e. the orientation preference effect and the interaction between grain boundary and applied stress.
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Models for Martensitic Transformations

2009
Abstract This article assesses the evolution of martensite modeling in the changing materials engineering environment. It describes the physics of displacive transformations using Ginzburg-Landau theory, microstructure representation, dynamics and simulations, density functional theory, and shuffle transitions.
G.B. Olson, A. Saxena
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Hysteresis in martensitic transformations

Acta Metallurgica, 1967
Abstract The assumption that the product phase in a martensitic transformation inherits the defect composition of the parent phase is used to explain the hysteresis in martensitic transformation between equilibrium forms of a compound. In the case of a metal, the hysteresis is explained in terms of a dislocation mechanism for the transformation ...
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On Martensitic Transformation Cycles

International Journal of Materials Research, 1995
Complete 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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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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