Results 241 to 250 of about 9,095 (278)

Phase Transformation Crystallography of Lath Martensite

MRS Proceedings, 2006
AbstractOur current understanding of martensitic transformations has been based on the Phenomenological Theory of Martensite Crystallography developed in the 1950s. Recently, a Topological Model of martensitic transformations has been presented wherein the habit plane is a semi-coherent structure, and the transformation mechanism is shown explicitly to
Xiao Ma, R.C. Pond
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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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The martensitic transformation and the mechanical condition of phases

Metal Science and Heat Treatment, 1975
1. The cessation of the martensitic transformation in steel and the resumption of the transformation at lower temperatures depend on the change in the mechanical condition of the original phase (austenite) with a simultaneous change in the value of the thermodynamic stimulus of the transformation \3- the difference in free energies \gDFAM.
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Martensitic Transformations in β Phase Alloys

1975
CsCl type ordered phases occur frequently in equiatomic alloys. Two broad classes of these phases are recognized (1). The first, with by far the largest number of members, involves transition metals in which one component lies to the left and the other to the right of the chromium group.
S. Vatanayon, R. F. Hehemann
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Martensitic Phase Transformations in CuAlNi Shape Memory Alloys

Advanced Materials Research, 2012
The main deformation mechanism of shape memory alloys (SMA) is martensitic phase transformation (PT). To model martensitic phase transformations in such materials, several models have been developed. In the micromechanical model developed by Levitas and Ozsoy (2009), complete system of equations that describes evolution of stresses in phases and ...
Günel, I, Babacan, Nazım, Özsoy, İstemi Barış   +2 more
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Martensitic phase transformation and lattice dynamics of fcc cobalt

Physical Review B, 1996
The phonon dispersion of the high-temperature fcc phase of pure cobalt has been measured by inelastic neutron scattering at 833 K. Transverse phonon branches were measured above and below the Martensitic hcp-fcc transformation in order to learn about an influence of lattice dynamics, if any.
, Strauss, , Frey, , Petry, , Trampenau, , Nicolaus, , Shapiro, , Bossy   +6 more
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Phase transformations in metastable β′ CuZn alloys—I. Martensitic transformations

Acta Metallurgica, 1973
Abstract The shape strain, substructure, crystal structure, and orientation relationship of martensite formed in metastable β′ CuZn alloys has been investigated by optical and electron microscopy and electron diffraction. “Bulk” martensite plates in a Cu-38.4 wt.% Zn alloy were found to have a slightly distorted CuAu 1 structure; for such plates ...
I. Cornelis, C.M. Wayman
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Martensitic Phase Transform Ation

2003
Abstract We are interested in developing a continuum theory for materials that undergo the martensitic phase transformation. In particular, we are interested in understanding the origin and the nature of the microstructure that is observed in these materials. In this chapter, we introduce the basic concepts of the theory.
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Effect of disorder on the martensitic phase transformation in Nb3Sn

Applied Physics Letters, 1983
Specimens of Nb3Sn tape have been irradiated at ∼380 K with reactor-spectrum neutrons to fluences of 1.3×1019 n/cm2 (E>1 MeV) and the internal friction and dynamic Young’s modulus measured from 6 to 300 K. The softening of the lattice with decreasing temperature is seen to decrease from 40% of the room-temperature value at 10 K for unirradiated ...
C. L. Snead, H. Kumakura, M. Suenaga
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Martensitic Transformation as a Typical Phase Transformation in Solids

1978
Publisher Summary The chapter presents a discussion on martensitic transformation as a typical phase transformation in solids. Martensitic transformation is a polymorphic phase transition in solids consisting of the regular rearrangement of the crystal lattice, the constituent atoms of which do not interchange places.
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