Results 201 to 210 of about 4,074 (233)

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 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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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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Theory of the martensitic phase transformations in lithium and sodium

Physical Review B, 1999
A phenomenological model is proposed which describes the static and dynamical properties observed in connection with the martensitic transformations in lithium and sodium. The martensite structure is shown to result from a coupling between the mechanisms associated with the $\mathrm{bcc}\ensuremath{-}9R,$ bcc-hcp, and bcc-fcc transformations.
O. Blaschko, V. Dmitriev, G. Krexner, P. Tolédano   +3 more
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The first-order phase transformation in NaCN: A martensite transformation

Journal of Applied Physics, 1983
The first-order phase transformation in NaCN at 288 °K is identified as a martensite transformation accompanied by the formation of mechanical deformation twins of the first kind. Photomicroscopy measurements of the crystal surface morphology and nuclear magnetic resonance measurements of the domain orientation are in agreement with the predictions of ...
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Martensitic phase transformation in single crystal Ni54Fe19Ga27

Solid State Communications, 2007
The single crystal Ni54Fe19Ga27 shows a martensitic transformation at 281 K on cooling and 283 K on warming. Large jumps in the temperature-dependent resistance curve, temperature-dependent magnetization curve and temperature-dependent thermal conductivity curve are observed at the martensitic transition temperature (TM). Negative magnetoresistance due
Chen, P., Zhang, X.X.
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Martensitic transformation of the Ni2Al phase in 63.1 at.% NiAl

Acta Metallurgica et Materialia, 1993
Electron diffraction and high resolution electron microscopy of 63.1 at.% NiAl have shown that the metastable hexagonal Ni[sub 2]Al precipitate, coherent in the B2 matrix phase, transforms concurrently with the martensitic transformation of the B2 NiAl matrix to the L1[sub 0] phase.
A.S. Murthy, E. Goo
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Martensitic transformations in NiMnAl β phase alloys

Metallurgical and Materials Transactions A, 1996
Martensitic transformation characteristics in a wide range of alloy compositions in the NiMnAl system have been investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The results indicate that while the NiMnAl alloys with relatively high Al and Mn contents transform martensitically ...
R. Kainuma, K. Ishida, H. Nakano
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Effect of Gb on Phase Transformation and Martensitic Phase Transformation in Ni–Mn–In Alloys

Advanced Materials Research, 2014
The Ni-Mn-In alloy occur martensite reverse phase transitions driven by magnetic field in a certain composition range, resulting in the macroscopic strain, and along with the output of up to 108 MPa stress. However, there are some defects impeded practical application of alloy, such as brittleness and low Curie temperature.
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Ultrasonic study of the martensitic phase transformation in sodium

Physical Review B, 1988
, Szente, , Trivisonno
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