Results 131 to 140 of about 1,582,514 (178)
Diffusionless isothermal omega transformation in titanium alloys driven by quenched-in compositional fluctuations [PDF]
Physical Review Materials, 2019 In titanium alloys, the $\ensuremath{\omega}$(hexagonal)-phase transformation has been categorized as either a diffusion-mediated isothermal transformation or an athermal transformation that occurs spontaneously via a diffusionless mechanism. Here we report a diffusionless isothermal $\ensuremath{\omega}$ transformation that can occur even above the ...
Yasuyoshi Nagai +2 more
exaly +4 more sources
Diffusionless phase transformation characteristics of Mn75.7Pt24.3
Journal of Alloys and Compounds, 2014 Abstract Phase transformation, damping, and magnetic properties of a Mn 75.7 Pt 24.3 (at.%) alloy were characterized. It was observed that Mn 75.7 Pt 24.3 exhibits a stable phase transformation in the temperature range of 180–200 °C with a small temperature hysteresis and maximum transformation strain of ∼0.5%.
Noebe, R. D. +7 more
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Resolving the diffusionless transformation process of twinning in single crystal plasticity theory
International Journal of Plasticity, 2019 Abstract This paper outlines a single crystal plasticity theory for the mesoscale resolution of the diffusionless transformation process of deformation twinning. Unlike prevalent crystal plasticity models of lattice transformation that characterize volume fraction evolution of coexisting parent and product lattices at a material point, our model ...
C. Huang, K.I. Elkhodary, S. Tang
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Graphical Analysis of Diffusionless Phase Changes—the Cubic to Twinned Orthorhombic Transformation
Journal of Applied Physics, 1957A simplified method of calculating the crystallographic features of a diffusionless (martensitic) phase change is described and applied to the gold-cadmium alloy cubic-orthorhombic transformation. Use of the method requires a knowledge of the initial and final crystal structures and the specification of the crystallographic plane and direction of the ...
Lieberman, D. S. +2 more
exaly +3 more sources
New experimental evidence of the diffusionless transformation nature of bainite
Journal of Alloys and Compounds, 2013Abstract Since the discovery of bainite, research over many decades has revealed a substantial amount of information about the mechanism of the bainite transformation in steels. Elements of the theory are now routinely being used in many parts of the world in the design of novel alloys and in the interpretation of a variety of experimental data ...
Carlos García-Mateo +2 more
exaly +2 more sources
A postulate for diffusionless transformation in duplex FeMnAlC alloys
Scripta Metallurgica Et Materialia, 1990Study of a phase transformation of the kind BCC-to-18 R (51) 3 during water quenching of duplex Fe-Mn-Al-C alloys by means of the light microscopy (LM), scanning electron microscopy (SEM) and ...
J G Byrne
exaly +2 more sources
Diffusionless Tetragonal-Cubic Transformation Temperature in Zirconia-Ceria Solid Solutions
Journal of the American Ceramic Society, 1993Diffusionless tetragonal ( t′ ) cubic ( c′ ) phase transformation in 65‐mol%‐CeO 2 ‐ZrO 2 was investigated around the c′‐t ...
Masahiro Yoshimura
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Scripta Metallurgica, 1975
Abstract The results of recent X-ray and neutron studies of axial ratio anomalies associated with carbon atom distributions in the tetragonal martensite lattice are analyzed. This analysis shows that the C-atom distribution in freshly formed martensite is usually partly disordered except for some Al and high-nickel steels in which all the C-atoms are
A G Khachaturyan
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Abstract The results of recent X-ray and neutron studies of axial ratio anomalies associated with carbon atom distributions in the tetragonal martensite lattice are analyzed. This analysis shows that the C-atom distribution in freshly formed martensite is usually partly disordered except for some Al and high-nickel steels in which all the C-atoms are
A G Khachaturyan
exaly +2 more sources
Molecular dynamics simulation of diffusionless phase transformation in a quenched NiAl alloy model
Journal of Physics and Chemistry of Solids, 2003Abstract Interatomic potentials have great importance in the analysis and calculations of some parameters in atomic scale. These calculations are realised by the computer simulation techniques. In the present study, a molecular dynamics (MD) simulation method which allows the system to vary in shape and size was used for the investigation of ...
Soner Özgen, O Adiguzel
exaly +2 more sources
Effects of solute oxygen on kinetics of diffusionless isothermal ω transformation in β-titanium alloys [PDF]
Scripta Materialia, 2020 We have investigated the effects of solute oxygen on the kinetics of diffusionless isothermal omega (DI-ω) transformation in β-titanium vanadium alloys.
Tetsu Ichitsubo +2 more
exaly +3 more sources