Results 271 to 280 of about 95,006 (332)
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Martensit und Metallographie / Martensite and Metallography
Practical Metallography, 2000Martensite and metallography were the two subject areas in which Hermann Schumann (1924 -1989) achieved great respect. An example of which is his work on y ↔ e -transformations, the fundamentals and technical exploitation of which he combined in the development of new materials [1]. This paper is dedicated to his memory.
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Martensitic transformations in alloys with martensite which ages
Metal Science and Heat Treatment, 19641. Molybdenum decreases the temperature interval in which martensite is formed in Fe+20% Ni alloys, while cobalt increases it. The additional elements investigated here affect the temperature interval of the martensitic transformation in the same way as that in steel. 2.
N. I. Karchevskaya, A. P. Gulyaev
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Steel Research International, 2019
The effect of martensite volume fraction on the mechanical and corrosion properties of low‐carbon dual‐phase steel is studied based on both step quenching (SQ) and intercritical annealing (IA) routes.
M. Soleimani, H. Mirzadeh, C. Dehghanian
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The effect of martensite volume fraction on the mechanical and corrosion properties of low‐carbon dual‐phase steel is studied based on both step quenching (SQ) and intercritical annealing (IA) routes.
M. Soleimani, H. Mirzadeh, C. Dehghanian
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Journal of Applied Physics, 1967
X-ray measurements cannot give a complete microscopic interpretation of the structure of carbon—iron martensite because of the broad diffuse diffraction lines. They show that the iron martensite has a body-centered tetragonal lattice on the average, but cannot give an exact picture of the distortion centers around the carbon atoms ...
H. Schechter +3 more
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X-ray measurements cannot give a complete microscopic interpretation of the structure of carbon—iron martensite because of the broad diffuse diffraction lines. They show that the iron martensite has a body-centered tetragonal lattice on the average, but cannot give an exact picture of the distortion centers around the carbon atoms ...
H. Schechter +3 more
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Martensitic Transformations in Bochum
Angewandte Chemie, 1989Conference Reports: Martensitic transformations are first order structural phase transformations which occur in a range of crystalline solids. A recent meeting in this field in Bochum, FRG, is reviewed by N. Jost while W. Kaysser reports that Las Vegas was the scene of a conference on particle technology.
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On the nucleation of martensite
Acta Metallurgica, 1980Abstract The heterogeneous nucleation of martensite at a dislocation is considered using an elasticity model. The dislocation is allowed to have an arbitrary Burgers vector representing, in an approximate manner, the stress field of a pile-up. It is found that an array of roughly 10 dislocations is required to nucleate martensite in the Fe-29 Ni ...
H.E. Cook, M. Suezawa
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On the formation of martensite
Materials Science and Engineering: A, 1990Abstract This paper provides arguments towards the resolution of the “nucleation dilemma” in the formation of martensite. The dilemma arises because there seens to be no direct connection between the inherent tendency towards instability of the body-centered parent phase as evidenced by partially soft phonons and the formation of a classical nucleus ...
Manfred Wuttig, Tetsuro Suzuki
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Acta Metallurgica, 1977
Abstract The symmetry of martensite is usually less than that of the related equilibrium phase—being a subgroup of both the parent crystal and the transformation strains. The attainment of the fuller symmetry is prevented by local or long-range ordering in the parent phase.
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Abstract The symmetry of martensite is usually less than that of the related equilibrium phase—being a subgroup of both the parent crystal and the transformation strains. The attainment of the fuller symmetry is prevented by local or long-range ordering in the parent phase.
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Relaxation Rotation during Martensitic Transformation and Scattering of the Martensite Texture
Doklady Physics, 2023In the our crystallographic theory of martensitic transformation, a new characteristic of martensitic transformation appears – a relaxation rotation, which was not in the generally accepted phenomenological theory of martensitic transformation. The relaxation rotation is necessary to obtain an invariant plane.
V. M. Gundyrev +2 more
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Surface Upheavals, Pseudo Martensite, and Martensite Ghosts
Practical Metallography, 2005Abstract A survey is made on the application of some metallographic methods for the analysis of martensitic reactions. In this context the following aspects are discussed: Reverse reactions can be martensitic, to restore faultlessly the austenite, not fully reversible (defects accumulate), or diffusion controlled.
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