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2015
The formation of martensite is characterized by its athermal transformation kinetics, crystallographic features, and development of fine structure. This chapter describes the diffusionless, shear-type transformation of austenite to martensite and how it affects the morphology and microstructure of heat-treatable carbon steels.
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The formation of martensite is characterized by its athermal transformation kinetics, crystallographic features, and development of fine structure. This chapter describes the diffusionless, shear-type transformation of austenite to martensite and how it affects the morphology and microstructure of heat-treatable carbon steels.
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An explanation of the “martensite start”-“martensite finish” temperature interval
Solid State Communications, 1982Abstract Packing together the domains of transformed and untransformed material after the start of a martensitic transformation produces stress, the equilibrium proportions of the two phases being governed by a stress-strain equation. This equation, however, relates the volume of transformed material to the fundamental order parameters of the ...
A. Okazaki, R.D. Lowde
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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. In
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Metallurgical Transactions A, 1976
Results concerning the crystal lattice of freshly formed martensite with abnormally low and abnormally high axial ratioc/a as well as the results of neutron diffraction studies of the positions of carbon atoms are reviewed. Mechanisms of the austenite to martensite transformation are considered, which can explain the formation of martensite with ...
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Results concerning the crystal lattice of freshly formed martensite with abnormally low and abnormally high axial ratioc/a as well as the results of neutron diffraction studies of the positions of carbon atoms are reviewed. Mechanisms of the austenite to martensite transformation are considered, which can explain the formation of martensite with ...
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Matériaux & Techniques, 2000
Les caracteristiques microstructurales et cinetiques de la transformation martensitique induite par deformation plastique de l'acier AISI 304 ont ete etablies par diffraction des rayons X en dispersion d'energie couplee aux analyses metallographiques au M.E.B.
H. Bargui, H. Sidhom, Z. Tourki
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Les caracteristiques microstructurales et cinetiques de la transformation martensitique induite par deformation plastique de l'acier AISI 304 ont ete etablies par diffraction des rayons X en dispersion d'energie couplee aux analyses metallographiques au M.E.B.
H. Bargui, H. Sidhom, Z. Tourki
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The martensitic transformation in stainless steels of the austenitic-martensitic class
Metal Science and Heat Treatment of Metals, 19601. Heating to 525–950°C after austenitizing at 1050°C reduces substantially the stability of austenite. Destabilization of austenite is explained by a depletion of the solid solution in chromium and carbon by chromium carbide precipitation. 2.
T. D. Kubyshkina +2 more
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Formal description of the initial propagation of martensite and the martensitic spread
Materials Science and TechnologyThis article analyses the spread of martensite nucleation in small particles and polycrystalline materials, considering the influence of thermal agitation on the diffusionless aspect of martensitic transformation. Henceforth, we propose a formal description of the initiation of the martensitic transformation supported by experimental data, which ...
José Roberto C. Guimarães +2 more
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2013
Abstract Martensitic steels are produced by quenching carbon steel from the austenite phase into martensite. This chapter provides information on the composition, microstructures, processing, deformation mechanisms, mechanical properties, hot forming, tempering, and special attributes of martensitic steels.
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Abstract Martensitic steels are produced by quenching carbon steel from the austenite phase into martensite. This chapter provides information on the composition, microstructures, processing, deformation mechanisms, mechanical properties, hot forming, tempering, and special attributes of martensitic steels.
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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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2003
Abstract Martensites are crystalline solids that display dazzling patterns at the microscopic scales. This microstructure gives rise to unusual macroscopic properties like the shape-memory effect. Starting with the crystalline structure, this book describes a theoretical framework for studying martensites and uses the theory to explain ...
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Abstract Martensites are crystalline solids that display dazzling patterns at the microscopic scales. This microstructure gives rise to unusual macroscopic properties like the shape-memory effect. Starting with the crystalline structure, this book describes a theoretical framework for studying martensites and uses the theory to explain ...
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