Tag Archives | Transformation

Crystallographic Theory of Martensitic Transformation | Steel | Metallurgy

In this article we will discuss about the crystallographic theory of martensitic transformation in steels. In martensitic transformation in steels, the crystal lattice changes from FCC (austenite), to BCT (martensite). The parallel reference scratches (Fig. 3.45) on prepolished surface remain parallel, straight and continuous across the austenite-martensite interface after the transformation means homogeneous deformation must have taken place. The continuity [...]

By |2017-10-24T05:51:41+05:30October 24, 2017|Steel|Comments Off on Crystallographic Theory of Martensitic Transformation | Steel | Metallurgy
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Martensitic Transformation in Steels | Metallurgy

In this article we will discuss about:- 1. Introduction to Martensitic Transformation in Steels 2. Characteristics of Martensitic Transformation in Steels 3. Crystal Structure of Martensite 4. Crystallography 5. Thermodynamics 6. Reversibility. Contents: Introduction to Martensitic Transformation in Steels Characteristics of Martensitic Transformation in Steels Crystal Structure of Martensite Crystallography of Martensitic Transformation in Steels Thermodynamics of Martensitic Transformation in [...]

By |2017-10-24T05:51:41+05:30October 24, 2017|Steel|Comments Off on Martensitic Transformation in Steels | Metallurgy
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Martensite: Morphology and Modes | Steel | Metallurgy

In this article we will discuss about the morphology and modes of martensite. Morphology of Martensite: Martensitic transformation takes place by a combination of two shears-one of which is homogeneous lattice (shape) deformation (called pure strain). In steels, it may be taken as Bain strain. It is assumed to occur to achieve the new lattice of martensite from austenite. The [...]

By |2017-10-24T05:51:41+05:30October 24, 2017|Steel|Comments Off on Martensite: Morphology and Modes | Steel | Metallurgy
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Time Temperature Transformation (TTT) of Austenite | Metallurgy

In this article we will discuss about:- 1. Introduction to Time Temperature Transformation of Austenite 2. Types of Transformation 3. Types 4. Factors Effecting TTT Curves. Introduction to Time Temperature Transformation of Austenite: To appreciate the character of transformation of austenite, and the phases obtained, Davenport and Bain first introduced the isothermal transformation approach, and showed that by studying the [...]

By |2017-10-24T05:51:34+05:30October 24, 2017|Steel|Comments Off on Time Temperature Transformation (TTT) of Austenite | Metallurgy
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Bainite: Morphology and Characteristics | Steel | Metallurgy

In this article we will discuss about:- 1. Introduction to Bainite 2. Morphology of Bainite 3. Crystallography 4. Characteristics 5. Reaction 6. Applications. Contents: Introduction to Bainite Morphology of Bainite Crystallography of Bainite   Characteristics of Bainite Kinetics of Bainite Reaction Applications of Bainitic Steels 1. Introduction to Bainite: In 1930, Davenport and Bain were the first to report about bainite [...]

By |2017-10-24T05:51:34+05:30October 24, 2017|Bainite|Comments Off on Bainite: Morphology and Characteristics | Steel | Metallurgy
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Pearlite: Morphology, Crystallography and Effects | Steel | Metallurgy

In this article we will discuss about:- 1. Introduction to Pearlite 2. Morphology of Pearlite 3. Hull-Mehl Model 4. Experimental Characteristics 5. Diffusion of Carbon during Pearlitic Growth 6. Interlamellar Spacing, S0 7. Crystallography  8. Effects of Pearlite on Properties of Steels. Contents: Introduction to Pearlite  Morphology of Pearlite Hull-Mehl Model Nature of Nucleus in Pearlite Experimental Characteristics of Transformation [...]

By |2017-10-24T05:51:33+05:30October 24, 2017|Pearlite|Comments Off on Pearlite: Morphology, Crystallography and Effects | Steel | Metallurgy
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