Lecture

Phase Transformations: Fundamentals and Applications

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In course

MSE-302: Phase transformations

Ce cours est une introduction aux transformations de phases liquide-solide et solide-solide. Il aborde les aspects thermodynamiques et cristallographiques. Il traite principalement des matériaux métalliques, et établira des ponts vers les céramiques et la ...

Description

This lecture provides an introduction to phase transformations in materials science and engineering. It covers the fundamental concepts of phase transformations, including thermodynamics, phase diagrams, and the mechanisms of solidification and crystallization. The instructor discusses the classification of phase transformations into first and second order, highlighting their characteristics and examples. The lecture also delves into the Ising model to illustrate phase transitions and collective effects in materials. Additionally, it addresses the significance of phase transformations in various applications, such as memory materials and the mechanical properties of metals and alloys. The importance of understanding these transformations for the development of new materials is emphasized, along with the role of external conditions like temperature and stress in triggering these changes. Overall, this lecture serves as a foundational overview for students in materials science, providing essential knowledge for further studies in the field.

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Instructor

Cyril Cayron

1992-1995 Engineering School. Ecole des Mines de Nancy. 1994-1995 Master's degree in Materials Science (rank = 1st) 1995-1996 Military Service 1996-2000 PhD at EPFL-CIME. Precipitation in 6xxx alloys and composites. 2000-2014 Researcher, Engineer and Group leader on materials for new energies at CEA-Grenoble, France. 2012 Habilitation to supervise researches (HDR) 2014-now Senior Scientist at EPFL-LMTM Creator of the computer programs GenOVa and ARPGE (in Python). I currently work on crystallographic models of martensitic transformations and deformation twinning.

Official source

Related concepts (32)

Materials science

Materials science is an interdisciplinary field of researching and discovering materials. Materials engineering is an engineering field of finding uses for materials in other fields and industries. The intellectual origins of materials science stem from the Age of Enlightenment, when researchers began to use analytical thinking from chemistry, physics, and engineering to understand ancient, phenomenological observations in metallurgy and mineralogy. Materials science still incorporates elements of physics, chemistry, and engineering.

Thermodynamics

Thermodynamics is a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation. The behavior of these quantities is governed by the four laws of thermodynamics which convey a quantitative description using measurable macroscopic physical quantities, but may be explained in terms of microscopic constituents by statistical mechanics.

Laws of thermodynamics

The laws of thermodynamics are a set of scientific laws which define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium. The laws also use various parameters for thermodynamic processes, such as thermodynamic work and heat, and establish relationships between them. They state empirical facts that form a basis of precluding the possibility of certain phenomena, such as perpetual motion.

Metal

A metal (from Ancient Greek μέταλλον métallon 'mine, quarry, metal') is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets). These properties are the result of the metallic bond between the atoms or molecules of the metal. A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride.

Phase transition

In chemistry, thermodynamics, and other related fields, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter: solid, liquid, and gas, and in rare cases, plasma. A phase of a thermodynamic system and the states of matter have uniform physical properties. During a phase transition of a given medium, certain properties of the medium change as a result of the change of external conditions, such as temperature or pressure.

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