Introduction of phase diagram Hongqun Dong 2010.10.14 Introduction of phase diagram.

Slides:

Advertisements

Similar presentations

The thermodynamics of phase transformations

Advertisements

Acero 2000 PHYSICAL METALLURGY AND THERMAL PROCESSING OF STEEL

Chapter 9-15 The copper-zinc phase diagram: Terminal and Intermediate Solid Solutions Terminal solid solutions intermediate solid solutions Commercial.

Lecture 18Multicomponent Phase Equilibrium1 Thermodynamics of Solutions Let’s consider forming a solution. Start with X A moles of pure A and X B moles.

Mechanical & Aerospace Engineering West Virginia University Phase Diagram (1)

CHAPTER 8 Phase Diagrams 8-1.

Congruent and Incongruent Melting

Chapter 10 Phase Transformations in Metals (1)

Phase Any physically distinct, chemically homogeneous and mechanically separable portion of a substance Can be continuous or discontinuous Can be solid,

CENG151 Introduction to Materials Science and Selection Phase Diagrams Homework Solutions 2007.

Solidification of Pb-Sn Alloys Teri Mosher University of Illinois Advisor: Professor Krane.

CENG151 Introduction to Materials Science and Selection

Phase Diagrams Phase: A homogeneous portion of a system that have uniform physical and chemical characteristics. Single phase Two phases For example at.

Introduction to Materials Science, Chapter 9, Phase Diagrams University of Virginia, Dept. of Materials Science and Engineering 1 Development of microstructure.

EXPERIMENT # 9 Instructor: M.Yaqub

PHASE DIAGRAMS Phase B Phase A • When we combine two elements...

Chapter Outline: Phase Diagrams

MGI: Putting an End to Alloy Oops:* NEED DATA C. E. Campbell, U.R. Kattner, E. Lass, Metallurgy Division, NIST And Laura Bartolo, Kent State University.

Interactive experimentation and thermodynamic modeling

CENG151 Introduction to Materials Science and Selection

How to calculate the total amount of  phase (both eutectic and primary)? Fraction of  phase determined by application of the lever rule across the entire.

Lecture 9 Phase Diagrams 8-1.

Chapter 9 Phase Diagrams.

Thermodynamic data A tutorial course Session 8: Calculation of phase equilibria from critically assessed thermodynamic data Alan Dinsdale “Thermochemistry.

Copper (Cu) FCC nm atomic radii Silver (Ag) FCC nm atomic radii Mix 50% Ag + 50% Cu, gives two solid phases (  and  )  (saturated - mostly.

Thermodynamics Basic Review of Byeong-Joo Lee Microstructure Evolution

1. Chapter 09: Phase Diagram 2 Introduction Phase Diagrams are road maps.

Introduction to Materials Science, Chapter 9, Phase Diagrams University of Virginia, Dept. of Materials Science and Engineering 1 Growth of Solid Equilibrium.

Materials science I - Metallic materials Metallic materials Solid state atomic structure atomic arrangement microstructure macrostructure Pure materials.

Phase Field Modeling of Interdiffusion Microstructures K. Wu, J. E. Morral and Y. Wang Department of Materials Science and Engineering The Ohio State University.

Microstructure and Phase Transformations in Multicomponent Systems

PHASE DIAGRAMS THEORY AND APPLICATIONS. Some basic concepts u Phase A homogeneous region with distinct structure and physical properties In principle,

Thermodynamic data A tutorial course Session 4: Modelling of data for solutions (part 4) Alan Dinsdale “Thermochemistry of Materials” SRC.

Non-statistical thermodynamic optimization: an extravagance or a useful tool? Cong (Leo) Dai.

Outline: THERMOCALC program – various versions (other programes: MTDATA, FACTSAGE, PANDAT..) Database – pure metals, metalic solutions, intermetalics Macros.

Calculations of phase diagrams using Thermo-Calc software package Equilibrium calculation using the Gibbs energy minimisation 1. The Gibbs energy for a.

2. Materials Two compositions were investigated APS: within the immiscibility gap NoAPS: outside the immiscibility gap APS: 67SiO 2.11TiO 2.22BaO NoAPS:49SiO.

Thermo-Calc Software MGI – the challenges and opportunities for CALPHAD NIST Diffusion Workshop May 9 and 10, 2013 P K Mason Thermo-Calc.

Metallurgy of steel When carbon in small quantities is added to iron, ‘Steel’ is obtained. The influence of carbon on mechanical properties of iron is.

Summer School for Integrated Computational Materials Education 2015 Computational Thermodynamics Module Review Katsuyo Thornton, 1 Paul Mason, 2 Larry.

Thermodynamic data A tutorial course Session 6: Modelling Surface Tension Alan Dinsdale “Thermochemistry of Materials” SRC.

Fe-Carbon Diagram, TTT Diagram & Heat Treatment Processes

EBB 512 – Phase Diagram and Equilibria Lecture 1.

The Structure and Dynamics of Solids

Affect of Variables on Recrystallization

Analysis of DTA data for binary alloys

Metallurgy Background. Lesson Objectives When you finish this lesson you will understand: Phases of mater Crystal Structure & Crystal Defects Phase changes.

The role of phase transformation kinetics in phase diagram determination and assessment T-zero line, para-equilibrium.

The Thermochemistry Library THERMOCHIMICA Markus H.A. Piro, April 2014.

Chapter 17 Stability of minerals. Introduction Kinetics (the rate of reactions): Kinetics (the rate of reactions): –Reaction rates slow down on cooling.

 Austenite - The name given to the FCC crystal structure of iron.  Ferrite - The name given to the BCC crystal structure of iron that can occur.

Microstructure From Processing: Evaluation and Modelling Diffusional growth: Lecture 5 Martin Strangwood, Phase Transformations and Microstructural Modelling,

Chemical compositions of equilibrated phases One phase areas: the determination of the chemical composition of a single phase is automatic: it has the.

Phase diagrams of unary and binary systems

Material Science & Metallurgy Non Equilibrium Cooling

Chapter 5 Phase Equilibria

Metals & Alloys.

Katsuyo Thornton,1 Paul Mason,2 Larry Aagesen3

Phase diagrams by thermodynamic calculations

2/16/2019 9:54 PM Chapter 9 Phase Diagrams Dr. Mohammad Abuhaiba, PE.

Single solid phase binary alloy -1

CHAPTER 8 Phase Diagrams 1.

CHAPTER 8 Phase Diagrams 1.

Thermodynamic Properties

CHAPTER 8 Phase Diagrams 1.

Introduction to the Phase Diagrams MME 293: Lecture 05

Phase diagrams of pure substances

Mechanical Properties of Isomorphous Alloys

Katsuyo Thornton,1 Paul Mason,2 Larry Aagesen3

Presentation transcript:

Introduction of phase diagram Hongqun Dong Introduction of phase diagram

outline  Introduction  Application of the phase diagram  The method to build a phase diagram  experiments  CALPHAD approach  Challenge

Introduction  A phase diagram is a type of chart used to show conditions at which thermodynamically distinct phases can occur at equilibrium.  Common components of a phase diagram are lines of equilibrium or phase boundaries, which refer to lines that mark conditions under which multiple phases can coexist at equilibrium. Phase transitions occur along lines of equilibrium.

Application  Phase diagrams are the foundation in performing basic materials research in such fields as solidification, crystal growth, joining, solid-state reaction, phase transformation, oxidation, etc.  On the other hand, a phase diagram also serves as a road map for materials design and process optimization since it is the starting point in the manipulation of processing variables to achieve the desired microstructures.

examples The composition and melting temperature of the traditional SnPb solder can be directly obtained from the phase diagram

examples The upper temperature of homogenization treatment can be gained, besides, it can also show the solidification process of a certain alloy. x1

Determine the phase diagram  Metallurgy — needs a lot of alloying samples  Diffusion couple (two-phase couple, multi- components couple) — often used to determine the multi-component systems  measuring tools: EPMA, SEM, XRD (occasionally) equilibrium

CALculation of PHAse Diagrams — CALPHAD: common software  Thermo-Calc ( founder: B. Sundman )  Pandat ( founder: Y.A. Chang)  Lukas program ( founder: H.L. Lukas)  ChemSage ( founder: G. Eriksson)  FACT ( founder: W.T. Thompson)  MTDATA ( founder: A.T. Dinsdale)

General progress of CALPHAD approach

Rule to build the phase diagram

Some models  For solution phase (LIQUID, FCC, BCC, HCP …..)  ideal substitutional solution model  substitutional-regular solution model  associated model  quisi-chemical model  For IMCs  stoichiometry compounds ( Neumann-Kopp rule )  Compounds with the homogeneity range ( sublattice model )  Order-phase of the end member (depends ) Refs. H.L. Lukas, S.G. Fries and B. Sundman, Computational thermodynamics, Cambridge University Press, NY, 2007

Challenge  The fundamental experimental experiments are indispensable;  The accuracy of the outcomes deeply depend on the initial parameters inputted by users