1 1 Figure 10.1 Considerations for effective dispersion strengthening: (a) The precipitate phase should be hard and discontinuous. (c)2003 Brooks/Cole,

Slides:

Advertisements

Similar presentations

EQUILIBRIUM DIAGRAMS HAVING INTERMEDIATE PHASES OR COMPOUNDS

Advertisements

Chapter 10 – Dispersion Strengthening and Eutectic Phase Diagrams

Phase Diagrams Continued

L10B: Phases in equilibrium with one another: Composition and amount of each The temperature and pressure must be the same in each phase in equilibrium.

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

CHAPTER 8 Phase Diagrams 8-1.

Thermal Equilibrium Diagrams

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.

Phase Equilibria: Solubility Limit Sucrose/Water Phase Diagram Pure Sugar Temperature (°C) Co=Composition (wt% sugar) L (liquid solution.

CENG151 Introduction to Materials Science and Selection

Chapter 9: Phase Diagrams

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

INDUSTRIAL MATERIALS Instructed by: Dr. Sajid Zaidi

Phase Diagrams A phase is a state of matter with the following characteristics: It has the same structure or atomic arrangement throughout It has roughly.

Phase Diagrams Chapter 10.

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.

ENGR-45_Lec-22_PhaseDia-2.ppt 1 Bruce Mayer, PE Engineering-45: Materials of Engineering Bruce Mayer, PE Licensed Electrical &

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

Thermal Equilibrium Diagrams Contain information about changes that take place in alloys.

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.

Azizan Aziz School of Materials and Mineral Resources Engineering Binary Phase Diagrams Azizan Aziz Ph.D by.

Dispersion Strengthening by Heat Treatment Chapter 11a – 4 th Edition Chapter 12a- 5 th Edition.

Thermal Equilibrium Diagram

1 ISSUES TO ADDRESS... When we combine two elements... what equilibrium state do we get? In particular, if we specify... --a composition (e.g., wt% Cu.

Ex: Phase Diagram: Water-Sugar System THE SOLUBILITY LIMIT.

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

Chapter ISSUES TO ADDRESS... When we mix two elements... what equilibrium state do we get? In particular, if we specify... --a composition (e.g.,

CHE 333 Class 3 Phase Diagrams.. Why Phases? Few materials used in pure state – gold, copper, platinum etc for electrical properties or coatings. Most.

Phase Diagrams A phase is a state of matter with the following characteristics: It has the same structure or atomic arrangement throughout It has roughly.

Mechanical & Aerospace Engineering West Virginia University 9 – Phase Diagram (2) (Phase Reactions)

Chapter 8 Strain hardening and annealing

1 1  Phase - Any portion including the whole of a system, which is physically homogeneous within it and bounded by a surface so that it is mechanically.

Phase Diagrams And Microstructure

Phase Diagrams melting / production process / alloying (strength, Tm...) heat treatment microstructure material properties system (e.g. Cu-Ni) components.

EBB 512 – Phase Diagram and Equilibria Lecture 1.

Phase Diagrams Binary Eutectoid Systems Iron-Iron-Carbide Phase Diagram Steels and Cast Iron 1.

Phase Diagrams Chapter 9 4 th Edition Chapter 10 5 th Edition.

 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.

Dr. Owen Clarkin School of Mechanical & Manufacturing Engineering Summary of Material Science Chapter 1: Science of Materials Chapter 2: Properties of.

Chapter ISSUES TO ADDRESS... When we combine two elements... what is the resulting equilibrium state? In particular, if we specify the composition.

Dispersion Strengthening and Eutectic Phase Diagrams

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

Metallic Materials-Phase Diagrams

Material Science & Metallurgy Non Equilibrium Cooling

Materials Engineering

Dispersion Strengthening and Eutectic Phase Diagrams

Phase Diagrams 8-1.

Chapter 5 Phase Equilibria

Introduction to Materials Science and Engineering

© 2016 Cengage Learning Engineering. All Rights Reserved.

Chapter 4 Applications of Differentiation

Fully Miscible Solution

HYPOEUTECTIC & HYPEREUTECTIC

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.

CHAPTER 8 Phase Diagrams 1.

Working with Phase Diagrams

Eutectic Type Phase Diagrams

HYPOEUTECTIC & HYPEREUTECTIC

Rayat Shikshan Sanstha’s S. M. Joshi College, Hadapsar

T l s Full solubility liquid Phase diagram solid g(n) Gibbs Energy

Presentation transcript:

1 1 Figure 10.1 Considerations for effective dispersion strengthening: (a) The precipitate phase should be hard and discontinuous. (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license.

2 2 Figure 10.1 Considerations for effective dispersion strengthening: (b) The dispersed phase particles should be small and numerous. (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license.

3 3 Figure 10.1 Considerations for effective dispersion strengthening: (c) The dispersed phase particles should be round rather than needlelike. (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license.

4 4 Figure 10.1 Considerations for effective dispersion strengthening: (d) Larger amounts of dispersed phase increase strengthening. (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license.

5 5 Figure 10.6 The five most important three-phase reactions in binary phase diagrams.

6 6  Solvus - A solubility curve that separates a single-solid phase region from a two-solid phase region in the phase diagram.  Hypoeutectic alloy - An alloy composition between that of the left-hand-side end of the tie line defining the eutectic reaction and the eutectic composition.  Hypereutectic alloys - An alloy composition between that of the right-hand-side end of the tie line defining the eutectic reaction and the eutectic composition. Section 10.4 The Eutectic Phase Diagram

7 7 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure 10.8 the lead-tin equilibrium phase diagram.

8 8 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure 10.9 Solidification and microstructure of a Pb-2% Sn alloy. The alloy is a single-phase solid solution.

9 9 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure Solidification, precipitation, and microstructure of a Pb-10% Sn alloy. Some dispersion strengthening occurs as the β solid precipitates.

10 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure Solidification, precipitation, and microstructure of a Pb-10% Sn alloy. Some dispersion strengthening occurs as the β solid precipitates.

11 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure Solidification and microstructure of the eutectic alloy Pb-61.9% Sn.

12

13 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure The cooling curve for a eutectic alloy is a simple thermal arrest, since eutectics freeze or melt at a single temperature.

14 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure (a) Atom redistribution during lamellar growth of a lead-tin eutectic. Tin atoms from the liquid preferentially diffuse to the β plates, and lead atoms diffuse to the α plates. (b) Photomicrograph of the lead-tin eutectic microconstituent (x400).

15 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure The solidification and microstructure of a hypoeutectic alloy (Pb-30% Sn).

16 Example 10.5 Determination of Phases and Amounts in a Pb-30% Sn Hypoeutectic Alloy For a Pb-30% Sn alloy, determine the phases present, their amounts, and their compositions at 300 o C, 200 o C, 184 o C, 182 o C, and 0 o C.

17 Example 10.5 SOLUTION

18 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure The cooling curve for a hypoeutectic Pb- 30% Sn alloy.

19 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure The effect of the composition and strengthening mechanism on the tensile strength of lead- tin alloys.

20 (c)2003 Brooks/Cole, a division of Thomson Learning, Inc. Thomson Learning ™ is a trademark used herein under license. Figure 10.8 the lead-tin equilibrium phase diagram.