Chapter 9: Solid Solution Alloys
Principles of the alloy class
Interstitial (e.g. IronCarbon system) Substitutional Hume-Rothery Rules
Phenomena related to solutions
Snoeck effect Cottrel (solute) atmospheres Solid solution hardening Yield point peaks
Chapter 8: Annealing
The whole idea is We can first bring materials to states of metastability
Free energy, G, is higher than the equilibrium There is a driving force, G, to proceed towards equilibrium There must be an energy barrier for doing so
Therm
MSE 3060 Fall 2016
Homework #8, Due Tuesday, Nov. 12 at the beginning of lecture
This homework set provides practice with the topics we have recently covered in Chapter 5 Strain,
Stress, and Elasticity and Chapter 7 Dislocations. You can find the full tex
MSE 3060 Fall 2016
Homework #7, Due Wednesday, Nov. 2 at 5 pm
This homework set will provide you with a chance to explore topics we covered in the chapter on Glide,
which is labeled as Ch. 6 in the revised edition and Ch. 7 Glide and Texture in the second
MSE 3060 Lectures 14
Tensors, Vectors, & Matrices
Logistics
Exam solutions review tonight 5pm, rm 200 in Wilsdorf Hall
HWK 5 posted, due Tuesday, normal office hours on Monday
Introduce tensors (read Ch. 4)
Why do we need them?
To describe anisotrop
Neumanns Principle (for a crystal with hexagonal symmetry): Show that the thermal expansion
tensor of crystals with tetragonal hexagonal symmetry only has 2 independent components. (Hint:
You can solve this one of two ways. a) You can perform transformati
1
MSE 3060: Structure and Defects of Materials
Final Exam
2:00 5:00, Thursday, December 10, 2015
1. This is a Closed Book, Closed Notes Exam
2. You may consult three 3x5 Index Cards or one 8 x 11 page of notes, formulae, or
physical constants.
3. Show all
1
MSE 306
Structure and Defects of Materials
Final Exam
Due 12noon Friday, May 8, 2009
1. This is a Closed Book, Closed Notes Exam
2. You may complete it in a take-home or in-class format as you please.
3. If you would like the luxury of asking questions
MSE 3060 Fall 2016 Homework Assignment 10
Due Monday, November 12th by 4pm
The quote of the day is from Nobel Laureate, Wolfgang Pauli.
God created the bulk, surfaces are the work of the devil!
Show all work and place final answers in a box (does not appl
Grading Policy: The objective is to fairly assess progress towards the goal of obtaining
sustainable knowledge of the course content.
1. Class participation (3%)
Asking questions if you have one, ask
Answering questions if asked, kindly respond
Attenda
Chapter 8: Annealing
The whole idea is We can first bring materials to states of metastability
Free energy, G, is higher than the equilibrium There is a driving force, G, to proceed towards equilibrium There must be an energy barrier for doing so
Therm
Chapter 7: Chemical Thermodynamics, Kinetics, & Statistical Mechanics
We will only do a BRIEF overview of these topics as they each constitute courses in themselves. However, our understanding of high temperature phenomena, such as annealing (Chapter 8)
Stereographic Projections
Concept: Reduce 3D information to 2D for presentation and calculation.
All features reduced by 1 dimension
Directions are represented by points. Planes are plotted as great circles or by their normal vectors (poles)
Stereograp
Introduction To Materials Science, Chapter 3, The structure of crystalline solids
Chapter 3 Outline How do atoms arrange themselves to form solids? Fundamental concepts and language Unit cells Crystal structures Face-centered cubic Body-centered cubic Hex
Structural and Chemical Characterization in Materials Science
Diffraction Techniques based upon.
X-rays Electrons TEM and SEM Neutrons wont discuss, but can be useful because of high penetration depths and because sensitive to magnetic structure.
Diffr
Why Stucture?
Properties! Phenomena! Example of wood Nearly one half of the course will focus explicitly upon it. Microstructure/Macrostructure Metallography artistic science
Mounting Grinding Polishing Etching Electropolishing
Bonds Between Neutral Atoms
Ionic bonding is simple to understand due the attraction of unlike charges and repulsion of like charges. Now we will consider 3 types of bonds between neutral atoms
van der Waals Covalent Metallic
Dipoles
-e1 a
e r +e2
A pa
Class Business
Return HWK #1 Solutions available in my office
Please review your problem areas in preparation for the exams
Toolkit homepage will be set up today or tomorrow: schedule, assignments, and some lecture notes will be posted.
In terms of pr
Burgers Circuit
To determine the Burgers vector Simple, confusing, important construct Requires convention (FS/RH)
Perhaps confusing because answer is not absolute, depends upon convention Important for determining reactions to applied stresses and disl
Preview
Dislocations have an elastic strain field surrounding them. We know approximately what the displacement field should be (based upon the Burgers vector), so we can calculate the strain field and resulting stress field. Given this stress field, the
Materials Structure
At some length scale, the assumption that materials may be represented as a continuum fails. In reality, materials are composed of atoms or molecules that are often arranged in a lattice (or crystal). Very frequently the materials we
Forces on Dislocations
We discussed forces due to line tension It seems that dislocations will experience a force due to applied stresses
T
F?
Consider a force, which performs work by causing a to sweep an area, A.
W = FA b = Ab; ( A = L ) W = f = bL F
Grain Boundaries
So far, our emphasis has been on single crystals We have discussed general crystallography and the diffraction techniques used to explore crystal structures.
We have also discussed some crystal defects
0-D Point defects (vacancies and
MSE 3060 Fall 2016 Homework Assignment 9
Due Tuesday, November 15th at the beginning of lecture
Show all work and place final answers in a box (does not apply to fully text-based answers). This HW is
designed to provide practice with key concepts from Chs