An
interdisciplinary
field
that
addresses
the
fundamental
relationships
between
the
Processing, Structure and Properties
of materials and develops them for
the desired technological application
(Performance).
Stone Age (beginning of life 3000 BC)
Feature:
MSE 170, Fall 2012
Week 4 homework solutions
Assignment
5: 1, 3, 7
6: 4, 6, 25, 29
Solutions
5: 1 1 point
Briefly explain the difference between self-diffusion and interdiffusion.
Solution
Self-diffusion is atomic migration in pure metals-i.e., when all a
Problem I (20 points): 2. Pozm (Act.
Mark True (T) or False (F) for the following statements.
I. The electron conﬁguration of M” is l522522p°3d74s'. F
2. The equilibrium bond length between two atoms corresponds to the bond length when the net force
betwe
Lab IV: Work Hardening and Annealing of Brass
ABSTRACT
This paper described the effect of cold working on the mechanical properties of a brass strip by measuring the initial and final hardness. Moreover, the effect of cold working on the microstructure an
2.8 For the K shell, the four quantum numbers for each of the two electrons in the 1s state, in the order of
nlmlms, are 100 and 100(-). Write the four quantum numbers for all of the electrons in the L and M
shells, and note which correspond to the s, p,
MSE 170 hw solutions Ch 14-15
Ch 14: 11, 13, 22, 23
Ch 15: 5, 7, 14, 22
Chapter 14
14.11 Sketch portions of a linear polystyrene molecule that are (a) syndiotactic, (b)
atactic, and (c) isotactic. Use two-dimensional schematics per footnote 8 of this chap
9.53 Figure 9.37 is a portion of the copperaluminum phase diagram for which only single-phase regions
are labeled. Specify temperaturecomposition points at which all eutectics, eutectoids, peritectics, and
congruent phase transformations occur. Also, for
4.39 For an FCC single crystal, would you expect the surface energy for a (100) plane to be greater or
less than that for a (111) plane? Why? (Note: You may want to consult the solution to Problem 3.60 at
the end of Chapter 3.)
Answer
The surface energy f
CHAPTER 3
THE STRUCTURE OF CRYSTALLINE SOLIDS
Example PROBLEM and SOLUTIONS
Fundamental Concepts
3.1 What is the difference between atomic structure and crystal structure?
Solution
Atomic structure relates to the number of protons and neutrons in the nucl
8.1 What is the magnitude of the maximum stress that exists at the tip of an internal crack having a radius
of curvature of 1.9 104 mm (7.5 106 in.) and a crack length of 3.8 102 mm (1.5 103 in.) when a
tensile stress of 140 MPa (20,000 psi) is applied?
S
9.7 Given here are the solidus and liquidus temperatures for the coppergold system. Construct the phase
diagram for this system and label each region.
Composition (wt% Au)
Solidus Temperature (C)
Liquidus Temperature (C)
0
1085
1085
20
1019
1042
40
972
99
3.1 What is the difference between atomic structure and crystal structure?
Solution
Atomic structure relates to the number of protons and neutrons in the nucleus of an atom, as well as the
number and probability distributions of the constituent electrons.
MSE 170, Fall 2012
Week 5 homework solutions
Assignment
7: 5, 6, 7, 15, 25, 26, 35
8: 5, 13, 20, 31
Solutions
7: 5 0.5 points
(a) Define a slip system.
(b) Do all metals have the same slip system? Why or why not?
Solution
(a) A slip system is a crystallog
MSE 170
Midterm 02/13/15
100pts. Total
Exam is closed book, closed notes, closed neighbors.
Instruction:
1. Write your name and student ID on top of page.
2. Write legibly.
3. Show work as needed to justify answers.
4. Underline all final numerical answer
Chapter 3: Crystallographic directions and planes
Outline
Crystallographic directions
Crystallographic planes
Linear and planar atomic densities
Close-packed crystal structures
Crystallographic directions
Direction: a line between two points
and a v
MSE 170, Fall 2012
Week 2 homework solutions
Assignment
2: 14, 22
3: 5, 8, 13
12: 5, 7
Solutions
2: 14 2 points
The net potential energy between two adjacent ions, EN, may be represented by the sum of Equations 2.8
and 2.9; that is,
EN =
A
B
+ n
r
r
Calc
MSE 170 hw solutions Ch 11-12
Ch11: 3, 13, 30
Ch12: 39, 47
Chapter 11
11.3 What is the function of alloying elements in tool steels? (1 point)
Solution
The alloying elements in tool steels (e.g., Cr, V, W, and Mo) combine with the
carbon to form very hard
MSE 170, Fall 2012
Week 3 homework solutions
Assignment
3: 27, 28, 41, 45
4: 1, 4, 12
Solutions
3: 27 1 point
Draw an orthorhombic unit cell, and within that cell a [121 ] direction.
Solution
This problem calls for us to draw a [121 ] direction within an
Mechanical failure
How do flaws in a material initiate failure?
How is fracture resistance quantified; how do different
material classes compare?
How do we estimate the stress to fracture?
How do loading rate, loading history, and temperature
affect t
Polymers
Poly
mer
many
repeat unit
repeat
unit
repeat
unit
repeat
unit
H H H H H H
C C C C C C
H H H H H H
H H H H H H
C C C C C C
H Cl H Cl H Cl
Polyethylene (PE)
Polyvinyl chloride (PVC)
H
C
H
H H
C C
CH3 H
H H
C C
CH3 H
H
C
CH3
Polypropylene (PP)
Adapt
9.7 Given here are the solidus and liquidus temperatures for the coppergold system. Construct the phase
diagram for this system and label each region.
Composition (wt% Au)
Solidus Temperature (C)
Liquidus Temperature (C)
0
1085
1085
20
1019
1042
40
972
99
Mechanical failure
How do flaws in a material initiate failure?
How is fracture resistance quantified; how do different
material classes compare?
How do we estimate the stress to fracture?
How do loading rate, loading history, and temperature
affect t
9.53 Figure 9.37 is a portion of the copperaluminum phase diagram for which only single-phase regions
are labeled. Specify temperaturecomposition points at which all eutectics, eutectoids, peritectics, and
congruent phase transformations occur. Also, for
MSE 170 Midterm Study Sheet
Exam Date: Wednesday, January 28th, 2015
Exam is closed book, closed notes, closed neighbors.
Bring calculator and straight edge ruler.
Sample exams are available on the web page.
Equations needed, except those listed at bott
MSE 170 Midterm Study Sheet
Exam Date: Friday February 14th, 2015
Exam is closed book, closed notes, closed neighbors.
Bring calculator and straight edge ruler.
Sample exams are available on the web page.
Equations needed, except those listed at bottom,
~
9~.t .1;
J"'J.
f
ENGR/MSE 170B Final exam 12/13/00
(Total: 1OSpts)
Exam is closedbook
(Two sheetsof letter sizepaper allowed)
Instruction:
1. Placeyour nameand studentill on top page
2. Write legibly
3. Showwork asneedto justify answers
4. Circle all fm
ENGR/MSE 170 A Midterm (10/29/2012) Name:
100 points total
Student ID:
Problem 1 (20 points): Bonding and interatomic forces
a. (5 points) Referring to the periodic Table on last page, determine what are the predominant atomic
bondings for NaCl, SiC, H2O?
MSE 170 hw solutions Ch 9-10
Ch9: 3, 8, 14, 32, 33, 49, 50
Ch10: 9, 16, 20
Chapter 9
9.3 Cite three variables that determine the microstructure of an alloy. (0.5 point)
Solution
Three variables that determine the microstructure of an alloy are (1) the all
MSE170hwsolutionsCh16&18
Ch16:1,3,8
Ch18:1,7,21,28,30
Chapter16
16.1 The mechanical properties of aluminum may be improved by incorporating fine
particles of aluminum oxide (Al2O3). Given that the moduli of elasticity of these
materials are, respectively,