CEMM 260 Final Examination
May 7, 2008
No books or notes may be consulted during this examination
1. Ceramic structures
a. (10 points) The CsCl structure is a simple cubic structure with a = 2(R+r)/1.732, and
the NaCl structure is a fcc structure with a =

CME 260/261 Spring, 2011 Homework Assignment #1
1. Use the data table inside the front cover of Callister or another source of atomic
weights and densities to answer this question. A platinum wire is 0.8 mm in diameter
and 10 cm long. How many atoms does

16.10 For a continuous and oriented fiber-reinforced composite, the moduli of elasticity in the longitudinal and
transverse directions are 19.7 and 3.66 GPa (2.8 106 and 5.3 105 psi), respectively. If the volume fraction of
fibers is 0.25, determine the m

Ch. 4: Imperfections in Solids
4.1 Point Defects
4.2 Higher Order Defects
4.3 Microscopic Examination
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261: E. Karpov
1
Motivation
Actual crystal structure always have imperfections
Lattic

Ch. 5: Diffusion
5-1 Mechanisms, Steady-State Type
5-2 Nonsteady-State Diffusion
5-3 Factors of Diffusion
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261: E. Karpov
1
Basic Concepts
Diffusion: phenomenon of mass transport by atomic

Chapters 1&2:
1.1 Introduction to Materials
2.1 Atomic Structure
2.2 Interatomic Bonding
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261: E. Karpov
1
Historical Perspective
Materials history of
humankind
Stone Age
Bronze Age
Iro

CME 260
Mid-Term 1
07/08/15
Name: _
1. List four major classes of Materials (8 points)
Metals, ceramics, polymers, and composites
2. Calculate the percent ionic character of the following: (12 points)
a) GaAs
%IC = 1- exp [-(XA-XB)2/4] = 3.92 %
b) CH4
3.9

3.3
Show for the body-centered cubic crystal structure that the unit cell edge length a and the
atomic radius R are related through a =4R/ 3 .
Solution
Consider the BCC unit cell shown below
Using the triangle NOP
( NP) 2 = a 2 + a 2 = 2 a 2
And then for

CME 260
Review for Test #2
Spring 2014
Refer to Materials Science and Engineering an Introduction by William D. Callister, Jr.,
David G. Rethwisch, 9th Edition, 2014, John Wiley and Sons, ISBN- 9781-118-32457-8.
Chapter 8
Expect only qualitative questions

Homework assignment #5 Solution
9.8 Cite the phases that are present and the phase compositions for the following alloys:
(a) 90 wt% Zn-10 wt% Cu at 400C (750F)
(b) 75 wt% Sn-25 wt% Pb at 175C (345F)
(c) 55 wt% Ag-45 wt% Cu at 900C (1650F)
(d) 30 wt% Pb-7

Chapter 3:
3.1 Crystal Structures
3.2 Crystallographic Points, Directions &
Planes
3.3 Crystalline & Noncrystalline Materials
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261: E. Karpov
1
Basic Concepts I
Atomic bonding lead to
peri

Ch. 6: Mechanical Properties
6-1 Elastic Deformation
6-2 Plastic Deformation & Hardness
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261: E. Karpov
1
Mechanical Properties: Overview
Material response to forces of loads
Tensile loads

Ch. 7: Dislocation & Strengthening
Mechanisms
7-1 Dislocations and Plasticity
7-2 Strengthening Mechanisms
7-3 Recovery and Recrystallization
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261: E. Karpov
1
Overview
Elastic and plastic

9.10 Cite the phases that are present and the phase compositions for the following alloys:
(a) 15 wt% Sn85 wt% Pb at 100C (212F)
(b) 25 wt% Pb75 wt% Mg at 425C (800F)
(e) 1.25 kg Sn and 14 kg Pb at 200C (390F)
(f) 7.6 lbm Cu and 144.4 lbm Zn at 600C (1110

Homework 4 Chapter 5 & 6A 02/05/16
Due 02/12/16
5.15 Nitrogen from a gaseous phase is to be diffused into pure iron at 675C. If the surface concentration
is maintained at 0.2 wt% N, what will be the concentration 2 mm from the surface after 25 h? The diff

8.5 A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPa m (50 ksi in. ) is exposed
to a stress of 1030 MPa (150,000 psi). Will this specimen experience fracture if the largest surface crack is 0.5 mm
(0.02 in.) long? Why or

Homework 3
1/29/2016
Due 2/05/2016
3.76 The following table lists diffraction angles for the first three peaks (first-order) of the x-ray diffraction
pattern for some metal. Monochromatic x-radiation having a wavelength of 0.0711 nm was used.
(a) Determin

6.31 A specimen of magnesium having a rectangular cross section of dimensions 3.2 mm 19.1 mm ( 18 in.
3
4
in.)
is deformed in tension. Using the loadelongation data shown in the following table, complete parts (a) through (f).
Load
Length
lbf
N
in.
mm
0

Homework 2
1/22/2016
Due 1/29/2016
3.9 Calculate the radius of a palladium (Pd) atom, given that Pd has an FCC crystal structure, a density of
12.0 g/cm3, and an atomic weight of 106.4 g/mol.
3.35 Determine the indices for the directions shown in the foll

Homework 1 Chapter 2
1/15/16
Due 1/22/16
2.2 Silicon has three naturally occurring isotopes: 92.23% of 28Si, with an atomic weight of 27.9769 amu, 4.68% of
29
Si, with an atomic weight of 28.9765 amu, and 3.09% of 30Si, with an atomic weight of 29.9738 am

Week 12 (Ch. 12): Ceramics
12-1 Ceramic Structures
12-2 Mechanical Properties
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261 Fall 2012: E. Karpov
1
Preliminaries
Ceramic: inorganic nonmetallic materials
Electrically nonconductive

Week 11 (Ch. 11): Applications and
Processing of Metal Alloys
11-1 Metal Alloys Overview
11-2 Fabrication & Thermal Processing
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261 Fall 2012: E. Karpov
1
Types of Metal Alloys
Ferrous allo

Week 9 (Ch. 9): Phase Diagrams
9-1 Basic Concepts
9-2 Binary Diagrams
9-3 Iron-Carbon System
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261 Fall 2012: E. Karpov
1
Overview: Basic Concepts
Microstructure vary with T and P
Different

Weeks 7-8 (Ch. 8): Failure
7-1 Fracture
7-2 Fatigue
7-3 Creep
Eduard Karpov
University of Illinois at Chicago
CME Department
CME 261 Fall 2012: E. Karpov
1
Overview
Mechanical failure
Undesirable
How to avoid
Important concepts
Fracture: complete sep

Homework assignment #6
Spring 2013
Reading:
Focus on sections 9.18 and 9.19 of Chapter 9
Sections 10.1, 10.2, 10.5, 10.7, 10.8, and 10.9
Sections 11.7, 11.8, and 11.9 with a few other pages for definitions
Problems
9.49 What is the proeutectoid phase for

9.33 The microstructure of a lead-tin alloy at 180C (355F) consists of primary and
eutectic structures. If the mass fractions of these two microconstituents are 0.57 and 0.43,
respectively, determine the composition of the alloy.
Solution
Since there is a

CME261 Homework 1 Chapter 2
1/13/2017
Due 1/20/17
2.2 Silicon has three naturally occurring isotopes: 92.23% of 28Si, with an atomic weight of 27.9769 amu,
4.68% of 29Si, with an atomic weight of 28.9765 amu, and 3.09% of 30Si, with an atomic weight of
29

CME 261 Mid-Term
2/15/2016
Name:_
1. Please identify the following correlation: ( points)
_D_ A metal single crystal that splits
along (0001) plane
_C_ Bohr Atom
A) Conditions for substitutional solid
solution
B) Belongs to FCC crystal structure
_A_ Hume-