Name (Print)_
Signature_
MSE 250
Professor Darrel Frear
NO CELL PHONES
Exam #1
September 27, 2017
4:35 5:50pm
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Problem I
/ 20
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Problem II
/ 12
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Problem III
/ 12
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Problem IV
/ 20
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Problem V
/ 16
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Problem VI
/ 10
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Problem VII
/ 10
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Total
/100
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Norm
Homework #5 Crystal: Unit Cells
SOLUTIONS
1. Determine the indices for the direction in the unit cell.
First find the tail of the arrow, this is the origin (circled below) The new origins are all circled below and
are color coordinated.
Then, label the ne
Homework # 9
Assigned 20 September
Solutions
1. What is the magnitude of the maximum stress at the tip of an internal crack with a
radius of curvature of 1.9x10-4mm and a crack length of 3.8x10-2mm when a tensile
stress of 140MPa is applied?
This problem
Homework #6 Crystal Planes
Solutions
1a) Draw the specified planes in the unit cells:
The black dot indicates the origin (O).
1b) Determine indices of these unit cell planes
The black dots show the origin (O).
2) Draw the atoms on the (1 0 0) plane for a
Homework #3 Solutions
Bonding and Properties
) (Callister 2.23) Determine the bonding energy for Molybdenum (Mo). The Tm for Mo is 2617C.
Method: Make a plot of the bonding energy for the metals in Table 2.3 as a function of temperature.
The goal of this
Homework #7
Assigned 13 September
Solutions
1) a) Explain why metals are ductile and ceramics are brittle, in terms of their dislocation motion.
Dislocations move easily in metals, due to the delocalized bonding, but do not move easily in
ceramics due to
Homework # 8
Assigned 18 September
Solutions
1.
Tensile testing is one method by which we determine important mechanical properties of materials
like their tensile strength and stiffness. In the design of a component, you want to make sure that
the engine
Homework #4 Solutions
Crystal Structure Unit Cells
1. Callister Problem 3.9. Calculate the radius of a palladium (Pd) atom, given that Pd has an FCC crystal
structure, a density of 12g/cm2, and an atomic weight of 106.4g/mol .
Pd has an FCC crystal struct
Homework #1 Topic 0.0
1. Callister problem 1.1 Describe a material. (Your answers should be longer than this.)
Wind turbine blades: Materials used in wind turbine blades can include aluminum, steel, fiberglass
and woods. Researchers are also exploring, or
Homework #2 Bonding and the Periodic Table
1. Callister Problem 2.13 Atoms can be characterized by their electron configurations. Specifically, we
look at an atoms valence electrons to find out what kind of bonds that atom can make because material
proper
1.
1.
Chlorine- Halogen
Cobalt- Transition Metal
Krypton- Noble Gas
Potassium- Alkali Metal
Technetium- Alkali Metal
Magnesium- Alkaline earth metal
2. B
3. C
4. 0.373 % = Atomic %
5. With more C atoms added this increases the mass of the group and the ov
1. .138nm
2. 50% based on a 1:2 ration between cells
3.
a. 1 central atom(no face), 1 corner atom(1/8x8) 2 atoms in UC
b. body diagnal
c.4 radii
d.3
e.4r^2= d^2=d^2=d^2
f. 4r=sqrt3a
g.VUC=a^3
h. APF=.68
i. CN=8
4.
a. 3 face atoms(6x1/2), 1 corner atom (8x
1.
2.
1.C- Because different types of bonds are seen throughout all different materials and different
bonds have different properties too, which is important to understand.
2.B
3.B
4.E
3.
Airplane Wing-III-1-C-A
Airplane Seat Arm Rest-II-2-A-D
Airplane Co
1. LS1 (1997-2004 corvette) engine block
Block made entirely out of aluminum including the threads that are tapped
Aluminum is not as heavy as cast iron so the block saves weight, which is a crucial factor
when dealing with race cars.
The aluminum is s
Homework #1
Problem 1
Solar cells is a device that converts the suns energy into electricity. They are commonly
used where electrical power from a grid is unavailable (remote areas). A good example of their
use are satellites that are orbit around earth,
Exponential Population Growth Jessica Fratantoni: Lab 2's
.Asexual .Sexual
Even though we started with the same
number of lizards in both the asexually
and sexually reproducing populations,
the asexual population ended up with
considerably more lizards af
Asexual Female Lizard
@ Time: 00:36
Total Crickets Eaten: 9
Calories from Crickets: 450
Calories Used for Egg Production: 120
Calories Used to Reproduce: 190
Calories Used for BMR: 123
Total Calories Used: 433
Leftover Calories after Reproduction: 87
ono
Jessica Fratantoni
1.
Assign attractiveness scores to the first 20 faces of each sex on a scale from 1 10.
Male Or Female
Female #1
Female #2
Female #3
Female #4
Female #5
Female #6
Female #7
Female #8
Female #9
Female #10
Female #11
Female #12
Female #13
Jessica Fratantoni
Lab 8
I am currently in the process of fostering a puppy at my home in Tempe and named her
Lucy. This puppy is currently a female and is an eight-week old terrier mix. In todays society
most puppies are known to not be a complete purebr
Fratantoni 1
Jessica Fratantoni
Bio 112 (I-course)
Lab 3
24 January 2017
Observation for Earths inclination:
The 23.5-degree axial tilt of the Earth had many interesting observations. For starters, it was the
coldest temperature during the autumn and the
Jessica Fratantoni
Lab 5
February 9, 2017
The lizard in the video did 8 push-ups in 13 seconds. Having this information, you are to
figure out how many pushups the lizard could do in the allotted time of 30 minutes. Knowing
that there are 60 seconds in ea
Solutions To The Linear Diffusion Equation
Martin Eden Glicksman
Afina Lupulescu
Rensselaer Polytechnic Institute
Troy, NY, 12180
USA
meg/aol 02
Outline
Transform methods
Linear diffusion into semi-infinite medium
Boundary conditions
Laplace transfor
Crystal Growth
General Formalism
Phase growing into with velocity v :
v f k
f ( site factor ) : fraction of sites where a new atom
can be incorporated 0 < f < 1
: interatomic distance
k
: jump frequency
*at equilibrium temperature and ( T ) the net k mu
Thermodynamics of surface and interfaces (Gibbs 1876
-78)
J. W. Gibbs, collected works, Yale Univ. Press, New Haven, vol.1(1957), p. 219 ~ 331.
Define
:
Consider
to be a force / unit length of surface perimeter.
(fluid systems)
If a portion of the perim
Diffusion in Substitutional Alloys
In a binary substitutional alloy, the rate at which solvent (A) and solute (B)
atoms move into a vacant site is not equal, and each spices will have its own
diffusion coefficient, called the intrinsic diffusion coefficie
Simple Rate Equations
Consider a chemical reaction: A B
There are two common trends for the time rate of
change of the concentration, CA.
first order reaction kinetics
2
second order reaction kinetics
order refers to the exponent on CA and k is the ra
Kinetics of Nucleation
(a) i 1 1
ki 1
i
ki
(b) i 1 i 1
For eqn. (a)
Bimolecular reactions describing
flux of atoms into and out of i
sized-clusters
forward Rx
dni
kii ni 1
dt
backward Rx
dni
ki ni
dt
Writing a similar set of eqns. For (b) and combining
Description of Phase Transformation
(i) Equilibrium phase transformations occurring at the transition
temperature ( e. g. freezing at Tm)
(ii) Non-equilibrium phase transformations
(freezing below Tm)
Equilibrium phase transitions:
Recall the Ehrenfest (c