MAT 33 Fall 2011
Homework #5
1. The diffusion coefficients for Cu in Ni are given at two temperatures:
D (m2/s)
T (oC)
8.35 x 1016 1000
1.28 x1020
600
a) Determine the values of D0 and the activation energy Qd
b) What is the magnitude of D at 800C?
(a)
MAT 033 Engineering Ma Leriuls and Prucesses 200% Fall
Finnf Exam
December 15. 20:]:
NAME '
Section Profcssor Soukhnjak Th 12:11]
Prnfesmrickm Th :ID
mecssor Pearson F 3:13
Profcsser Pearsnn F 91f!
mecsmr than F 10:10
Plensa wrllt your nal answer
MAT 33 Fall 2011
Homework #5
Due: 10/03/11
1. The diffusion coefficients for Cu in Ni are given at two temperatures:
D (m2/s)
T (oC)
16
8.35 x 10
1000
20
1.28 x10
600
a) Determine the values of D0 and the activation energy Qd
b) What is the magnitude of
MAT 033 Engineering Materials and Processes 2011 Fall Final exam
Monday December 19, 8:0011:00 am
'eL Salem.
NAME Vion Soiuiroms w_ 3% 7

SCCtIOIl  Professor RlChllan Th pm I 
Professor Pearson Th 1: 10 pm
Professor Vinci
MAT33Fall2008Homework#5Solutions Due:10/06/08
1.) The diffusion coefficient of Ni in an austenitic stainless steel is 1022 m2/s at 500oC and 1015 m2/s at 1000oC. From this information, calculate the activation energy (in kJ/mol) for the diffusion
MAT 33 Fall 2011
Homework #10
1.) A hypothetical AB alloy of composition 55 wt% B45 wt% A at some
temperature is found to consist of mass fractions of 0.52 and 0.48 for the and
phases, respectively. If the composition of the phase is 20 wt% B80 wt% A,
wh
49.}:1'11: prom.55 of vulcanizaticm of rubbar developed by Goodyw [curls to :rnsslinki ng
when the rubber is mixed {and benign] with Juan! minimum and
a.) C!
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MAT 33 Fall 2011
Homework #10
Due: Dec./5/'11
1.) A hypothetical AB alloy of composition 55 wt% B45 wt% A at some
temperature is found to consist of mass fractions of 0.52 and 0.48 for the and
phases, respectively. If the composition of the phase is 20 w
MAT33 Engineering Materials and Processes Third Exam  Monday 18th December 2006 . Professor Pearson Th 12.10pm Professor Marder Th 1.10pm Professor Soukhojak Fr 8.10am Professor Soukhojak Fr 9.10am Professor Rickman Fr 10.10am . . . . .
Fall 2006
MAT 33 Fall 2008 Due: 11/24/08
Homework #9 Solutions
1.) Consider an 85 wt% Ag15 wt% Cu alloy in equilibrium at 800oC.
a.) What phase(s) is (are) present? b.) What is (are) the corresponding phase composition(s)? c.) What is (are) the relative
MAT 33 Fall 2007 Due: 10/15/07
Homework #5  Solutions
1.) The diffusivity of copper atoms in the aluminum lattice is 7.5 x10 13 m2/s at 600oC and 2.50 x 1015m2/s at 400oC. Calculate the activation energy in kJ/mol for this case in this temperat
MAT 33 Fall 2008 Due: 09/22/08
Homework #4  Solutions
1.) Calculate the number of vacancies per cubic meter in Au at 900oC. The energy for vacancy formation is 0.98 eV per atom. Furthermore, the density and atomic weight of Au are 19.32g cm3 and
MAT33Fall2008Homework#2solutions Due:08/09/08
1)
Calculatetheradiusofaniridiumatom,giventhatIrhasanFCCcrystal structure,adensityof22.4g/cm3,andanatomicweightof192.2gmol1.
ForFCC,n=4atoms/unitcell,andV = 16R 3 2 .Now, C nAIr = V N CA Andsolvingf
Tensile Strength, TS
Maximum possible engineering stress in tension.
TS
F = fracture or
ultimate
strength
engineering
stress
y
Typical response of a metal
Neck acts
as stress
concentrator
strain
engineering strain
Metals: occurs when noticeable necking
IronCarbon (FeC) Phase Diagram
T(C)
1600
L
1400
L Fe 3C
+
+L
A
1200
1148C
austenite)
Eutectoid (B):
R
Fe 3C 1000
+Fe3C
800
600
R
B
Result: Pearlite =
alternating layers of
and Fe3C phases.
C eutectoid
400
0
1
(Fe) 0.77
L+Fe3C
S
727C = eutectoid
T
Electrical Properties
ISSUES TO ADDRESS.
How are electrical conductance and resistance
characterized?
What are the physical phenomena that distinguish
conductors, semiconductors, and insulators?
For metals, how is conductivity affected by
imperfections
Final Monday 14th Dec : 7:00
10:00 pm
Please be seated by 7:00 pm sharp at Packard
Lab
101!
Quiz
is: (1) Closed book
(2)
Covers material from beginning of lecture
14
to the end of lecture 26 (Chapters 812)
(i.e. dislocation slip to electric
properties)
MAT 33 Engineering Materials & Processes
Spring 2017
INSTRUCTOR
Prof. J.M. Rickman
Office: Wh. 244
Phone: 7584236, email: jmr6@lehigh.edu
REQUIRED TEXT
W. D. Callister Jr. and D.G. Rethwisch, Fundamentals of Materials Science and Engineering: An
Integrat
MAT 033: Engineering Materials
and Processes
Course Objective.
Introduce fundamental concepts in Materials Science
You will learn about:
material structure
how structure dictates properties
how processing can change structure
This course will help you
MAT 33 Fall 2016
Homework #7
Due: 10/31/16
1 The yield stress for an iron that has an average grain diameter of 4.0 x 102 mm is
160 MPa. At a grain diameter of 2.2 x 103 mm, the yield stress increases to 450
MPa. At what grain diameter will the yield st
MAT 33 Fall 2016
Homework #9
Due: Nov./14/'16
1. A Cu20 wt% Ni alloy is slowly cooled from 1300C to 1100C.
A. (a) At what temperature does the first solid phase form?
(b) What is the composition of this solid phase?
(c) What is the composition of the liq
MAT 33 Fall 2016
Optional work
Due: Dec./5/'16
1. Use the AlNi phase diagram given below to answer following questions.
a) List one of peritectic reactions in this AlNi system
b) What is the atomic composition of the Al3Ni phase?
c) In the AlNi phase, a
MAT33Fall2016Homework#5
Due:10/3/16
1. Zircalloy is a zirconium alloy used to clad nuclear fuel. Diffusivity of oxygen in
zircalloy at 1000oC is 9.89 x 1013 m2s1; concentration of oxygen on the inside and
outside of the container are constant values of
MAT 33 Fall 2015
Homework #9
Due: Nov./16/'15
1. For alloys of two hypothetical metals A and B, there exist an , Arich phase, and a ,
Brich phase. From the mass fractions of both phases for different alloys, which are at
the same temperature, determine
MAT 33 Fall 2016
Homework #8
Due: 11/7/16
1. An aircraft component is fabricated from an aluminum alloy that has a fracture
toughness of 37.0 MPa/m1/2. It has been determined that fracture results at a stress of
500MPa when the maximum (or critical) inter
MAT 33 Fall 2016
Homework #6
Due: 10/24/2016
1.)
A cylindrical specimen of some metal alloy 12mm in diameter is stressed
elastically in tension. A force of 26,500N produces a reduction in specimen
diameter of 8.5 x 103 mm. Calculate Poissons ratio for th
MAT 33 Fall 2016
Optional work
Due: Dec./5/'16
1. Use the AlNi phase diagram given below to answer following questions.
a) List one of peritectic reactions in this AlNi system
b) What is the atomic composition of the Al3Ni phase?
c) In the AlNi phase, a
MAT 33 Fall 2016
Homework #10
Due: Nov./21/'16
1. The MgPb phase diagram is shown below.
1. What is the maximum solubility of Pb in ?
2. For what alloy composition are the equilibrium weight fractions and Mg2Pb
50 % (each) at T = 100oC?
3. Give the equat
MAT 33 Fall 2016
Homework #6
Due: 10/24/2016
1.)
A cylindrical specimen of some metal alloy 12mm in diameter is stressed
elastically in tension. A force of 26,500N produces a reduction in specimen
diameter of 8.5 x 103 mm. Calculate Poissons ratio for th
MAT 33 Fall 2016
Homework #8
Due: 11/07/16
1. An aircraft component is fabricated from an aluminum alloy that has a fracture
toughness of 37.0 MPa/m1/2. It has been determined that fracture results at a
stress of 500MPa when the maximum (or critical) inte
MAT 33 Fall 2016
Homework #9
Due: Nov./14/'16
1. A Cu20 wt% Ni alloy is slowly cooled from 1300C to 1100C.
A. (a) At what temperature does the first solid phase form?
(b) What is the composition of this solid phase?
(c) What is the composition of the liq
MAT 33 Fall 2016
Homework #10
Due: Nov./21/'16
1. The MgPb phase diagram is shown below.
1. What is the maximum solubility of Pb in ?
2. For what alloy composition are the equilibrium weight fractions and Mg2Pb 50 %
(each) at T = 100oC?
3. Give the equat