314 Calcuiate the atomic radius in cm for the foliowing: (a) BCC metal with 00 2 0.3294 rim;
and (b) FCC metal with a0 = 4.0862 ix.
For BCC metals:
r = 1.426 x 108 cm
i" = (3.3294 mm = 0.1426 nm
For FCC metals:-
r = 1/;[
cfw_his is a straightforward use of Equation 9-1, however making it explicit in r is difficult
algebraically. instead a numerical solution using a spreadsheets goal seek function or
calculators SOLVE application is advised. The result will be 1.
78 A wing component on an aircraft is fabricated from an aluminum ailoy that has a piane
strain fracture toughness of 26 MPax/m'. It has been determined that the fracture
results at a stress of 112 MPa when the maximum internal crack length is 8.6 mm. For
10-32 Suppose 1 at% of the following elements is added to aluminum (forming a separate alloy
with each element) without exceeding the solubility limit. Which one would be expected
to give the higher strength ailoy? Why? (a) Mn; (b) Mg; (c) Cu; and (d) Zn.
12~3 Determine the constants c and n in Equation 122 that describe the rate of
crystallization of polypropylene at 140C. (See Figure 12w30.)
Premise immsformo if
10' 100 1009
Lid? llniii The. offset of temperature on the
11-11 A hypotheticai phase iagram is shown in Figure 1126. (a) Are any intermetallic
compounds present? If so, identify them and determine whether they are
stoichiometric or nonstochiometric. (b) Identify the sold solutions present in the
system. Is eithe
Problem Set 3
Chapter 7: Mechanical Properties
1. For a brass alloy, the stress at which plastic deformation begins is 345 MPa (50,000 psi), and the
modulus of elasticity is 103 GPa (15.0 10! ). (7.4)
a) What is the maximum load that may be appli
Why do we need to know anything
about how a solid material is structured
from the atomic scale?
We use materials in most applications
as bulk macroscale pieces of solid.
However, their inherent properties are
dependent upon their atomic
Materials for Engineers
Dr. Corral, Associate Professor
Materials Science & Engineering Department
August 26, 2013
Monday, September 2, 13
Studies have shown that better grades are
earned by students with good at
The method I am recommending for the toughness test of hot-pressed silicon nitride ceramics at room
temperature is the Chevron Notched Beam method. This material has a high fracture toughness value and
Chapter 6: Mechanical PropertiesrPart One
644 Calculate the maximum force that a 0.2in. diameter rod of Ai103, having a yield strength
of 35,000 psi, can withstand with no plastic deformation. Express your answer in lbs and
Solution: F a 5A., 2 (aspe
26 (a) Aiuminum foil Used for storing food weighs about 0.3 grams per square inch. How
many atoms of aiuminum contained in one square inch of the foil? cfw_b) Using the
densities and atomic weights given in Appendix A, calculate and compare the number of
8-6 Consider the tensile stress strain curves in Figure 8~20 labeled 1 and 2 and answer the
following questions. These curves are typical of metals. Consider each part as a separate
question that has no relationship to previous parts of the question.
MSE 331R Midterm Exam
October 9, 2000
0 The individual exam will be from 8:00-8:30AM. The group exam will be from 8230-8150AM.
0 Put your name on the top of this page.
0 Read all these instructions and the whole exam before you start.
MSE 311 Fall 2002
Readiness Test 2 Chapter 6 and 7
Mark X over your choice on the answer sheet
11. Which property
a. yield stress
does the tensile test not provide useful information on?
c. modulus of elasticity
12. What is the ef
MSE 331- Chapter 4 Solutions
4-5 The density of a sample of FCC palladium is 11.98 g/cm3, and its lattice parameter is 3.8902 . Calculate (a) the
fraction of the lattice points that contain vacancies; and (b) the total number of vacancies in a cubic
Chapter 16: Polymers
16-6 Kevlar (C14H10N202) is used in various applications from tires to body armor clue to its
high strength-tosvveight ratio. The poivmer is produced from the monomers
oaraphenvlene diamine (C6H8N2) and terephthaiovl chloride (C8H4Ci2
13-4 Calculate the amounts of ferrite, cementite, primary microconstituent, and pearlite in
the following steels: (a) 1015; (b) 1035; (c) lOElS; and (Ci) 10130.
Solution: cfw_3) 1015:
primary or m wx100 = 82.9% peariite m17.1%
Due: November 9th
Please answer the following questions briefly, clearly and concisely. Type your answers.
Part of your score is dependent on your ability to communicate your answer to the grader.
You can use whatever resource