ME
MIE 201 Practice Exam 2 from fall _08

# MIE 201 Practice Exam 2 from fall _08 - Name MIE...

• Notes
• 5
• 100% (1) 1 out of 1 people found this document helpful

This preview shows pages 1–3. Sign up to view the full content.

Name _______________________________________ MIE Introduction to Materials, Fall ‘08 Exam #2 Answer all 5 Questions (Please keep your writing neat, use full sentences, and make the writing large enough so that it can be read.) Problem #1 a) Describe the difference between the substitutional and the interstitial mechanism for mass transport - diffusion in metals. b) Do these two mechanisms control mass transport – diffusion in 1) ceramics and 2) polymers? Explain your answers. c) Given the table of data below, which metal (iron - Fe, tungsten - W, or copper - Cu) has the highest self diffusion coefficient, D, at 950 o C. Explain your reasoning. Metal Melting Point ( o C) Crystal Structure σ y (MPa) K IC (MPam 1/2 ) Fe 1538 fcc 180 50 W 3410 bcc 522 80 Cu 1085 fcc 69 35

This preview has intentionally blurred sections. Sign up to view the full version.

Problem #2 a) Draw a typical true stress - strain curve, σ T vs ε T , for a metal. Indicate the yield point, and the point where necking takes place. b) Using this curve describe the process of strain hardening including the effect of dislocations. Describe the strain hardening relationship, σ T = K ( ε T ) n , where K and n are constants.
This is the end of the preview. Sign up to access the rest of the document.
• Spring '10
• GOLDSTEIN
• Materials Science, fcc bcc fcc, strain hardening relationship

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern