MIE 201 Practice Exam 2 from fall _08

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

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

View Full Document Right Arrow Icon
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
Image of page 1

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

View Full Document Right Arrow Icon
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.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern