e4510lecture-1

e4510lecture-1 - J.W Morris Jr University of California...

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Unformatted text preview: J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring, 2010 Engineering 45: The Structure and Properties of Materials • Instructor: J. W. Morris Jr. 228 Hearst Mining Bldg. Tel: 642-3815 E-M: [email protected] Office hours: 2-3 pm Wed., 11-12 am Fri. • Web site: htpps://bspace.berkeley.edu • TA Office: 350 Hearst Mining (hrs. on site) J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring, 2010 Engineering 45: The Structure and Properties of Materials • Text: Bound lecture notes available at bookstore • Examinations (open book): – Midterm near Spring break – Final as scheduled • Homework: – Out Friday, due Friday 5 pm 350 HMB J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring, 2010 MSE 200A: Survey of Materials Science • Survey course that covers the field of Materials Science – “One mile wide, one inch deep” – Materials are treated in many courses; what is different here? • The scope of Materials Science – What the properties of materials are, but also – Why they are what they are • What is a “material”, anyway? – How they can be modified and controlled J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring, 2010 • The field can be summarized in two sentences: – Properties <= composition + microstructure – Microstructure <= composition + processing • Composition = kind and fraction of atoms present • Microstructure = How those atoms are arranged – Microstructure is not only essential to understanding properties – It is often much more important than composition – Example: endovascular stents from 316L stainless (Fe-Cr-Ni-Mo) • Self-expanding (hard in as-drawn condition) • Balloon-expanded (soft in annealed condition) The Essence of Materials Science J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring, 2010 Endovascular Stents: Microstructure controls strength of 316L • Self expanding – Hardened 316L (drawn) – Compress, insert – Relaxes to original d • Balloon expandable – Soft 316L (annealed) – Compress to small d – Put on balloon, insert – Blow up balloon to original d J.W. Morris, Jr. University of California, Berkeley Engineering 45 Spring, 2010 Outline of the Course • Composition = atoms or molecules present • Microstructure = location of atoms or molecules – How can we locate 10 23 atoms? – Use reference states: • Crystal (periodic distribution) + defects • Glass (random distribution) + defects • Properties – Thermochemical (response to heat or environment) – Electromagnetic (response to electromagnetic fields) – Mechanical (response to mechanical forces) J.W. Morris, Jr.J....
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This note was uploaded on 02/09/2010 for the course ENGIN 45 taught by Professor Devine during the Spring '07 term at Berkeley.

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e4510lecture-1 - J.W Morris Jr University of California...

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