MatS_3011_F09_Exam_2

MatS_3011_F09_Exam_2 - University of Minnesota Department...

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1 University of Minnesota Department of Chemical Engineering and Materials Science MatS 3011: Introduction to Materials Science and Engineering Fall Semester 2009 Hour Exam #2 (November 4, 2009) Name _____________________________________ You have 50 minutes. This exam is closed book and closed notes. Please work alone and turn off all communication devices such as cell phones. Please give your answers in the space provided. Typically, the space provided should be more than enough. Do not feel obliged to fill the whole page with your answers. However, if you need additional space you may use the back of the page but if you do so please clearly indicate what problem the work belongs to. Good luck! 1) (15 pts) (a) If you need to improve elastic properties of the cylindrical bar of metal and increase the yield and tensile strengths, what you would do? And why you think it will work? (b) After you improved (increase) the yield strengths of the metal, will this metal have higher or lower modulus of resilience? Will it have higher or lower toughness? Explain your answers. (c) After you improved (increase) the yield strengths of the metal and waited for a day or so, you
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This note was uploaded on 03/22/2012 for the course MATS 3011 taught by Professor Staff during the Spring '08 term at Minnesota.

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MatS_3011_F09_Exam_2 - University of Minnesota Department...

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