HWCH9Spring - IE 320 Spring 2003 Homework Ch 9 Introduction...

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Homework Ch. 9 2 Introduction to Materials Science 9.1 Cite at least two situations in which the possibility of failure is part of the design of a component or product. 9.6 (13.37) Briefly explain (a) why there may be significant scatter in the fracture strength for some given ceramic material, and (b) why fracture strength increases with decreasing specimen size. 9.18 Suppose that a wing component on an aircraft is fabricated from an aluminum alloy that has a plane strain fracture toughness of 40 MPa m. It has been determined that fracture results at a stress of 365 MPa when the maximum internal crack length is 2.5 mm. For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 4.0 mm.
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3 Introduction to Materials Science 9.28 Briefly explain why BCC and HCP metal alloys may experience a ductile- to-brittle transition with decreasing temperature, whereas FCC alloys do not experience such a transition. 9.32 A 12.5mm diameter cylindrical rod fabricated from a 2014-T6 alloy (Figure
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HWCH9Spring - IE 320 Spring 2003 Homework Ch 9 Introduction...

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