Final 1b

Final 1b - Louisiana State University Mechanical...

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1 Louisiana State University Mechanical Engineering Department ME 2733- Materials of Engineering; Spring 2003 (Section 2) Final Exam Part II SAMPLE May 14, 2003 Name:_________________________ Problem 1 . For the cubic unit cell shown below determine: a) the indices for the direction shown b) the Miller indices for the plane shown. y x 1 2 1 2 1 2 1 3 z 1 2
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2 Name:_________________________ Problem 2. Nitrogen from a gaseous phase is to be diffused into pure iron at 700 o C. If the surface concentration is maintained at 0.1 wt% N, what will be the concentration at a distance of 1 mm from the surface after 10 hours? The diffusion coefficient from nitrogen in iron at 700 o C is D=2.5x10 -11 m 2 /s.
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3 Name:_________________________ Problem 3 . A cylindrical specimen of steel having an original diameter of D 0 =15 mm and an initial length of L o =50 mm is pulled in tension. Given the following material parameters: modulus of elasticity E=80 GPa; shear modulus G=32 GPa and the yield strength σ
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Final 1b - Louisiana State University Mechanical...

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