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18 Nov 2019
Pick just one of the materials (curves) featured in Fig. 7 (or analyze each of them separately if you wish) What statement below is for explaining the trend that any given material exhibits on this figure (in terms of the axes)? a Decreasing solute content generally strengthens an alloy (b) Limiting crack growth results in increased ductility (c) Dislocation density (count per volume) generally increases during plastic deformation at room temperature, (d) Dislocations prefer to slip on low-density planes and in low- density directions within a crystal. (e) Producing a multiphase microstructure tends to strengthen an alloy. A plate of glass is pulled in tension. Which of the elliptical flaw configurations shown in Fig. 8 is least likely to grow as a crack in the glass? A Borosilicate Glass component must not fail when a tensile stress of 30 MPa is applied. Determine the maximum allowable surface crack length for a loading/geometry with geometric factor of 1.0 Assume the major axis of the elliptical flaw is normal to the tensile loading axis. (a) 4.6 mm (b) 230 mm (c) 0.23 mm (d) 2.3 mm (e) 0.46 mm
Pick just one of the materials (curves) featured in Fig. 7 (or analyze each of them separately if you wish) What statement below is for explaining the trend that any given material exhibits on this figure (in terms of the axes)? a Decreasing solute content generally strengthens an alloy (b) Limiting crack growth results in increased ductility (c) Dislocation density (count per volume) generally increases during plastic deformation at room temperature, (d) Dislocations prefer to slip on low-density planes and in low- density directions within a crystal. (e) Producing a multiphase microstructure tends to strengthen an alloy. A plate of glass is pulled in tension. Which of the elliptical flaw configurations shown in Fig. 8 is least likely to grow as a crack in the glass? A Borosilicate Glass component must not fail when a tensile stress of 30 MPa is applied. Determine the maximum allowable surface crack length for a loading/geometry with geometric factor of 1.0 Assume the major axis of the elliptical flaw is normal to the tensile loading axis. (a) 4.6 mm (b) 230 mm (c) 0.23 mm (d) 2.3 mm (e) 0.46 mm