Mechanical Metallurgy Practice Test 4

1. The theoretical cohesive strength of brittle material is approximately equal to ________

2. In which way, the notch decreases the tendency of brittle failure?

3. The highest strain value is obtained at ___________

4. The initial cross-sectional area of a rod is 500 m² is reduced to 100 m² at the breaking point. Calculate the true fracture strain of the material?

5. As the grain size decreases, the ductile to brittle transition temperature _________

6. Which of the following parameter is used as designing material of components?

7. The Ionic crystal generally fracture in __________

8. The fracture on the sharpest crack tip will be equal to \((\frac{Eϒ_s}{4c})^{1/2}\) .

9. Increasing temperature will lower the rate of strain hardening.

10. The presence of second phase particle reduces the ductility of the material. The type of particle which has the least effect in lowering the ductility is __________