TRUE or FALSE? (Write Tor F in the space provided 30 Points bon ate is sc 2. Ste

Question

TRUE or FALSE? (Write Tor F in the space provided 30 Points bon ate is sc 2. Steel grade AISI 1045 contains 4.5% carbon. 3. Presence of beach marks on a fracture surface indicates a fatigue failure mode 4. FCC crystal structure is more densely packed than the BCC structure. 5. Critical Resolved Shear Stress (CRSS) is a property of material, which indicates the minimum amount of shear stress needed to initiate slip (permanent deformation). 6. Tin, lead and antimony are known as noble metals 7. Cup and cone failure could be obtained in tension testing of a cured cement bar. 8. Recrystallization is a process that involves the nucleation and growth of new, strainf replace the original highly deformed and cold worked grains 9. Galvanizing is a process of coating of steel with Nickel to improve the hardness of 180 Vickers.( with hardness of 220 Vickers is harder than material with a 10. Material

Explanation / Answer

1.True

2.False..it can be 0.45 % carbon

3.The presence of beach marks on a fracture surface confirms that the cause of failure is fatigue. So true.

4.True...As for FCC , atomic packing factor = 0.74

But for BCC, atomic packing factor = 0.68

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