ASTM grain size number for a carbon steel sample is 6 What i

ASTM grain size number for a carbon steel sample is 6. What is the number of grains at 200X magnification for this steel? 4 16 8 32 According to Hall-Petch relationship, yield strength of steel decrease with increase in number of grains per inch squared increases with increase in number of grains per. Inch squared number of grains per inch square does not affect yield strength none of the above Number of vacancies at higher high temperature is equals to that at room temperature lower than that at room temperature higher than that room temperature WC-Co is: a composite material a ceramic material a metallic alloy none of the above (110)[111] Represents slip system in HCP crystals SC crystals FCC crystals BCC crystals The angle between [111] and [110] directions is closest to 35 60 45 75 Burger\'s vector and dislocation lines are parallel in screw dislocation and perpendicular in edge dislocation parallel in edge dislocation and perpendicular in screw dislocation always parallel in both edge and screw dislocations always perpendicular in both edge and screw dislocation Packing factor is HCP, FCC, BCC, and simple cubic crystals are 0.74, 0.74, 0.68, 0.52 0.52, 0.74, 0.74, 0.68

Solution

1. 8

2. number of grains per inch square does not affect yield strength.

3. higher than that at room temperatre.

4. WC-Co is a ceramic material.

5. BCC crystals

6. 35

7. parallel in screw dislocation and perpendicular in edge dislocation.