Calculate the mean diameter of the grain at t=5sec, Assume the grain boundary energy and mobility are given as 5 Nmm-1 and 10mm3J-1s-1 respectively? (Assume the mean size of the grain at t=0 as 3mm)

Calculate the mean diameter of the grain at t=5sec, Assume the grain b

1.	Calculate the mean diameter of the grain at t=5sec, Assume the grain boundary energy and mobility are given as 5 Nmm^-1 and 10mm³J^-1s^-1 respectively? (Assume the mean size of the grain at t=0 as 3mm)
A.	109mm
B.	1009mm
C.	10.9m
D.	9mm
Answer» C. 10.9m

Discussion

No Comment Found

Related MCQs

Assume the volume fraction 0.4 of particles all with a radius 3mm, the grain boundary energy is given as 6kJ/mm. Calculate the restraining force per unit area of boundary? (Approximately)
Aluminium-killed steels contain aluminium nitride precipitates which stabilize the austenite grain size during heating.
Stabilization of a fine grain size during heating at high temperatures requires__________
Calculate the maximum grain size D max possible, if the radius of the spherical particle is 5mm and the volume fraction is given as 0.2?
If there is a volume fraction f of particles all with a radius r the mean number of particles intersecting unit area of a random plane is_________
The nature of normal grain growth in the presence of a second phase deserves special consideration. The moving boundaries will be attached to the particles exert a pulling force on the boundary restricting its motion. Therefore if the boundary intersects the particle surface at 90 the particle will feel a pull of (2 r cos )*sin . This will be counterbalanced by an equal and opposite force acting on the boundary. As the boundary moves over the particle surface changes and the drag reaches a maximum value, this happens when becomes______
There can be this growth of just a few grains to very large diameters. Such situation is known as_____
Experimentally for finding the grain size we use the equation, D = Kt . Here K is the temperature dependent proportionality constant and n is a number less than 0.5 and this n can be taken as 0.5 under which circumstances?
Surface grooving where grain boundaries intersect free surfaces leads to_______
Coarsening is a process that can be considered quite identical to grain growth.

Calculate the mean diameter of the grain at t=5sec, Assume the grain boundary energy and mobility are given as 5 Nmm-1 and 10mm3J-1s-1 respectively? (Assume the mean size of the grain at t=0 as 3mm)

Discussion

No Comment Found

Related MCQs

Reply to Comment

Calculate the mean diameter of the grain at t=5sec, Assume the grain boundary energy and mobility are given as 5 Nmm^-1 and 10mm³J^-1s^-1 respectively? (Assume the mean size of the grain at t=0 as 3mm)