STUPIDSID
1 (a)
Define the following lattice;
Unitcell.
Space lattice.
Atomic packing factor.
Coordination number.
Unitcell.
Space lattice.
Atomic packing factor.
Coordination number.
4 M
1 (b)
Calculate the volume of the zinc crystal structure unit cell by using the following data:pure zinc has the HCP crystal structure with lattice constant a-o.2665nm and c=0.4947,nm
4 M
1 (c)
State and explain Fick first law of diffusion
4 M
1 (d)
What do you mean by crystaline impersion ?Expalin brifly point and scalar /line defects
8 M
2 (a)
Compare the engineering stress and strain with the true stress and stress for the tensile test a low carbon steel that has the following test values :
Load applied to seciaman =75kN
initial diameter of specimen under 75kN load -12mm
Load applied to seciaman =75kN
initial diameter of specimen under 75kN load -12mm
4 M
2 (b)
Derive the expresion for critically resolved sher stress (CRSS)
4 M
2 (c)
Describe the dislocation mcanism that enables a metal to be plastically deformed within fracture
6 M
2 (d)
What do you mean by linear and nonlinear elastic propertise of a material ?Explain any four propertis e
6 M
3 (a)
Define creep and explain a typical curve
6 M
3 (b)
what is frature ?state the difference between ductile and brittle fracture
8 M
3 (c)
State the factor that affect the figure strength of a metal. Explain them briefly.
6 M
4 (a)
state and explain Gibbs phase rule
4 M
4 (b)
Explain homogenous nucleation .discuss the significance of critical radius of nuclci
8 M
4 (c)
What is a solid solution?with suitable example ,explain the different types of solid solution
8 M
5 (a)
Define :
A phase in a material
A phase diagram
A phase in a material
A phase diagram
2 M
5 (b)
Derive the level rule for the binary phase diagrame of two metals A and B completely soluble in each other
4 M
5 (c)
write the equation for the following invarient reaction;enteric,pericctic,monoteric entecoid and periticoid .How many degree of freedom exist at invariant reaction points in binary phase diagram?
6 M
5 (d)
Draw nearly Iron-carbon phase diagram and mark on it all sailent tempreture composition ,and phases
8 M
6 (a)
Explain the steps to construct TTT diagram.draw a labcled sketch of TTT diagram for an cuteetoid steel
10 M
6 (b)
with neat diagrams ,explain briefly austempering an d martempering hear treatement process
10 M
7 (a)
Discuss briefly about of alloying elements on properties of steel
10 M
7 (b)
Explain with phase diagram modification of Al-Si Alloys
5 M
7 (c)
Write a note on spherodial Graphite (SG)iron
5 M
8 (a)
10 M
8 (b)
Explain with a neat sketch production of MMC by using powder mctalyurgy process
10 M
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