B.TECH - Semester 4 metallurgy and materials science Question Paper 2022 (dec)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What are the important point defects in a cryslalline structure?
- How is Schmid's law related lo dislocation movement?
- How does grain size reduclion result in strenglhering? 4 Explain Gibb's phase rule.
- Differentiate between ductile and brittle modes of fracture.
- What is the significance of S-N curve?
- How san a bainitic slruclure te oblained on eulectoid sleel?
- Explain any one striface hardening process.
- What is the range of carbon conlent in low, medium and high carbon steels?
- Whal is a biomaterial? $$ \text { ( } 10 \times 2=20 \text { Marks) } $$
- (a) Deline the terms unit cell, coordination number and atomic packing factor with respect to a cryslalline structure. Hence oblain alomic packing factor of FCC structure.
- (b) Explain the mechanism of dislocation and twinning in the plastic deformation of a cryslai. OR
- (a) Explain the primciple of solid solution strengthening and dispersion strengthening.
- (b) How does the properties of a work hardened material change during recovery, recrystallization and grain growth phase?
- (a) What is ductile to britlle transition?
- (b) Explain Griffilh's theory of brittle Iracture, Obtain an expression for critical crack size lor the propagation of crack OR 14 (a) What is lever rule? Whal is ils significance?
- (b) Skelch and explain the phase dlagram of a lypical binary alloy sysiam whose components are complotely soluble in the liquid phase bul completely insoluble in the solid phase.
- (a) Skelch the complete iron carbon equilibrium diagram, and explain the invariant reactions in it.
- (b) Write a note on austenile and cementite phases in the iron carbon equilibrium diagram. OR
- (a) What is the difference between hardening and lempering?
- (b) Deline hardenability and explan the procedure for Jominy's end quench lest.
- (a) Differentiate belween smarl materials and nano malerials.
- (b) Explain the various lypes of cast fron and the manner in which carbon is dislibuled in each lype. How does it affect the properties of cast iron?
- (a) Write a note on the engineering applications of alloys of aluminium and copper.
- (b) How does a composite malerial differ Irom a convenlional malerial? Whal is the role performed by matrix and fibre phases in a compusile malerial? ( $4 \times 20=80$ Marks)