 - 1. Physical metallurgy is a branch of metallurgy that focuses on the relationship between the physical properties of metals and their microstructure. This field encompasses the study of how metals deform, harden, and fail under various conditions, as well as the principles behind alloy design and heat treatment processes. By understanding the underlying physical phenomena at play in metals, physical metallurgists can develop new materials with enhanced properties, optimize manufacturing processes, and improve the performance and reliability of metal components in various applications.
What is the process of forming a new grain structure in a material called?
A) Precipitation hardening
B) Recrystallization
C) Sintering
D) Solidification
- 2. Which metal processing technique involves applying a compressive stress to modify the mechanical properties of a material?
A) Tempering
B) Annealing
C) Cold working
D) Quenching
- 3. Which type of lattice defect increases the material's yield strength by obstructing dislocation movement?
A) Interstitial
B) Vacancy
C) Grain boundary
D) Stacking fault
- 4. What is the process of reducing the grain size in a material to increase its strength called?
A) Sintering
B) Grain refinement
C) Diffusion
D) Recrystallization
- 5. What is the phenomenon where a material under stress deforms permanently called?
A) Elastic deformation
B) Brittle fracture
C) Creep
D) Plastic deformation
- 6. What is the process of heating a material to a specific temperature followed by rapid cooling called?
A) Precipitation hardening
B) Annealing
C) Tempering
D) Quenching
- 7. What is the structure found in steel with a mixture of ferrite and cementite layers called?
A) Ferrite
B) Pearlite
C) Martensite
D) Austenite
- 8. Which parameter affects the strength of a material by impeding the motion of dislocations?
A) Alloying elements
B) Temperature
C) Grain size
D) Strain rate
- 9. What is the term for the measure of a material's resistance to fracture when a crack is present?
A) Impact strength
B) Fatigue strength
C) Ductility
D) Fracture toughness
- 10. In which type of atomic bonding are valence electrons shared between adjacent atoms?
A) Covalent bonding
B) Van der Waals bonding
C) Metallic bonding
D) Ionic bonding
- 11. Which of the following crystal structures is most common in metallic materials?
A) Tetragonal
B) Hexagonal close-packed (HCP)
C) Body-centered cubic (BCC)
D) Face-centered cubic (FCC)
- 12. Which type of imperfection in a crystal lattice results in a misalignment of atomic planes?
A) Second-phase particle
B) Grain boundary
C) Dislocation
D) Twin boundary
- 13. What is the process of heating a material to a specific temperature and then slowly cooling it to alter its properties called?
A) Quenching
B) Tempering
C) Annealing
D) Hardening
- 14. What is the term for the maximum amount of stress a material can withstand before failure?
A) Ultimate tensile strength
B) Fracture toughness
C) Elastic limit
D) Yield strength
- 15. What does the term 'grain boundary' refer to in metallurgy?
A) A specific type of metal alloy
B) A type of crystal defect
C) The boundary between two different metals
D) The interface between two adjacent grains in a metal
- 16. What is the process of reheating a previously quenched or hardened metal to a temperature below its lower critical point?
A) Cold working
B) Tempering
C) Solution heat treatment
D) Annealing
- 17. What did Adolf Martens describe in relation to microstructure and physical properties?
A) The role of kinks, defects, and crystallization
B) The vacancy mechanism of diffusion
C) The Hume-Rothery rules
D) The face-centered cubic phase of steel
- 18. Which two scientists published the theory of grain boundary strengthening in 1953?
A) Georgy Kurdyumov and George Sachs
B) Arne Westgren and Robert P. Fragman
C) E. O. Hall and N. J. Petch
D) Ernest Kirkendall
- 19. What did William Hume-Rothery enumerate in 1926?
A) The Hall–Petch law
B) The Bain orientation
C) The Kirkendall effect
D) The Hume-Rothery rules
- 20. What did William Chandler Roberts-Austen provide in 1875?
A) The Fe-C diagram of steel
B) The diagram Ag-Cu
C) The discovery of age hardening
D) The orientation of martensite and austenite
- 21. What is the name of the effect discovered by Ernest Kirkendall in 1947?
A) Hall–Petch law
B) Roozeboom diagram
C) Kirkendall effect
D) Bain orientation
- 22. What phase of steel did Roberts-Austen describe in 1897?
A) Ferrite
B) Pearlite
C) Austenite
D) Martensite
- 23. Who described the high temperature phase of steel known as austenite?
A) Hendrik Willem Bakhuis Roozeboom
B) Albert Sauveur
C) William Chandler Roberts-Austen
D) Gustav Heinrich Tammann
- 24. Who provided the Fe-Fe3C diagram in 1900?
A) Hendrik Willem Bakhuis Roozeboom
B) Albert Sauveur
C) Ernest Kirkendall
D) William Chandler Roberts-Austen
- 25. Who first attempted the Fe-C diagram of steel in 1896?
A) William Chandler Roberts-Austen
B) Hendrik Willem Bakhuis Roozeboom
C) Ernest Kirkendall
D) Albert Sauveur
- 26. In which year did Arne Westgren and Robert P. Fragman show that the γ phase of steel is face-centered cubic?
A) 1922
B) 1930
C) 1919
D) 1947
- 27. Which of the following is a common technique for surface hardening of metals?
A) Tempering
B) Annealing
C) Carburizing
D) Quenching
- 28. What is the phenomenon where a material exhibits different mechanical properties in different crystallographic directions?
A) Isotropy
B) Anisotropy
C) Heterogeneity
D) Polymorphism
- 29. What did Georgy Kurdyumov and George Sachs reveal in 1930?
A) The orientation of martensite and austenite, now named the Kurdyumov–Sachs orientation
B) The face-centered cubic phase of steel
C) The vacancy mechanism of diffusion
D) The Hume-Rothery rules
- 30. Which parameter measures a material's resistance to indentation or scratching?
A) Hardness
B) Toughness
C) Ductility
D) Elastic modulus
- 31. Who gave the name and symbols associated with the phases of steel in 1887?
A) Dmitry Chernov
B) Floris Osmond
C) Albert Sauveur
D) Henry Clifton Sorby
- 32. Which branch of metallurgy focuses on the physical properties of metals and alloys?
A) Physical metallurgy
B) Organic chemistry
C) Inorganic chemistry
D) Chemical metallurgy
- 33. Who determined the pearlite structure in 1887?
A) Dmitry Chernov
B) Henry Clifton Sorby
C) Floris Osmond
D) Albert Sauveur
- 34. Who revealed the vacancy mechanism of diffusion in 1947?
A) N. J. Petch
B) Georgy Kurdyumov
C) E. O. Hall
D) Ernest Kirkendall
- 35. Who discovered superlattices in 1923?
A) Gustav Heinrich Tammann
B) Alfred Wilm
C) Edgar Bain
D) Adolf Martens
- 36. What did Gustav Heinrich Tammann predict in 1919?
A) The face-centered cubic phase of steel
B) The order-disorder transition of alloys at low temperature
C) The vacancy mechanism of diffusion
D) The atomistic formation of martensite
- 37. Who is credited with founding physical metallurgy in 1868?
A) Pavel Petrovich Anosov
B) Dmitry Chernov
C) William Chandler Roberts-Austen
D) Adolf Martens
- 38. What is the term for the process by which a material gains strength and hardness when subjected to controlled heating and cooling cycles?
A) Annealing
B) Case hardening
C) Quenching
D) Heat treatment
- 39. What is the term for the ability of a material to deform plastically without fracturing?
A) Toughness
B) Hardness
C) Brittleness
D) Ductility
- 40. Who discovered age hardening by accident in 1906?
A) E. O. Hall
B) Ernest Kirkendall
C) Alfred Wilm
D) N. J. Petch
- 41. In which year did Adolf Martens describe the relationship between microstructure and physical properties?
A) 1887
B) 1868
C) 1878
D) 1896
|