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