The GATE Grind

GATE Physical Metallurgy: Heat treatment and recrystallization – Previous Year Questions

12 GATE previous year questions on Heat treatment and recrystallization (Physical Metallurgy, Metallurgical Engineering) with answers and explanations, from every paper.

  1. GATE 2021 MT Q19 (1 mark, Multiple choice) – Which element alloyed with iron is a ferrite stabilizer?
  2. GATE 2021 MT Q20 (1 mark, Multiple choice) – Which is the correct decreasing sequence of quenching power for steel heat treatment?
  3. GATE 2022 MT Q22 (1 mark, Multiple choice) – The CCT diagram of a eutectoid steel with a superimposed cooling curve is shown in the figure. The microstructure at room temperature (RT) after this…
  4. GATE 2022 MT Q28 (1 mark, Multiple choice) – With increase in carbon content (up to 2 mass%) in Fe-C alloy, which one of the following statements is correct with respect to the lattice parameters…
  5. GATE 2022 MT Q31 (1 mark, Multiple select) – Identify the correct statement(s) with respect to the role of nickel as an alloying element in steels.
  6. GATE 2023 MT Q50 (2 marks, Multiple select) – For the given schematic TTT diagram of an eutectoid steel, the following statement(s) is/are true for the heat treatment schedules HT-1, HT-2, and…
  7. GATE 2024 MT Q23 (1 mark, MTA) – Which crystal-structure change occurs when mild steel transforms from austenite to martensite?
  8. GATE 2025 MT Q28 (1 mark, Multiple select) – Which of the following statements is/are CORRECT with respect to the initial stage of GP zone formation in a precipitation hardenable Al - 4.5 wt.% Cu…
  9. GATE 2025 MT Q45 (2 marks, Multiple select) – Which of the following statements is/are CORRECT when Ni is added as an alloying element to a low alloy steel?
  10. GATE 2026 MT Q19 (1 mark, Multiple choice) – Which one of the following options is correct? For Al - 4 % Ag alloy (composition in atom %), the correct sequence of operations involved in…
  11. GATE 2026 MT Q23 (1 mark, Multiple choice) – In an Al–4 wt.% Cu alloy during isothermal aging, the correct precipitation sequence is .
  12. GATE 2026 MT Q24 (1 mark, Multiple choice) – Which one of the following options is correct? After cold-working of a metallic specimen, during the recovery stage, its electrical conductivity: