GATE Metallurgical Thermodynamics: Phase equilibria and phase diagrams – Previous Year Questions
11 GATE previous year questions on Phase equilibria and phase diagrams (Metallurgical Thermodynamics, Metallurgical Engineering) with answers and explanations, from every paper.
- GATE 2021 MT Q32 – Steel containing 0.6 wt.% C is cooled slowly from 900 °C to room temperature. The proeutectoid ferrite fraction is (two decimal places). Given…
- GATE 2021 MT Q39 – The number of degrees of freedom for M(s)+CO 2(g) MO(s)+CO(g) is .
- GATE 2021 MT Q40 – Which condition gives the binary A–B phase diagram shown? H mixsolid and H mixliquid denote solid and liquid mixing enthalpies.
- GATE 2022 MT Q65 – The equilibrium microstructure of an alloy A-B consists of two phases α and β in the molar proportion 2:1. If the overall composition of the alloy is…
- GATE 2023 MT Q11 – At one atmosphere, -Fe transforms to -Fe above 912 °C. The density of -Fe exceeds that of -Fe. Choose the correct statement.
- GATE 2023 MT Q32 – Maximum number of phases that can be in equilibrium for a 5-component system at constant temperature and pressure is (in integer).
- GATE 2023 MT Q61 – The alloy A (given in the phase diagram) is cooled slowly from the liquid state to just below the eutectic temperature. The ratio of weight fractions…
- GATE 2024 MT Q61 – An 800 g A–B alloy containing 20 wt.% B is held at T 1 in the shown phase diagram. The mass of B dissolved in α is g (nearest integer).
- GATE 2025 MT Q23 – In the Fe–C system, the invariant reaction Liquid+ takes place at 1493 °C. This reaction is called .
- GATE 2025 MT Q37 – Consider the phase diagram of a one-component system. V , V , and V Liquid are the molar volumes of the α, β, and liquid phases, respectively. Which…
- GATE 2026 MT Q34 – For an equilibrium phase diagram of a binary A-B alloy at a constant pressure as shown in the figure, the degree of freedom at ‘X’ is (answer in…