GATE ME 2016 Set 1 — Question 30
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Engineering Materials → Heat Treatment → Annealing, Normalizing & Hardening
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Question
The "Jominy test” is used to find
Correct answer
(B) hardenability
Solution
The Jominy end-quench test is a standard method used in metallurgy to determine the hardenability of steels. Hardenability refers to the ability of a steel to form martensite when quenched, which is a measure of how deep a steel can be hardened.Let's evaluate the options:
(A) Young's modulus is a measure of the stiffness or elastic modulus of a material, typically determined by tensile tests.
(B) Hardenability is the correct property determined by the Jominy test.
(C) Yield strength is the stress at which a material begins to deform plastically, also typically determined by tensile tests.
(D) Thermal conductivity is a measure of a material's ability to conduct heat, determined by specific heat transfer experiments.Therefore, the Jominy test is specifically designed to measure hardenability.The final answer is
(A) Young's modulus is a measure of the stiffness or elastic modulus of a material, typically determined by tensile tests.
(B) Hardenability is the correct property determined by the Jominy test.
(C) Yield strength is the stress at which a material begins to deform plastically, also typically determined by tensile tests.
(D) Thermal conductivity is a measure of a material's ability to conduct heat, determined by specific heat transfer experiments.Therefore, the Jominy test is specifically designed to measure hardenability.The final answer is
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