Metallurgical Engineering
GATE MT Strengthening mechanisms PYQs
Build your understanding with focused practice from past exam papers.
How to practice Strengthening mechanisms
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–6 of 6. Imported answers require independent review unless marked reviewed.
Question 21
Open questionMTMCQ1 markNeeds review
Two randomly oriented polycrystalline copper samples with average grain sizes of 10 μm (Sample A) and 100 μm (Sample B) were tested at room temperature.
Given:
Eₐ = Young’s modulus of Sample A
Eᵦ = Young’s modulus of Sample B
YSₐ = Yield strength of Sample A
YSᵦ = Yield strength of Sample B
Which one of the following statements is CORRECT?
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 63
Open questionMTNAT2 marksNeeds review
Strain hardening behavior of an alloy is given by
, where
and
are true stress and true strain, respectively. The alloy is cold drawn to an unknown amount of strain, followed by tensile testing. If the tensile test showed 10 % reduction in area at maximum load, the unknown amount of strain from prior cold work is __________ (round off to 2 decimal places).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 41
Open questionMTMCQ2 marksNeeds review
Match the phenomena (Column I) with the descriptions (Column II)
Column I
(P) Cottrell atmosphere
(Q) Suzuki interaction
(R) Bauschinger effect
(S) Nabarro-Herring creep
Column II
(1) Decrease in yield stress when loading direction is reversed
(2) Stress assisted diffusion of vacancies resulting in plastic deformation in a polycrystalline material
(3) Lüders bands
(4) Segregation of solutes to the stacking fault
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 47
Open questionMTNAT2 marksNeeds review
In a material, a shear stress of 100 MPa is required to bow a dislocation line between precipitates with a spacing of 0.2 μm. If the spacing between the precipitates is increased to 0.5 μm, the shear stress (in MPa) to bow the dislocation would be: __________ (round off to nearest integer).
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 41
Open questionMTNAT2 marksNeeds review
A continuous and aligned carbon-fiber composite consists of 25 vol. % of fibers in an epoxy matrix. The Young’s modulus of fiber and matrix, respectively are
and
. If the composite is subjected to longitudinal loading (iso-strain condition and assuming elastic response), the fraction of load borne by the reinforcement is ______ (to two decimal places)Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 17
Open questionMTMCQ1 markNeeds review
Both creep resistance and tensile strength of a metal can be enhanced by
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