Metallurgical Engineering
GATE MT Strain tensor and stress tensor, Representation by Mohr’s circle, elasticity, stiffness and compliance tensor, Yield criteria, Plastic deformation by slip and twinning. PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–20 of 27. Imported answers require independent review unless marked reviewed.
Question 32
Open questionMTMCQ2 marksNeeds review
A single crystal aluminium sample is subjected to uniaxial tension along [112̄] direction. If the applied tensile stress is 100 MPa and the critical resolved shear stress (CRSS) is 25 MPa, which one of the following slip systems will be activated?
Your answerChoose one option.
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A metal plate is in a state of plane strain (
) with
and
. If the Poisson’s ratio is 0.3, the ratio,
is __________ (round off to 1 decimal place).Log in to check the answer
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The number of independent elastic constants of an isotropic material is:
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A slip system consists of a slip plane and a slip direction. Which one of the following is NOT a valid slip system in a FCC copper crystal?
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 16
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The indenter used in Rockwell hardness measurements on C scale is
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During low strain rate (≤ 0.1 per second) deformation of a metal at room temperature, the one that deforms by twinning mode is ____________.
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 32
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An aluminum single crystal is loaded in tension along [1̄ 1 0] axis. Among the following slip systems, the one that will be activated first is
Your answerChoose one option.
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The correct Mohr’s circle construction for the stress state given below is _____________.
Stress state:
,
,
.The shared axes are
to the right and
upward.Your answerChoose one option.
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A material, made up of alternating layers of metals A and B, is loaded as shown below. If the volume % of B is 25%, the elastic modulus (in GPa, rounded off to one decimal place) of the material is ________.
Given: Elastic moduli of A and B are 200 GPa and 100 GPa, respectively.
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True stress - true strain behavior of a metal is given by the flow curve equation
where
is in MPa. The true stress at necking (in MPa, rounded off to the nearest integer) is ________.Log in to check the answer
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