Recent questions and answers in Engineering Materials / GO Mechanical

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GATE2020-ME-1: 10
The crystal structure of $\gamma$ iron $\text{(austenite phase)}$ is $BCC$ $FCC$ $HCP$ $BCT$

The crystal structure of $\gamma$ iron $\text{(austenite phase)}$ is$BCC$$FCC$$HCP$$BCT$

go_editor

5.0k points

go_editor asked Feb 19, 2020

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GATE2019 ME-2: 14
Hardenability of steel is a measure of the ability to harden when it is cold worked the maximum hardness that can be obtained when it is austenitized and then quenched the depth to which required hardening is obtained when it is austenitized and then quenched the ability to retain its hardness when it is heated to elevated temperatures

Hardenability of steel is a measure ofthe ability to harden when it is cold workedthe maximum hardness that can be obtained when it is austenitized and then quenchedthe d...

Arjun

28.5k points

Arjun asked Feb 9, 2019

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GATE2018-2-12
Denoting $L$ as liquid and $M$ as solid in a phase-diagram with the subscripts representing different phases, a $\textit{eutectoid}$ reaction is described by $M_1 \rightarrow M_2+M_3$ $L_1 \rightarrow M_1+M_2$ $L_1+M_1 \rightarrow M_2$ $M_1 +M_2 \rightarrow M_3$

Denoting $L$ as liquid and $M$ as solid in a phase-diagram with the subscripts representing different phases, a $\textit{eutectoid}$ reaction is described by$M_1 \rightar...

singhalok

140 points

singhalok answered Mar 14, 2018

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GATE2018-2-13
During solidification of a pure molten metal, the grains in the casting near the mould wall are coarse and randomly oriented fine and randomly oriented fine and ordered coarse and ordered

During solidification of a pure molten metal, the grains in the casting near the mould wall arecoarse and randomly orientedfine and randomly orientedfine and orderedcoars...

Arjun

28.5k points

Arjun asked Feb 17, 2018

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GATE Mechanical 2014 Set 1 | Question: 51
A metal rod of initial length $L_0$ is subjected to a drawing process. The length of the rod at any instant is given by the expression, $L(t)=L_0(1+t^2)$ , where $t$ is the time in minutes. The true strain rate (in $min^{−1}$) at the end of one minute is _______

A metal rod of initial length $L_0$ is subjected to a drawing process. The length of the rod at any instant is given by the expression, $L(t)=L_0(1+t^2)$ , where $t$ is t...

Arjun

28.5k points

Arjun asked Feb 19, 2017

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GATE ME 2013 | Question: 17
For a ductile material, toughness is a measure of resistance to scratching ability to absorb energy up to fracture ability to absorb energy till elastic limit resistance to indentation

For a ductile material, toughness is a measure ofresistance to scratchingability to absorb energy up to fractureability to absorb energy till elastic limitresistance to i...

piyag476

1.4k points

piyag476 asked Feb 19, 2017