Given the stress tensor, the maximum shear stress is MPa (round off to the nearest integer).

Given the stress tensor, the maximum shear stress is MPa (round off to the nearest integer).

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Home/Mechanical Metallurgy

Given the stress tensor, the maximum shear stress is MPa (round off to the nearest integer).

Given the stress tensor, the maximum shear stress is MPa (round off to the nearest integer).

Read lessHigh cycle fatigue data for an alloy at various alternating stresses, 𝜎a (see figure) is given below.A specimen of this alloy is subjected to multiple stress cycles sequentially in the following order: (i) first 5000 cycles at σa = ...Read more

High cycle fatigue data for an alloy at various alternating stresses, 𝜎_{a} (see figure) is given below.

A specimen of this alloy is subjected to multiple stress cycles sequentially in the following order: (i) first 5000 cycles at σa = 400 MPa followed by (ii) 25000 cycles at σa = 300 MPa and finally (iii) at σa = 500 MPa. Assuming that Miner’s law is obeyed, the number of cycles to failure at the final applied stress of

500 MPa is .

Read lessConsider a tilt boundary of misorientation of 2o in an aluminium grain. The lattice parameter of aluminium is 0.143 nm. The spacing between the dislocations that form the tilt boundary is ______ nm (round off to 2 decimal places).

Consider a tilt boundary of misorientation of 2^{o} in an aluminium grain. The lattice parameter of aluminium is 0.143 nm. The spacing between the dislocations that form the tilt boundary is ______ nm (round off to 2 decimal places).

From high temperature tensile testing, the flow stress (measured at the same value of strain) of an alloy was found to be 50 MPa at a strain rate of 0.1 s–1 and 70 MPa at a strain rate of 10 ...Read more

From high temperature tensile testing, the flow stress (measured at the same value of strain) of an alloy was found to be 50 MPa at a strain rate of 0.1 s^{–1} and 70 MPa at a strain rate of 10 s^{–1}. The strain rate sensitivity parameter is (round off to 3 decimal places).

Find the correct match between dislocation reactions (Column A) to the descriptions (Column B)

Find the correct match between dislocation reactions (**Column A**) to the descriptions (**Column B**)

9.09% (A) 𝜖̇ ∝ 𝑣2 ( 1 voter )

45.45% (B) 𝜖̇ ∝ 𝑣 ( 5 voters )

36.36% (C) 𝜖̇ ∝ 𝜌2 ( 4 voters )

9.09% (D) 𝜖̇ ∝ 𝜌 ( 1 voter )

Based On 11 Votes

28.57%(A) 𝑑𝜎/𝑑𝜖 = 0 ( 8 voters )

21.43% (B) 𝑑𝜎/ 𝑑𝜖 = ϵ ( 6 voters )

46.43% (C) 𝑑𝜎 / 𝑑𝜖 = σ ( 13 voters )

3.57% (D) 𝑑𝜎 / 𝑑𝜖 = ∞ ( 1 voter )

Based On 28 Votes