Two previously undeformed specimens of the same metal are to be plastically deformed by reducing heir cross-sectional areas. one has a circular cross section, and the other is rectangular, during deformation the circular cross section is to remain circular, and the rectangular is to remain as such. their original and deformed dimensions are as follows:
circular diameter, ( mm) rectangular (mm)
original dimensions 15.2 125 × 175
deformed dimensions 11.4 75 x 200
which of these specimens will be the hardest after plastic deformation, and why?

Circular will be the hardest after plastic deformation because % of deformation is more in circular than in rectangular.

Step-by-step explanation:

Since we have given that

                            Circular diameter, ( mm) Rectangular (mm)

Original dimensions       15.2                         125 × 175

Deformed dimensions      11.4                               75 x 200

So, Percentage of deformation is given by

Similarly, for rectangular ,

Percentage of deformation is given by

Hence, circular will be the hardest after plastic deformation because % of deformation is more in circular than in rectangular.

i you goofed up when writing this, because hnot is not a word minusf is not either. i cannot answer   because of that.

step-by-step explanation: