"It is necessary to select a metal alloy for an application that requires a yield strength of at least 345 MPa (50,000 psi) while maintaining a minimum ductility (%EL) of 20%. If the metal may be cold worked, decide which of the following are candidates: copper, brass, and a 1040 steel."

- So for each metal alloy use the attached figures as reference and determine the amount of CW% required for a metal alloy to maintain a Yield Strength Y = 345 MPa.

- Left Figure (first) at Y = 345 MPa ( y -axis ) and read on (x-axis):

1040 Steel --------> 0% CW

Brass ---------------> 22% CW

Copper ------------> 66% CW

The corresponding ductility (%EL) for cold Worked metal alloys can be determined from the right figure. Using the %CW for each metal alloy determined in first step and right figure to determine the resulting ductility.

- Right Figure (second) at respective %CW (x-axis) read on (y-axis)

1040 Steel (0% CW) --------> 25% EL

Brass (22% CW) -------------> 21% EL

Copper (66% CW) ----------> 4% EL

We see that both 1040 Steel and Brass maintain ductilities greater than 20% EL at their required CW% for Yield Strength = 345 MPa.

topeadeniran2 topeadeniran2 · Answer 2 · 2022-03-03T15:39:03+01:00

It can can be deduced that the materials that need the ductility of 20%EL include both brass and 1040 steel.

What is ductility?

Ductility simply means the ability of a material to be drawn without fracture. It is simply an indication of how malleable a material is.

It should be noted that the question simply has to do with the use of empirical result for the metal alloys.

Here, the figure attached shows that brass and 1040 steel maintain the ductility that's required.

Learn more about ductility on:

https://brainly.com/question/16496121