Question

1) It is necessary to select a metal alloy for an applicationthat requires a yield strength of at least34 5 MPa while maintaining a minimumductility (%EL) of2000. If the metal maybe cold worked, decide whi arecandidates: copper, brass, or a 1040 steel. Why? ch of the following 2) A cylindrical specimen of steel having an original diameter of 12.8 mm is tensile tested to fracture and found to have an engineering fracture strengtlh (o) of 460 MPa. If its cross-sectional diameter at fracture is 10.7 mm, determine: a. The ductility in terms ofpercent reduction in area b. The true stress at fracture (3 marks) (3 marks)

I would appreciate if you can solve both questions, please. For question one, please show analysis of the work for the three metals and which once are candidates?

Answer 1

nscve necessary to select a melal a o Select a meta alloy tor an applPal on sequires a yield 345 mpo ro pa. 0IO hh le maintaing a miimum duetili -for o4o Steel o for Brass90 . for Copper 60 G10 tinghepercin usin e ductiity for each allou for Brass 23小EL For Coppe r 4 L herefore oth loto steel ancl Brass can be used as hey have dlu IAPy EL geate han 20 ave clu CP Copper does n Satis