Question

A rod with a length of L has to be made to carry load F. You need to select from the following alloys: Material Density g/cc Yield Strength, MPa AI 7075 2.81 503 AISI 4340/SAE 7.85 1160 Mg-ZK61 1.83 195 Ti8Al1Mo1V 4.37 570 Which one will have the lightest weight

Answer 1

Answer:

AI 7075

Explanation:

Material                Density g/cc         Yield strength      

AI 7075                   2.81                         503

AISI 4340/SAE       7.85                         1160

Mg-ZK61                 1.83                          195

Ti8A|1Mo1V             4.37                         570

Determine the alloy with the lightest weight using this relationship

weight ∝  ( S / E )

E = yield strength

S = density

• for AI 7075   =  2.81 / 503 = 0.00558648
• for AISI 4340/SAE = 7.85 / 1160 = 0.00676724

• for Mg-ZK61  = 1.83 / 195 = 0.00938462

• for Ti8A|1Mo1V  = 4.37 / 570 = 0.00766667

from the above calculation the alloy with the lightest weight is ;

AI 7075