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

AI 7075

Step-by-step 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