The following load-elongation data was obtained from a sample 50 mm in length and 12.8 mm in diameter (kN = kilonewtons and 1 MPa = 1 N / mm ') a.       What is the engineering ultimate tensile...

The following load-elongation data was obtained from a sample 50 mm in length and 12.8 mm in diameter (kN = kilonewtons and 1 MPa = 1
^N/_mm')

a.       What is the engineering ultimate tensile strength (MPa)?

b.      What is the true ultimate tensile strength (MPa)?

c.       What is the true ultimate tensile strength (MPa)?

d.      Estimate the strain hardening constant (K) in the strain hardening equation,

e.