Is it possible to conduct a valid plane strain fracture toughness test for a CrMoV steel alloy under the following conditions: KIC = 53 MPa√m , σys = 620 MPa, W = 6 cm, and plate thickness B = 2.5 cm?

Sample: Malleable Steel (AISI 4145) Original Diameter: 6.14mm Final Diameter: 3.54mm Gauge Length: 55 mm Final Length: 68.12 mm

Mechanical Properties-Metals For a bronze alloy, the stress at which plastic deformation begins is 295 MPa and the modulus of elasticity (E) is 108 GPa. (a) What is the maximum load (Fy) that can be applied to a specimen having a cross-sectional area of 314 mm2 without plastic deformation? (b) If the original specimen length is 142 mm, what is the maximum length to which it may be stretched without causing plastic deformation?

A steel specimen is tested in tension. The specimen is 25 mm wide by 12.5 mm thick in the test region. By monitoring the load dial of the testing machine, it was found that the specimen yielded at a load of 160 kN and fractured at 214 kN. a. Determine the tensile stress at yield and at fracture. b. If the original gauge length was 100 mm, estimate the gauge length when the specimen is stressed to 1/2 the yield stress.