The tensile strength of annealed 1040 steel is closest to 67

The tensile strength of annealed 1040 steel is closest to: 675 MPa 450 MPa 770 MPa 900 MPa Failure that occurs due stresses applied at elevated temperature is called Ductile Failure Brittle Failure Fatigue Failure Creep Failure Ductile to Brittle Transition is seen in if FCC metals when cooled below a critical temperature BCC metals when cooled below a critical temperature High strength metals when cooled below a critical temperature All metals when cooled below a critical temperature

Solution

>> 1st Figure not Clear

>> Failure due to Stresses at elevated temperature is known as Creep Failure

It occurs in three stages

>> As FCC is ductile Structure, while BCC is brittle one.

So, When FCC Metals are cooled below a critical temperature, structure changes to BCC and that\'s why, Ductile to brittle Transition takes Place....