Which curve shown below (A or B) is for a BCC metal and why? A Brittle →More Ductile Temperabure Duclie-b-britte tration temperature Impact Energy

What is the maximum internal flaw size allowable for a 304 Stainless steel alloy that is loaded to a stress two thirds of its yield strength (205 MPa) and it has a fracture toughness of 95 MPa.m0.5. Assume a value of 1.3 for Y

Consider the graph below for 3 metals which have been cold-worked. From the graphs, which of the following statements are true? Stress o Select one or more: □ c. Strain & A e. B a. B and C have similar hardness; C has greater brittleness b. B is softer than C and has nearly similar ductility A is harder than C and is more ductile C d. B is harder than C but has nearly similar ductility A is harder than C and is less ductile f. A and B have similar hardness; A has greater brittleness

How can we prevent fatigue in the material?

QUESTION 14 A precipitation strengthened aluminium alloy has the following material properties: E = 75 GPa o = 450 MPa y K = 35.4 MPa m¹/2 C On inspection of a lightweight pressure vessel, a plate made from this alloy, with a width of 35 mm, is found to contain an edge-crack with a length of 3.5 mm during a regular maintenance inspection. Under standard operating conditions, this plate is subjected to a peak stress of 125 MPa. Estimate the critical crack length (ac) for fast fracture to occur under the applied stress. Give your answer in millimetres (mm) to an accuracy of two decimal places. Do not include the units 'mm' in your answer. Only give the numerical value. The stress intensity is given by the standard equation (K=Yona) where Y= 1.12 for an edge-crack in a semi-infinite width plate. πα