a u (b) Figure Q4 is the S-N curve for three metals; 1045 steel, 2014-T6 aluminium alloy and red brass. (i) (ii) (iii) A 6.4 mm diameter cylindrical rod fabricated from a 2014-T6 aluminium alloy is subjected toreversed tension-compression load

a u (b) Figure Q4 is the S-N curve for three metals; 1045 steel, 2014-T6 aluminium alloy and red brass. (i) (ii) (iii) A 6.4 mm diameter cylindrical rod fabricated from a 2014-T6 aluminium alloy is subjected toreversed tension-compression load cycling along its axis. If the maximum tensile and compressiveloads are +5340N and -5340N respectively, determine its fatigue life. (4 marks) Would a component made from 1045 steel survive if cycled for maximum tensile and compressiveloads of 400 MPa for 106 cycles? Use sketches to expiain your answer. (2 marks) How many more cycles at 200 MPa would the aluminium alloy survive if it has already beenexposed to the stress amplitudes and cycles shown in table Q4? (4 marks)