ME 2733 Chapter : 2016 Quiz 8
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Instructions: all responses must be legible (clearly written), print your name, student # and your answers. If you do not know your student #, leave the space blank: for each question, select and record the best answer. 2016-10-26: a rotating beam fatigue test is performed using a 1/2" diameter cylindrical sample made from a 1045 plain carbon steel. The stress amplitude was 40,000 psi and the mean stress is 10,000 psi. In the s n diagram below, which of the following alloys exhibit a fatigue limit: ti-5 al-2. 5 sn, 4340 steel, 2014 t6 al alloy, 70 cu 30 zn brass, all of the above. Use the pb sn diagram to answer questions 7, 8, 9, and 10. 2016-10-26: what is the eutectic composition in wt% sn, 97. 5, 19. 0, 2. 5, 61. 9, none of the above. A 40 wt% sn alloy of pb sn is heated to 300 c and then slowly cooled to just above the eutectic temperature.
