The stress€“strain diagram for an aluminum alloy specimen having an original diameter of 0.5 in. and a gage length of 2 in. is given in the figure. If the specimen is loaded until it is stressed to 60 ksi, determine the approximate amount of elastic recovery and the increase in the gage length after it is unloaded.

Transcribed Image Text:

o (ksi) 70 60 50 40 30 20 10 € (in./in.) 0 0.02 0.04 0.06 0.08 0.10 0.12 0,14 0.16 0.18 0.2 0 0.0025 0.0050.0075 0.01 0.01250.0150.0175 0.02 0.0255 0.025