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  1. ... pulled in tensile to failure. after failure, the gauge length is 80mm and the diameter is 3 mm. ...100% ε =80-50/50 *100% = 60% (2) the percent area reduction r = A-Ao/Ao *100% r = π(1.5)^2- π(2...

    分類:科學 > 化學 2012年10月27日