A METHOD FOR DETERMING THE PLASTIC FLOW PROPERTIES OF SHEET AND ROUND TENSILE SPECIMENS

摘要

An experimental procedure is described for obtaining continuous load-profile measurements of sheet and round tensile specimens during plastic flow. Some data obtained on tempered alloy steel, titanium, 301 stainless steel and an aluminum alloy are presented to illustrate the uses and ad¬vantages of this testing method. With this procedure it was possible to obtain the following data from a single test curve: true stress-strain, true strain rate, mechanical anisotropy and “corrected” flow stress.nTests were conducted primarily at room temperature on sheet material with some low temperature tests conducted on the 301 stainless steel. A round tensile specimen of aluminum was also tested to illustrate a method for determining “corrected” flow stress values according to the Bridgman technique.