Super plastic behavior of AISI 329 duplex stainless steel rod at high temperatures under tensile loading

摘要

This paper examines the hot tensile behavior of AISI 329 duplex stainless steel rod to specify its super plastic conditions. At low strain rates, the studied steel reveals super plastic behavior at temperatures above 1000°C associated with elongations of up to 400 percent. The maximum elongation occurs at 1050°C and elongation decreases by subsequent increase in temperature. This seems to be due to the ferrite phase increment at high temperatures, since increasing ferrite phase results in a sharp decline in workability of these steels.