|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
||Microstructural Evolution during Early Stages of Hot Isostatic Pressing of 316L Austenitic Stainless Steel
||Sandeep Irukuvarghula, Hany Hassanin, Moataz Attallah, Michael Preuss
|On-Site Speaker (Planned)
The microstructural evolution of 316L austenitic steel during the early stages of powder hot isostatic pressing (HIPping) was investigated by interrupting the HIPping cycle at progressively increasing temperatures, starting from 950˚C. The grain boundary character distribution (GBCD) was studied using electron back scattered diffraction. Our results demonstrate that the microstructure evolves from a random high angle grain boundary distribution in the as-received powder to a twin dominated one in the specimen subjected to full HIPping cycle. Additionally, the fraction of twins (first, second, and third order) and triple junctions with twin boundaries increase as the HIPping temperature increases. Our results suggest that altering the HIPping cycle and/or powder characteristics can potentially change the grain boundary network topology, which affects the performance of the powder HIPped components.