High Pressure Phase Response of 17-4 Stainless Steel

Like many martensitic Fe-based alloys, 17-4 stainless steel undergoes a high pressure phase transition. In this work, we present a synergistic study using both dynamic and static higher pressure experiments to study the phase transition in 17-4 stainless steel. In-situ X-ray diffraction (XRD) measurements at high-pressures were obtained using both plate-impact experiments at the Dynamic Compression Sector (DCS) and a diamond anvil cell (DAC) at the High Pressure Collaborative Access Team (HPCAT) at the Advanced Photon Source (APS). The results show that the transition is from a body-centered-tetragonal (BCT) structure with minimal elongation to a hexagonal close packed structure (HCP).

Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA0003525. This work describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the work do not necessarily represent the views of the U.S. Department of Energy or the United States Government.