|About this Abstract
||MS&T23: Materials Science & Technology
||Steels for Sustainable Development II
||Microstructural Engineering and Accelerated Test Method Development to Achieve Low Cost, High Performance Solutions for Hydrogen Storage and Delivery
||Kip O. Findley, Lawrence Cho, Pawan Kathayat, Jason Kong, John Speer, Chris San Marchi, Joseph Ronevich, Samantha Lawrence, Mary O'Brien, Ashok Saxena, Don Brown, Bjorn Clausen
|On-Site Speaker (Planned)
||Kip O. Findley
High Mn steels with austenitic or austenite-delta ferrite duplex microstructures are being developed as potential solutions to lower the cost of hydrogen fueling and transportation infrastructure. Austenitic alloys were designed using austenite stacking fault energy as a criterion for hydrogen embrittlement (HE) resistance. Duplex alloys were designed to achieve a sufficiently high austenite stacking fault energy for a given volume fraction of austenite. Cold rolling and aging of designed V-microalloyed steels was used to achieve higher strength. Austenitic alloy conditions were produced with a tensile strength up to 800 MPa and comparable HE resistance, as measured through in-situ electrochemical charging of notched tensile specimens, to 316 stainless steel with a similar strength level. Similarly, duplex alloy conditions were produced with a tensile strength greater than 950 MPa and better HE resistance than a commercial duplex alloy. Neutron diffraction is being used to correlate deformation mechanisms to HE resistance.