|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Microscale Evaluation of Hydrogen Susceptibility of Martensitic Sheet Steels
||Yiran Lu, Shrikant Bhat, Sharvan Kumar
|On-Site Speaker (Planned)
Hydrogen susceptibility of multiphase advanced high strength steels (AHSS) with tensile strengths greater than 1 GPa is a concern for automotive applications. Understanding the hydrogen susceptibility of constituent phases of AHSS can provide valuable insights into alloy design to mitigate the problem. Towards this end, this effort focuses on microscale experimental techniques including nanoindentation, micropillar compression and smooth and notched microcantilever bending in a microfluid cell to provide insights into hydrogen susceptibility of three grades of martenstitic steels M900, M1300 and M1700. Scanning electron microscopy coupled with EBSD enables selecting pre-determined orientations of single packet/block of martensite for characterization while post-deformation characterization using SEM and/or TEM analysis assists with deformation/damage characterization. Our observations confirm increased susceptibility with increased strength grade and orientation dependence of susceptibility; they also support the notion of hydrogen enhanced local plasticity. Details of these experiments will be presented and results and their implications will be discussed.
||Planned: Supplemental Proceedings volume