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Meeting MS&T22: Materials Science & Technology
Symposium Steels for Sustainable Development
Presentation Title Probing Hydrogen-assisted Phase Transformations in Austenitic Stainless Steels Using Synchrotron X-ray Diffraction
Author(s) Samantha K. Lawrence, Reeju Pokharel, Bjørn Clausen, Donald W. Brown, John S. Carpenter, Mary K. O'Brien, Christopher W. San Marchi
On-Site Speaker (Planned) Samantha K. Lawrence
Abstract Scope Microstructures and defect populations produced by additive manufacturing (AM) are distinct from wrought products and influence performance in hydrogen-containing environments. The present work builds upon studies of microstructure, mechanical properties, and fracture of AM stainless steels (SS) by utilizing high energy synchrotron x-ray diffraction to probe hydrogen-metal interactions. The objective is to highlight unique aspects of hydrogen-deformation interactions and microstructural evolution during tensile deformation and fatigue loading of 304L SS produced through conventional upset forging and laser powder-bed fusion AM, with and without internal hydrogen (H). Solute H lowers the onset strain for austenite decomposition to martensite in both microstructures. The total fraction of transformation product is larger when the microstructure is H-saturated. Importantly, in the non-charged condition, forged SS did not undergo martensite transformation, while AM SS transformed readily at moderate strains. The interplay between microstructure, loading condition, and hydrogen content on propensity for austenite decomposition will be explored.


Cyclic Deformation and Strain Localization of Ferrite-pearlite Low Alloy Steel under Low-cycle Fatigue
Development of Evaluation Method of Low Alloy Steel in Hydron Environment Using Concurrent Cathodic Hydrogen Charging
Development of Ultra-high Strength TWIP Steel with Increased Corrosion Resistance
Evaluation of Heavy Gauges 690 MPa-class Offshore Steel Racks Required in Modern Wind Turbine Installation Vessels
Exploring the Impact of N Solubility and Trace Elements on the Creep Properties of P92 Steel
F-3: Suitability of 17-4 PH Stainless Steels as Choice Material for Compression Pumps Used in CCS (Carbon Capture And Storage) Systems
Influence of C and N on Hydrogen Embrittlement in 17Cr-10Ni-6Mn Stable Austenitic Stainless Steel
Low-density, Medium-Mn Steels for Lightweighting: Influence of Al content on Microstructure and Tensile Properties
Maximizing Scrap Recycling by Designing Cu Tolerant Steel Compositions
Mechanical Property Alterations through Hydrogen Trapping by Nanocarbide Dispersions in Steels
Microstructural Engineering of High Mn Duplex Steel to Achieve Low-cost, High-performance Solutions for Hydrogen Storage and Delivery
Probing Hydrogen-assisted Phase Transformations in Austenitic Stainless Steels Using Synchrotron X-ray Diffraction
Steel Developments for the Global Energy Transition
The Essence of Mo and Ni Alloying in Steels for Renewable Power Generation
Through Thickness Microstructural Features for Optimum Ductility Performance In High Pressure Gaseous Hydrogen Pipelines

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