Nano-Structuring of 316L Type Steel by Severe Plastic Deformation Processing Using Two-Dimensional Linear Plane Strain Machining

Abstract:

Using a novel plastic deformation technique, termed linear plane-strain machining, large shear strains up to ~2.3 have been imparted to 316L stainless steel at rates of up to 1700/s. Combinations of hardness and magnetic measurements, X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments were used to monitor the microstructural and mechanical property changes for the room temperature plastic deformation processing. Grain refinements to the ultra-fine grained and even the nanocrystalline size regime have been achieved without formation of significant volume fractions of strain-induced martensite. The mechanical strength enhancements in the linear plane-strain machined 316L have been attributed to grain refinement and stored strain. The suppression of martensite formation has been correlated to significant adiabatic heating of the 316L during high strain rate plastic deformation processing.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 2720-2725
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.2720
• Online since: May 2014
• Authors: Jorg M.K. Wiezorek*, G. Facco, Y. Idell, A. Kulovits, M.R. Shankar
• Keywords: Austenitic Stainless Steel, Grain Size Strengthening, Nanocrystalline Grain Refinement, SPD Processing, Transmission Electron Microscopy (TEM)

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