Phenomena Occurring in Nanostructured Stainless Steel 316LVM during Annealing under High Hydrostatic Pressure

Author(s)
Agnieszka Teresa Krawczynska, Stanislaw Gierlotka, Przemyslaw Suchecki, Daria Setman, Boguslawa Adamczyk-Cieslak, Michal Gloc, Witold Chrominski, Malgorzata Lewandowska, Michael Zehetbauer
Abstract

The aim of the study is to demonstrate the impact of high hydrostatic pressure annealing on the grain boundary character, precipitation rate, and susceptibility to intergranular corrosion of nanostructured austenitic stainless steel 316LVM. To this end, samples of an austenitic stainless steel are deformed by high pressure torsion and subsequently annealed at 900 °C for 10 min under a pressure of 2, 6 GPa and, for comparison, under atmospheric pressure. The resulting microstructures are examined using electron beam scattering diffraction, and transmission and scanning electron microscopy. It is shown that the pressure applied during annealing leads to a higher percentage of high‐angle grain boundaries than does atmospheric pressure. Moreover, it promotes the coexistence of two orientations, <111> and <100>, whereas atmospheric supports mainly <111>. High pressure hinders the growth of carbides, but drastically increases their number compared with atmospheric pressure annealing. As a consequence, the highest number of Cr23C6 carbides are present in the sample annealed under 6 GPa, making this sample susceptible to intergranular corrosion.

Organisation(s)
Physics of Nanostructured Materials
Journal
Advanced Engineering Materials
Volume
21
No. of pages
9
ISSN
1438-1656
DOI
https://doi.org/10.1002/adem.201800101
Publication date
05-2018
Publication status
E-pub ahead of print
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/phenomena-occurring-in-nanostructured-stainless-steel-316lvm-during-annealing-under-high-hydrostatic-pressure(ed93d3b9-98ae-49c2-98c0-2753ea84542f).html