Investigation of the evolution of Geometrically Necessary Dislocation (GND) tensor in a type 316 steel by using in-situ EBSD technique

This paper reports the evolution of GND tensor in 316 austenitic steel at the plastic stage. A significant increase of five GND tensors can be observed. The variations of average values of both positive and negative GND tensors were very symmetric. The largest rise of GND tensor happened at the early plastic stage, while the biggest increase of zero-value point occurred at the later. This result indicates that the rapid accumulation of GND density is a precursor to the defects formation or other material degradation behaviors. Thus, the GND tensors can also be utilized for the degradation analysis of 316 steel. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

This study reveals a significant increase of GND tensor in 316 austenitic steel at the plastic stage, with the largest rise occurring at the early stage and the biggest increase of zero-value point happening later. This suggests that the rapid accumulation of GND density may be a precursor to defects formation or material degradation. The GND tensors can therefore be used for degradation analysis of 316 steel.