Microstructural Stability and Mechanical Properties of a High Nitrogen Super Duplex Stainless Steel
Year: 1999
Type: article
Abstract: A time temperature transformation (TTT)-diagram with respect to the formation of intermetallie phase in the range 700-1000°C has been assessed by point counting for a 29Cr-6Ni-2Mo-0.38N super duplex stainless steel. Using a computer program developed by the authors a continuous cooling transformation (CCT)-diagram was calculated from the TTT-diagram assuming that the transformation can be described by an Avrami type equation. A comparison of impact toughness and hardness showed that toughness was a very sensitive measure of intermetallic phase formation while hardness was insensitive and showed no significant increase until the material was catastrophically brittle. It was found that Thermo-Cale could be used in a qualitative manner for predicting microstructural changes at various temperatures but was unable to predict variables such as dissolution temperature and volume percentage with accuracy.
Source: Materials science forum
Authors: Jan Olof Nilsson, P. Kangas, T. Karlsson, A. Wilson
Institution: Chalmers University of Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2120754141