Online Lecture by prof. Goro Miyamoto

Orientation Relationship, Variant Selection, and Their Effects on Phase Transformations in Steel

Institute for Materials Research
Tohoku University
Japan

Title:
Orientation Relationship, Variant Selection, and Their Effects on Phase Transformations in Steel.

Abstract:
The crystallography of interphase boundaries plays a crucial role in both displacive and reconstructive transformations. However, analyzing the orientation relationship of the fcc-austenite to bcc transformation in most steels has not been straightforward due to the absence of the austenite phase at room temperature, making direct measurement challenging.
The reconstruction of the austenite matrix enables a quantitative analysis of orientation relationships and variant selection. 

In this presentation, the fundamentals of orientation relationships and variant selection will be explained.

Additionally, I will present examples of crystallographic features in some transformations and discuss their effects on interface mobility, partitioning, segregation, and variant selection during nucleation.

This session was chaired by dr. Erik Offerman (TU Delft)