Parent grain reconstruction from partially or fully transformed microstructures in MTEX

A versatile generic framework for parent grain reconstruction from fully or partially transformed child microstructures has been integrated into the open-source crystallographic toolbox MTEX. The framework extends traditional parent grain reconstruction, phase transformation and variant analysis to all parent-child crystal symmetry combinations. The inherent versatility of the universally applicable parent grain reconstruction methods and the ability to conduct in-depth variant analysis are showcased via example workflows that can be programmatically modified by users to suit their specific applications. This is highlighted by three applications, namely alpha'-to-gamma reconstruction in a lath martensitic steel, alpha'-to-beta reconstruction in a Ti alloy, and a two-step reconstruction from alpha' to epsilon to gamma in a twinning and transformation-induced plasticity steel. Advanced orientation relationship discovery and analysis options, including variant analysis, are demonstrated via the add-on function library ORTools.

Automated summary

This article presents a versatile generic framework for parent grain reconstruction and its application in various crystal symmetry combinations. The framework's flexibility and the capability of variant analysis are demonstrated through example workflows. The add-on function library ORTools provides advanced orientation relationship discovery and analysis options.