PHASE TRANSFORMATION MECHANISMS IN BORON ALLOYED TI‐6AL‐4V WELD STUDIED USING BETA GRAIN RECONSTRUCTION
Paper in proceeding, 2024
To evaluate the effect of these efforts, effective methods to characterize the size and orientation of β grains over relatively large regions
are needed. In the present work the microstructure of a laser weld in cast Ti‐6Al‐4V alloy with 0.11 wt.% boron has been studied. Electron
back scatter diffraction technique was used to capture a low magnification orientation map of the alpha phase across different weld zones.
A method of prior β grain reconstruction based on Burgers orientation relationship was applied to study the prior β grain structure in the
different weld zones. The prior β grain reconstruction could be performed successfully and the reliability of the reconstruction was
evaluated. The fine microstructure in the weld zones together with low magnification resulted in a relatively low indexing rate in the
fusion zone and heat affected zone but this did not affect the quality of prior β grain reconstruction. Analysis of the variant selection and
orientation deviation in the reconstructed β grains can give information about the transformation mechanisms in the different weld zones.
boron
Grain refinement
EBSD
phase transformation
Author
Sakari Tolvanen
Chalmers, Industrial and Materials Science
Robert Pederson
University West
Uta Klement
Chalmers, Industrial and Materials Science, Materials and manufacture
Proceedings of the 15th Workd Conference in Titanium
14 24-29
Edinburgh, United Kingdom,
Areas of Advance
Production
Subject Categories (SSIF 2011)
Manufacturing, Surface and Joining Technology
Metallurgy and Metallic Materials
DOI
10.7490/f1000research.1119929.1