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3DXRD study of recrystallization process in multilayer aluminum alloys during brazing

Reference number
Coordinator SWERIM AB - Swerim AB, Kista
Funding from Vinnova SEK 500 000
Project duration November 2020 - May 2022
Status Ongoing
Venture Research infrastructure - utilisation and collaboration
Call Industrial pilot projects for utilisation of large-scale infrastructures for neutron and photon based techniques – 2020

Purpose and goal

Aluminum alloys offer unique strength, corrosion resistance, and thermal conductivity properties for heat exchangers. Braze clad allows a fast and convenient brazing assembly of different parts. A well-known problem is however penetration of brazing clad into the rest of the material that dramatically decreases the lifetime of the product. The goal of this project is to explore the recrystallization process in multilayer aluminum alloys, by monitoring the grain growth and texture evolution of a protective layer that can hinder the braze clad penetration during brazing.

Expected results and effects

The project is expected to deliver quantitative data on microstructure evolution during simulated brazing processes. The information will provide a better understanding of the material and conditions of the brazing and recrystallization process that is of great importance for Gränges. The results of this experiment are crucial to benchmark the parameters of the simulation tool that have been designed to predict the final product after brazing. The results will have a great impact on the design of new, sustainable, and environmentally friendly materials with improved efficiency.

Planned approach and implementation

3D-XRD experiment will be performed on ID11 beamline at the European Synchrotron Research Facility (ESRF) by representatives of Gränges and Swerim. Measurements will be performed for samples selected from different stages of recrystallization ex-situ, and during simulated brazing heat treatment in-situ. Ex-situ measurement will allow high-resolution mapping of the grains and the orientation while the material is recrystallizing and in-situ test will allow following the grain growth and texture evolution at a lower resolution but during recrystallization.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 21 May 2021

Reference number 2020-03787

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