Impact of friction stir welding-like heat cycles on precipitates in AA7050 analysed by SAXS and numerical modelling
Research output: Journal contributions › Journal articles › Research › peer-review
Standard
In: Materialia, Vol. 39, 102343, 01.03.2025.
Research output: Journal contributions › Journal articles › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Impact of friction stir welding-like heat cycles on precipitates in AA7050 analysed by SAXS and numerical modelling
AU - Henninger, Susanne
AU - Chafle, Rupesh
AU - Maawad, Emad
AU - Klusemann, Benjamin
AU - Müller, Martin
AU - Staron, Peter
N1 - Publisher Copyright: © 2025 The Authors
PY - 2025/3/1
Y1 - 2025/3/1
N2 - Precipitation kinetics in AA7050 during heat cycles as they occur in friction stir welding (FSW) were studied via small-angle X-ray scattering (SAXS), X-ray diffraction (XRD) and numerical modelling using the PanPrecipitation software. Reversion experiments were conducted for the calibration of the used model and the reversion stages of dissolution, growth and coarsening of precipitates are successfully modelled. Additionally, reversion experiments on an AA7108 alloy from literature data were modelled, affirming that other AA7xxx alloys can be described with the developed model as well. The model was used to predict precipitation kinetics in AA7050-T7451 during heat cycles typically occurring in FSW, enabling the prediction of the evolution of volume fraction and precipitate size distribution of η-precipitates at elevated temperatures, matching experimental results. For instance, with increasing temperature, stronger coarsening as well as lower final volume fractions are expected. Finally, the influence of maximum temperature and welding speed on the precipitate size distribution was studied, providing guidelines for temperature-driven process design.
AB - Precipitation kinetics in AA7050 during heat cycles as they occur in friction stir welding (FSW) were studied via small-angle X-ray scattering (SAXS), X-ray diffraction (XRD) and numerical modelling using the PanPrecipitation software. Reversion experiments were conducted for the calibration of the used model and the reversion stages of dissolution, growth and coarsening of precipitates are successfully modelled. Additionally, reversion experiments on an AA7108 alloy from literature data were modelled, affirming that other AA7xxx alloys can be described with the developed model as well. The model was used to predict precipitation kinetics in AA7050-T7451 during heat cycles typically occurring in FSW, enabling the prediction of the evolution of volume fraction and precipitate size distribution of η-precipitates at elevated temperatures, matching experimental results. For instance, with increasing temperature, stronger coarsening as well as lower final volume fractions are expected. Finally, the influence of maximum temperature and welding speed on the precipitate size distribution was studied, providing guidelines for temperature-driven process design.
KW - Aluminum alloy
KW - Friction stir welding
KW - Modelling
KW - Pandat
KW - Precipitation
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85216501986&partnerID=8YFLogxK
U2 - 10.1016/j.mtla.2025.102343
DO - 10.1016/j.mtla.2025.102343
M3 - Journal articles
AN - SCOPUS:85216501986
VL - 39
JO - Materialia
JF - Materialia
SN - 2589-1529
M1 - 102343
ER -