Heterogenous activation of dynamic recrystallization and twinning during friction stir processing of a Cu-4Nb alloy
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In: Journal of Alloys and Compounds, Vol. 928, 167007, 20.12.2022.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Heterogenous activation of dynamic recrystallization and twinning during friction stir processing of a Cu-4Nb alloy
AU - Escobar, Julian
AU - Gwalani, Bharat
AU - Olszta, Matthew
AU - Silverstein, Joshua
AU - Ajantiwalay, Tanvi
AU - Overman, Nicole
AU - Fu, Wenkai
AU - Li, Yulan
AU - Bergmann, Luciano
AU - Maawad, Emad
AU - Klusemann, Benjamin
AU - Santos, Jorge F. dos
AU - Devaraj, Arun
N1 - Publisher Copyright: © 2022
PY - 2022/12/20
Y1 - 2022/12/20
N2 - An interplay between high degree of shear deformation and deformation-induced heating occurs during friction stir processing (FSP) of metals. In medium-to-low stacking fault energy Cu alloys, this can lead to a complex spatially heterogenous activation of dynamic recrystallization (DRX) and twinning mechanisms. Within the Cu-Nb system, the presence of Nb is further expected to influence the DRX mechanism of the Cu matrix. However, the microstructural changes induced by the co-deformation of Nb during FSP are still not well understood. Therefore, this study uses a combination of multimodal microstructural characterization, solution thermodynamics-based predictions, and computational crystal plasticity simulation to reveal the various microstructural evolution mechanisms that can occur during FSP of a Cu-4at.%Nb binary model alloy. The formation of softer DRX zones, and harder shear localization regions are revealed using electron backscatter diffraction, transmission electron microscopy, atom probe tomography, and crystal plasticity modeling.
AB - An interplay between high degree of shear deformation and deformation-induced heating occurs during friction stir processing (FSP) of metals. In medium-to-low stacking fault energy Cu alloys, this can lead to a complex spatially heterogenous activation of dynamic recrystallization (DRX) and twinning mechanisms. Within the Cu-Nb system, the presence of Nb is further expected to influence the DRX mechanism of the Cu matrix. However, the microstructural changes induced by the co-deformation of Nb during FSP are still not well understood. Therefore, this study uses a combination of multimodal microstructural characterization, solution thermodynamics-based predictions, and computational crystal plasticity simulation to reveal the various microstructural evolution mechanisms that can occur during FSP of a Cu-4at.%Nb binary model alloy. The formation of softer DRX zones, and harder shear localization regions are revealed using electron backscatter diffraction, transmission electron microscopy, atom probe tomography, and crystal plasticity modeling.
KW - Engineering
KW - dynamic recrystallization
KW - twinning
KW - friction stir processing
KW - copper-niobium
KW - Copper-niobium
KW - Twinning
KW - Dynamic recrystallization
KW - Friction stir processing
KW - Copper-niobium
KW - Dynamic recrystallization
KW - Friction stir processing
KW - Twinning
UR - http://www.scopus.com/inward/record.url?scp=85138115772&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/93a799d6-ab5b-3603-8992-ed1fecc773b9/
U2 - 10.1016/j.jallcom.2022.167007
DO - 10.1016/j.jallcom.2022.167007
M3 - Journal articles
VL - 928
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
M1 - 167007
ER -