TY - JOUR
T1 - Influence of Fe and Mn on the Microstructure Formation in 5xxx Alloys—Part I: Evolution of Primary and Secondary Phases
AU - Grasserbauer, Jakob
AU - Weißensteiner, Irmgard
AU - Falkinger, Georg
AU - Kremmer, Thomas
AU - Uggowitzer, Peter
AU - Pogatscher, Stefan
N1 - Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/6/2
Y1 - 2021/6/2
N2 - The increasing demands for Al sheets with superior mechanical properties and excellent forma-bility require a profound knowledge of the microstructure and texture evolution in the course of their production. The present study gives a comprehensive overview on the primary- and sec-ondary phase formation in AlMg(Mn) alloys with varying Fe and Mn additions, including varia-tions in processing parameters such as solidification conditions, homogenization temperature, and degree of cold rolling. Higher Fe alloying levels increase the primary phase fraction and favor the needle-shaped morphology of the constituent phases. Increasing Mn additions alter both the shape and composition of the primary phase particles, but also promote the formation of dispersoids as secondary phases. The size, morphology, and composition of primary and secondary phases is further affected by the processing parameters. The average dispersoid size increases significantly with higher homogenization temperature and large primary particles tend to fragment during cold rolling. The microstructures of the final soft annealed states reflect the important effects of the primary and secondary phase particles on their evolution. The results presented in this paper regarding the relevant secondary phases provide the basis for an in-depth discussion of the mechanisms underlying the microstructure formation, such as Zener pinning, particle stimulated nucleation, and texture evolution, which is presented in Part II of this study.
AB - The increasing demands for Al sheets with superior mechanical properties and excellent forma-bility require a profound knowledge of the microstructure and texture evolution in the course of their production. The present study gives a comprehensive overview on the primary- and sec-ondary phase formation in AlMg(Mn) alloys with varying Fe and Mn additions, including varia-tions in processing parameters such as solidification conditions, homogenization temperature, and degree of cold rolling. Higher Fe alloying levels increase the primary phase fraction and favor the needle-shaped morphology of the constituent phases. Increasing Mn additions alter both the shape and composition of the primary phase particles, but also promote the formation of dispersoids as secondary phases. The size, morphology, and composition of primary and secondary phases is further affected by the processing parameters. The average dispersoid size increases significantly with higher homogenization temperature and large primary particles tend to fragment during cold rolling. The microstructures of the final soft annealed states reflect the important effects of the primary and secondary phase particles on their evolution. The results presented in this paper regarding the relevant secondary phases provide the basis for an in-depth discussion of the mechanisms underlying the microstructure formation, such as Zener pinning, particle stimulated nucleation, and texture evolution, which is presented in Part II of this study.
UR - http://www.scopus.com/inward/record.url?scp=85108646318&partnerID=8YFLogxK
U2 - 10.3390/ma14123204
DO - 10.3390/ma14123204
M3 - Article
SN - 1996-1944
VL - 14.2021
JO - Materials
JF - Materials
IS - 12
M1 - 3204
ER -