Material flow during constrained friction processing and its effects on the local properties of AM50 rods

Publikation: Beiträge in SammelwerkenAufsätze in KonferenzbändenForschungbegutachtet

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Constrained friction processing (CFP) is a novel technique for producing fine-grained rods from lightweight materials such as aluminum and magnesium alloys. In this process, a rotating shoulder is plunged into the base material, extruding it into the shoulder’s cavity while being constrained by the rotating probe. The resulting shear forces and heat generation induce metallurgical transformations, such as dynamic recrystallization, promoting grain refinement. Magnesium rods processed by CFP exhibit a characteristic ultrastrong texture because of the anisotropy of the hexagonal close-packed structure. In this study, the material flow during CFP of AM50 was analyzed based on local texture variations along the rod, determined using electron backscatter diffraction. The resulting mechanical behavior was evaluated using Vickers micro hardness and quasi-static tensile tests on samples taken from two positions along the rod. The results show a strong dependence of local mechanical properties on the texture and anisotropy of the processed material. Significant improvements in ductility were observed, especially in the outer regions of the rod along the plunging direction, showing an elongation at break determined at 47%. This highlights the critical role of CFP-induced texture in determining mechanical properties and indicate the possibility of texture tailoring achieved by the control of critical process parameters that rules the material flow.

OriginalspracheEnglisch
Titel28th International ESAFORM Conference on Material Forming, ESAFORM 2025
HerausgeberPierpaolo Carlone, Luigino Filice, Domenico Umbrello
Anzahl der Seiten9
VerlagAssociation of American Publishers
Erscheinungsdatum2025
Seiten1777-1785
ISBN (Print)9781644903599
DOIs
PublikationsstatusErschienen - 2025
Veranstaltung28th International ESAFORM Conference on Material Forming, ESAFORM 2025 - Paestum, Italien
Dauer: 07.05.202509.05.2025

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DOI