TY - CHAP

T1 - Material flow during constrained friction processing and its effects on the local properties of AM50 rods

AU - Caroline de Castro, Camila

AU - Chen, Ting

AU - de Campos Fernandes, Diogo

AU - Klusemann, Benjamin

N1 - Publisher Copyright: © 2025, Association of American Publishers. All rights reserved.

PY - 2025

Y1 - 2025

N2 - 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.

AB - 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.

KW - Constrained Friction Processing

KW - Magnesium Alloy

KW - Material Flow

KW - Mechanical Behavior

KW - Severe Plastic Deformation

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=105008061050&partnerID=8YFLogxK

U2 - 10.21741/9781644903599-191

DO - 10.21741/9781644903599-191

M3 - Article in conference proceedings

AN - SCOPUS:105008061050

SN - 9781644903599

T3 - Materials Research Proceedings

SP - 1777

EP - 1785

BT - 28th International ESAFORM Conference on Material Forming, ESAFORM 2025

A2 - Carlone, Pierpaolo

A2 - Filice, Luigino

A2 - Umbrello, Domenico

PB - Association of American Publishers

T2 - 28th International ESAFORM Conference on Material Forming, ESAFORM 2025

Y2 - 7 May 2025 through 9 May 2025

ER -