Microstructural development of as-cast AM50 during Constrained Friction Processing: grain refinement and influence of process parameters

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Mg and its alloys have a wide range of structural applications despite the limitations regarding the workability and low ductility associated with its hexagonal closed-packed structure. The Constrained Friction Processing (CFP) is a novel processing technique, developed based on the refill friction stir spot welding process, that has been proposed as an interesting alternative that can help to overcome challenges associated with the processing of Mg and its alloys. This technique is shown to be able to produce homogenous fine-grained rods. Correlation between processing conditions and the evolved microstructure, i.e. texture and grain size, were established for AM50 rods. In the center, the produced rods present a strong B-fiber texture. As the distance from the center changes along the radial direction, there is a progressive outward tilt of the 〈0001〉 because of specific flow conditions during the processing. CFP is shown to be able to produce fine-grained rods with grain sizes comparable with other severe plastic deformation techniques, with advantages like no requirement of additional preheating and short processing times.
Original languageEnglish
Article number118018
JournalJournal of Materials Processing Technology
Publication statusPublished - 01.09.2023

Bibliographical note

Funding Information:
The authors are grateful to Prof. Dr. Norbert Hort, Mr. Günter Meister and Mr. Gert Wiese from Helmholtz-Zentrum Hereon, Institute of Metallic Biomaterials, for the provision of the ingots used in this study and the use of the metallographic preparation facilities. The author also would like to acknowledge Mr. Menno Peters and Mr. Ting Chen, from Helmholtz-Zentrum Hereon, Institute of Materials Mechanics, respectively for technical support and experimental assistance.

Publisher Copyright:
© 2023 Elsevier B.V.

    Research areas

  • Constrained Friction Processing, solid-state processing, Mg alloys, microstructure, texture, grain refinement
  • Engineering