Microstructures of Friction Surfaced Coatings – a TEM Study
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J. Akram
Abstract
The microstructures of dissimilar metal welds between 9Cr-1Mo (Modified) (P91) and austenitic stainless steel (AISI 304) with Ni-based alloy interlayers (Inconel 625, Inconel 600 and Inconel 800H) are reported. These interlayers were deposited by the friction surfacing method one over the other on P91 alloy, which was finally friction welded to AISI 304. In this paper, the results of microstructural evolution in the friction surfaced coated interlayers (Inconel 625, 600, 800H) are reported. For comparative purposes, the microstructures of consumable rods (Inconel 625, 600, 800H) and dissimilar metal base metals (P91 and AISI 304) were also reported. Friction surfaced coatings exhibited dynamic recrystallization. In friction surfaced coatings, the carbide particles were found to be finer and distributed uniformly throughout the matrix, compared to their rod counterparts.
Kurzfassung
Die Untersuchung beschäftigt sich mit dem Gefüge von Mischschweißverbindungen von 9Cr-1Mo (modifiziert) (P91) und rostfreiem austenitischem Stahl (AISI 304) mit Zwischenlagen aus einer Ni-Basislegierung (Inconel 625, Inconel 600 und Inconel 800H). Diese Zwischenlagen wurden, eine Lage nach der anderen, durch Reibauftragschweißen auf eine P91-Legierung aufgebracht, die schließlich mit AISI 304 reibverschweißt wurde. Diese Arbeit beschäftigt sich mit der Gefügeentwicklung in den durch Reibauftragschweißen aufgetragenen Zwischenlagen (Inconel 625, 600, 800H). Zu Vergleichszwecken geht die Arbeit ebenfalls auf die Gefüge von abschmelzenden Stäben (Inconel 625, 600, 800H) und unterschiedlichen Grundwerkstoffen (P91 und AISI 304) ein. In den durch Reibauftragschweißen aufgetragenen Beschichtungen setzte eine dynamische Rekristallisationen ein. Im Vergleich zum Stangenmaterial waren die Carbidteilchen darin feiner und lagen gleichmäßig verteilt in der Matrix vor.
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Articles in the same Issue
- Contents/Inhalt
- Contents
- Editorial
- Editorial
- Technical Contributions/Fachbeiträge
- Microstructures of Friction Surfaced Coatings – a TEM Study
- Copper-Coated Roman Coins – Subferrati
- Fretting Induced Fracture Damage in a Ti6Al4V Total Hip Prosthesis
- Meeting Diary/Veranstaltungskalender
- Meeting Diary
Articles in the same Issue
- Contents/Inhalt
- Contents
- Editorial
- Editorial
- Technical Contributions/Fachbeiträge
- Microstructures of Friction Surfaced Coatings – a TEM Study
- Copper-Coated Roman Coins – Subferrati
- Fretting Induced Fracture Damage in a Ti6Al4V Total Hip Prosthesis
- Meeting Diary/Veranstaltungskalender
- Meeting Diary
