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Physics of Metals and Metallography

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01.08.2019 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

Microstructure of a Laser-Welded Joint between a Chromium–Nickel Steel and a Titanium Alloy with a Copper Insert

verfasst von: N. B. Pugacheva, E. I. Senaeva, E. G. Volkova, A. V. Makarov, L. S. Goruleva

Erschienen in: Physics of Metals and Metallography | Ausgabe 8/2019

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Abstract

The microstructure of a laser-welded joint between a chromium–nickel austenitic steel and a titanium alloy with an intermediate copper insert has been studied. Using X-ray diffraction analysis, energy-dispersive X-ray microanalysis, and transmission electron microscopy, it has been shown that the welded joint represents a copper-based solid solution with intermetallic particles of (Fe,Cr)₂Ti and Cu₃Ti 10–50 μm in size, which were the first to crystallize in the welding pool, and intermetallic particles of (Fe,Cr)₂Ti and Cu₄Ti with a size of no more than 30 nm, which homogeneously precipitate on cooling from the copper-based solid solution oversaturated at the moment of crystallization. The fracture of the joint upon tensile tests occurred along the diffusion zone at the boundary with the titanium alloy. The maximum ultimate tensile strength of such a joint was 474 MPa.

Vorheriger Artikel Dilatometric Study of the Formation of Martensite and of the Effects of Stabilization of Austenite in High-Chromium Pipe Steel

Nächster Artikel Dynamic Scenarios of the Formation of Martensite with the {110} Habits in the Ni50Mn50 Alloy

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Titel: Microstructure of a Laser-Welded Joint between a Chromium–Nickel Steel and a Titanium Alloy with a Copper Insert
verfasst von: N. B. Pugacheva
E. I. Senaeva
E. G. Volkova
A. V. Makarov
L. S. Goruleva
Publikationsdatum: 01.08.2019
Verlag: Pleiades Publishing
Erschienen in: Physics of Metals and Metallography / Ausgabe 8/2019
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI: https://doi.org/10.1134/S0031918X1908012X

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