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Technological Alloying Impact on Formation of Phase Composition of Al-Fe-Si-X Alloys. [PDF]

Materials (Basel)
Andreyachshenko V, Kunčická L.
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Corrosion behavior for Alloy 690 and Alloy 800 tubes in simulated primary water

Corrosion Science, 2013
Abstract Corrosion behavior for Alloy 690 and Alloy 800 in simulated primary water is studied by open-circuit potential (OCP) measurement, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. Rise of pressure and temperature lead to negative shift of corrosion potential for both Alloy 690 and Alloy 800. EIS results show that
Xiaohui Li, Jianqiu Wang, En-Hou Han, Wei Ke   +3 more
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Carbide Faceting in Alloy 690: HRTEM Study

Materials Performance and Characterization, 2020
Abstract Alloy 690 (Unified Numbering System [UNS] No. 6690) in thermally treated (TT) condition is an advanced steam generator tubing material that offers high corrosion resistance with tailored carbide morphology and chromium concentration adjacent to the grain boundary.
Sumita Santra, S. V. Ramana Rao, K. Kapoor, D. Srivastava   +3 more
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Microstructural characterization of inconel alloy 690

Proceedings, annual meeting, Electron Microscopy Society of America, 1988
Inconel 690 is a nickel-base superalloy which, because of its superior corrosion resistance, is being considered as a substitute for Inconel 600. The composition of Alloy 690 is nominally 30wt.%Cr-10wt.%Fe-0.3wt.%Ti-bal Ni. This alloy is generally used in the thermally treated condition: solution anneal in the range 1030-1120*C for ∼0.07-lh followed by
M. G. Burke, B. Z. Hyatt
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New Etching Procedure for Alloy 690 Ein neues Ätzverfahren für die Legierung 690

Practical Metallography, 1998
Alloy 690 for steam generator tubing is now etched in bromine-methanol for the microstructural examination prior to delivery. A number of etching methods have been tested to find an alternative procedure that is highly reproducible, that clearly reveals all grain boundaries and carbides and that does not involve too harmful chemicals.
Agneta Östberg, Johan Frodigh
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Corrosion Performance of Alloy 690

CORROSION 1989, 1989
Abstract Alloy 690 steam generator tubing with continuous grain boundary carbides has consistently the lowest caustic stress corrosion rates at 332-343°C. This microstructure is effected by mill annealing at >1050°C and subsequent thermal treatment for 5-20 h at 725°C.
R. G. Aspden, T. F. Grand, D. L. Harrod
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Microstructural and corrosion aspects of alloy 690

British Corrosion Journal, 1999
AbstractUndissolved particles in alloy 690 were identified as titanium nitrides with a hexagonal crystal structure. On subsequent thermal treatment of the alloy these inclusions were found to act as preferred sites for the precipitation of chromium carbide.
R.S. Dutta, R. Tewari
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