Surface phenomena in a precipitation-hardenable nickel–chromium alloy during multiple heating/cooling

Time-of-flight secondary ion mass spectrometry profiling, scanning transmission electron microscopy, and energy dispersive X-ray mapping were used to investigate physical and chemical processes on the surface of a precipitation-hardenable nickel–chromium alloy associated with single or multiple heat...

Full description

Saved in:
Bibliographic Details
Published in:Thin solid films 2015-09, Vol.591, p.311-315
Main Authors: Adamiak, Stanislaw, Berchenko, Nicolas, Bochnowski, Wojciech, Dziedzic, Andrzej, Trzyna, Malgorzata, Fadeyev, Sergey, Cebulski, Josef
Format: Article
Language:English
Subjects:
Cooling
Grain boundaries
Heating
Heating/cooling cycle
High angle annular dark field scanning transmission electron microscopy
Inclusions
Nickel base alloys
Nickel–chromium alloy
Niobium nitride
Nitrides
Oxidation
Oxides
Secondary ion mass spectrometry
Time-of-flight secondary ion mass spectroscopy
Titanium nitride
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Time-of-flight secondary ion mass spectrometry profiling, scanning transmission electron microscopy, and energy dispersive X-ray mapping were used to investigate physical and chemical processes on the surface of a precipitation-hardenable nickel–chromium alloy associated with single or multiple heating/cooling cycles that simulate typical service conditions of aircraft products made of such alloys. Research findings show the growth of oxide, increase of surface roughness, and microstructural changes. The depth distribution of main metal oxides is discussed. It was determined that aluminum diffusing along the alloy grain boundaries forms an oxide on the surface and intergranular Al2O3. The Ti and Nb nitride inclusions were found to appear after the first oxidation cycle. •Multiple heating/cooling cycles increase oxide thickness and surface roughness.•The microstructure changes under multiple heating/cooling.•Metal distribution in the oxide is formed mainly after the first heating/cooling.•Ti and Nb nitride inclusions were found in the oxide layer.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2015.03.020