Microstructure of the passive layer formed on AA2024‐T3 aluminum alloy surface implanted with nitrogen

Abstract

This work is focused on a detailed analysis of passive layer formed on AA2024-T3 aluminum alloy, in unmodified and nitrogenimplanted conditions. This study is the first step in analyzing the possible beneficial effect of nitrogen implantation in the simultaneous improvement of the tribological properties and pitting resistance. The implanted surface has been characterized by XPS and atomic force microscopy (AFM), and SEM/EDX has been used for microstructural characterization. XPS depth profile of the implanted surface shows the formation of AlN through the implanted layer. AFM studies have confirmed the increase of the surface roughness of AA2024-T3 due to N + implantation. Another interesting result of the present work is the detection by EDX analysis, of implanted alloy of a specific concentration of the implanted nitrogen in Al-Cu-Fe-Mn-Si particles with regards to the other microstructural constituents.

Analysis and Comparison of Aluminum Alloy Welded Joints Between Metal Inert Gas Welding and Tungsten Inert Gas Welding

“…36,37 In addition, the spectrum also shows the N1s spectrum of low intensity indicating the presence of N-H bind, C-N bind and -NO 3 bind. 38 The main elements composition given by XPS is shown in Table 3. Since element composition of O and C accounts for the majority in the spectra, therefore, main contents of the surface contaminants are iden-ti¯ed as metal oxide and carbide, but not excluding the existence of organic compounds.…”

Repairing 2024 Aluminum Alloy via Electrospark Deposition Process: A Feasibility Study

“…It is commonly supplied in the T4 or T6 temper since such treatments give good mechanical properties. Generally, the 2024 parts used in aviation for damage tolerance applications, such as the lower wing skins and fuselage structure of commercial aircraft, usually easily undergo localized corrosion (i.e., pitting and exfoliation) especially in chloride-containing environment [6,7].…”