Combined nuclear microprobe and TEM study of corrosion pit nucleation by intermetallics in aerospace aluminium alloys

被引：18

作者：

Boag, AP

McCulloch, DG

Jamieson, DN

Hearne, SM

Hughes, AE

Ryan, CG

Toh, SK

机构：

[1] RMIT Univ, Sch Appl Sci, Melbourne, Vic 3001, Australia

[2] Univ Melbourne, Sch Phys, Microanalyt Res Ctr, Parkville, Vic 3010, Australia

[3] CSIRO, Div Mfg & Infrastruct Technol, Clayton, Vic 3169, Australia

[4] CSIRO, Div Explorat & Min, Clayton, Vic 3168, Australia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2005年 / 231卷

关键词：

pitting corrosion; aluminium alloys; PIXE; nuclear microprobe; TEM; EELS;

D O I：

10.1016/j.nimb.2005.01.100

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A microscopic study of the onset of pitting corrosion has been conducted on the important aerospace alloy AA2024-T3 with the aim of understanding the role of intermetallic particles in triggering the formation of deep pits in the corroding surface. By trace element and correlation mapping using a 3 MeV H+ microprobe, it has been shown that Cu-Fe-Mn-Al particles in conjunction with S-phase particles have a high correlation with pit nucleation. Al-Cu correlation diagrams can be used to show dealloying of S-phase particles (CuMgAl2). Transmission electron microscopy and elemental mapping were used to look at the distribution of elements, particularly Cu, within pits. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：457 / 462

页数：6

共 7 条

[1] Local dissolution phenomena associated with S phase (Al2CuMg) particles in aluminum alloy 2024-T3 [J].