Relationship between microstructure and corrosion performance of AA2050-T8 aluminium alloy after excimer laser surface melting

被引：40

作者：

Viejo, F. ^{[1
]}

Coy, A. E. ^{[1
]}

Garcia-Garcia, F. J. ^{[1
]}

Skeldon, Z. Liu P. ^{[1
]}

Thompson, G. E. ^{[1
]}

机构：

[1] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M60 1QD, Lancs, England

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

Aluminium; Polarisation; Pitting corrosion; Intergranular corrosion; PROBE FORCE MICROSCOPY; LOCALIZED CORROSION; PITTING CORROSION; BEHAVIOR; AA2024-T3; MECHANISM; PHASE; MG;

D O I：

10.1016/j.corsci.2010.03.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface modification by excimer laser surface melting (LSM) has been performed with the aim to improve the corrosion resistance of the AA2050-T8 alloy. LSM produced melted surfaces, largely free of precipitates, with both microstructure and corrosion behaviour depending upon the number of laser pulses employed. Increased number of laser pulses resulted in thicker melted layers, but also in greater trapped porosity and formation of micro-cracks at the overlapping area. Nevertheless, the LSM-treated specimens exhibited enhanced corrosion resistance compared to the untreated alloy, which was associated with the formation of a relatively uniform melted layer and a diminished presence of precipitates. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2179 / 2187

页数：9

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