Quasi-continuous-wave laser surface melting of aluminium alloy: Precipitate morphology, solute segregation and corrosion resistance

Luo, Guoyun1; Xiao, Hui1; Li, Simeng1; Wang, Cunshan2; Zhu, Qiang3; Song, Lijun1,4

2019-05-15

10.1016/j.corsci.2019.01.035

CORROSION SCIENCE   影响因子和分区

0010-938X

1879-0496

A quasi-continuous-wave laser surface melting is performed on 2219 aluminium alloys to improve the corrosion resistance. The fast cooling rate and the multi-directional solidification behavior of the process transform large and long-chained constituent particles into fine and isolated circular precipitates with alleviated solute segregation. The improved corrosion resistance is due to the formation of low-flaw-density passive film, the reduction of the driving force for corrosion and the improvement of the re-passivation capability of the modified surface. The large and long-chained constituent particles are the preferred sites for corrosion initiation and propagation.

Aluminium EPMA Polarization Pitting corrosion Segregation

SCI ; EI

英语

其他

State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body at Hunan University, China[71775005] ; State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body at Hunan University, China[31665005]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000466822200012

PERGAMON-ELSEVIER SCIENCE LTD

20191206644585

Aluminum alloys ; Continuous wave lasers ; Corrosion resistance ; Corrosion resistant alloys ; Melting ; Pitting ; Precipitation (chemical) ; Segregation (metallography) ; Surface segregation

Metallography:531.2 ; Metals Corrosion:539.1 ; Aluminum Alloys:541.2 ; Lasers, General:744.1 ; Chemical Operations:802.3 ; Atomic and Molecular Physics:931.3 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Hunan Univ, Hunan Prov Key Lab Intelligent Laser Mfg, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China
2.Dalian Univ Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
4.Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China

Luo, Guoyun,Xiao, Hui,Li, Simeng,et al. Quasi-continuous-wave laser surface melting of aluminium alloy: Precipitate morphology, solute segregation and corrosion resistance[J]. CORROSION SCIENCE,2019,152:109-119.

Luo, Guoyun,Xiao, Hui,Li, Simeng,Wang, Cunshan,Zhu, Qiang,&Song, Lijun.(2019).Quasi-continuous-wave laser surface melting of aluminium alloy: Precipitate morphology, solute segregation and corrosion resistance.CORROSION SCIENCE,152,109-119.

Luo, Guoyun,et al."Quasi-continuous-wave laser surface melting of aluminium alloy: Precipitate morphology, solute segregation and corrosion resistance".CORROSION SCIENCE 152(2019):109-119.