Experimental and numerical investigation of the residual yield strength of aluminium alloy EN AW-2024-T3 affected by artificially produced pitting corrosion

19th Chemnitz Seminar on Materials Engineering – 19. Werkstofftechnisches Kolloquium

Pippig, R.^1 ; Schmidl, E.^1 ; Steinert, P.^2 ; Schubert, A.^2 ; Lampke, T.^1

Institute of Materials Science and Engineering, Chemnitz University of Technology, Chemnitz

09125, Germany^1

Prof. Micromanufacturing Technology, Institute for Machine Tools and Production Processes, Chemnitz University of Technology, Chemnitz

09126, Germany^2

关键词: Corrosion pits;    Corrosion tests;    Critical defects;    Laser microstructuring;    Laser scanning microscopy;    Numerical investigations;    Strength reduction;    Uniaxial tensile test;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012023/pdf
DOI  :  10.1088/1757-899X/181/1/012023

来源: IOP

【 摘 要 】

In this study, the behaviour of the residual yield strength of aluminium alloy EN AW-2024-T3 affected by the morphology and numbers of corrosion pits (defects) is presented. Since specific defect structures are not reproducible during experimental corrosion tests, metal sheets with different numbers of pits and pit shapes are produced using laser micro structuring. The defect structures are measured using laser scanning microscopy. To compare the stress states of the micro structured and real corroded metal sheets, FE-analysis is used. Afterwards, uniaxial tensile tests are carried out and critical defect parameters in terms of yield strength reduction of the investigated aluminium alloy are detected.