Microstructural evolution during tension-compression in-plane deformation of a pure aluminum sheet

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

Härtel, M.^1 ; Bohne, B.^1 ; Wagner, M.F.-X.^1

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

09125, Germany^1

关键词: Bauschinger effects;    Compressive loading;    In-plane deformation;    Micro-structural observations;    Microstructural investigation;    Pure aluminum sheet;    Tensioncompressions;    Tension compression tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/181/1/012024/pdf
DOI  :  10.1088/1757-899X/181/1/012024

来源: IOP

【 摘 要 】

Classically, the Bauschinger effect refers to a reduction of yield strength after a load path change. In this contribution, we present results of an experimental and microstructural investigation on Bauschinger effects in an AA1050 sheet metal (with 1 mm thickness) subjected to in-plane uniaxial loading. We performed tension-compression tests with different values of maximum tensile strains in a novel tool that was specifically designed to avoid buckling under compressive loading. Our experimental results show that the sheet material exhibits distinct Bauschinger effects. At different stages of deformation, we interrupted the tests and prepared samples for transmission electron microscopy. Our microstructural observations allow rationalizing the occurrence and magnitude of the observed Bauschinger effects.