Microstructural and Fractographic Analysis of Plastically Deformed Al-Zn-Mg Alloy Subjected to Combined High-Cycle Bending-Torsion Fatigue

Metals

Andrzej Kurek¹  Wojciech Jurczak²  Wojciech Ozgowicz³  Adam Grajcar³  Aleksander Kowalski⁴  Sonia Boczkal⁵ 

[1] Faculty of Mechanical Engineering, Opole University of Technology, 5 Mikołajczyka Street, 45-271 Opole, Poland;Faculty of Mechanical and Electrical Engineering, Polish Naval Academy, 69 Śmidowicza Street, 81-127 Gdynia, Poland;Institute of Engineering Materials and Biomaterials, Silesian University of Technology, 18A Konarskiego Street, 44-100 Gliwice, Poland;Institute of Non-Ferrous Metals, 5 Sowińskiego Street, 44-100 Gliwice, Poland;Light Metals Division, Institute of Non-Ferrous Metals, 19 Piłsudskiego Street, 32-050 Skawina, Poland;

关键词: aluminium alloy;    7003 alloy;    fatigue strength;    thermo-mechanical treatment;    TEM;    fractography;   

DOI  :  10.3390/met8070487

来源: DOAJ

【 摘 要 】

The present manuscript aims to determine the effect of various deformation levels during low-temperature thermo-mechanical treatment (LTTT) on the microstructure and fatigue strength of Zr-microalloyed Al-Zn-Mg alloy. The fatigue strength of the alloy was studied in high-cycle bending-torsion tests. The determination of the influence of plastic deformation level during LTTT on the microstructure was based on transmission electron microscopy (TEM) observations. The analysis of fracture after the fatigue tests was performed based on fractographic images using scanning electron microscopy (SEM). It was found that the major factor affecting the microstructure of the alloy, and determining the nature of fatigue fracture, is the strain level applied during LTTT.

【 授权许可】

Unknown