| Popis: |
The paper present theoretical and practical aspects concerning to the phenomena of thermal / mechanical fatigue specific to metallic materials, which are found in the structure of industrial parts, subjected to thermal and mechanical requests, also in combination with the corrosion phenomenon, pressure different etc. The analyzed alloys subjected to thermal and mechanical fatigue requests, on a prototype testing installation, using samples from Cu-Zn-Al alloys, which have been processed at standard dimensions by machining. Function of chemical composition of alloy, after a variable number of cycles it was found the micro-cracks appearance that generates crack and finally the break of samples. The SEM realized at different magnifications, highlight the character of samples break. |
