MECHANICAL PROPERTIES OF A PRESSED PIECE EN AW 2618A Al–ALLOY AFTER HEAT TREATMENT

Materiálové Inžinierstvo

关键词: Thermal Treatment;    Ageing;    Aluminium Alloy 2618A;    Secondary Particles Strength Properties;   

DOI  :  

来源: DOAJ

【 摘 要 】

The aim of this contribution is to find out the influence of thermal treatment and small cold work on the microstructure and mechanical properties in the cross section of the EN AW 2618A Al – alloy. Four types of secondary particles were identified in the experimental alloy. Major portion in secondary particles is occupied by Al3NiFe particles, which are up to 5 µm large. Secondary particles Al3NiFe and AlCuNi are not soluble enough during the thermal treatment. The strength properties of the experimental Al - alloy are influenced most of all by precipitation hardening - ageing. The thermal treatment containing solution annealing and next artificial ageing increased the tensile strength 52% above the prime state value. The combined treatment containing solution annealing, cold work and artificial ageing resulted the increase of strength 59.4 %.

【 授权许可】

Unknown