Effects of Aging Temperature, Time, and Pre-Strain on Mechanical Properties of AA7075
AUTOR(ES)
Kilic, Suleyman
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
12/09/2019
RESUMO
Aluminum alloys of the 7xxx series (AA7075) are preferred in the aerospace and automotive industries due to their low densities, high strength, good corrosion resistance properties. Additionally, these alloys show the most effective aging properties among aluminum alloys. For this reason, it is very important to determine the most appropriate aging parameters for microstructural development. Literature review reveals that the effect of pre-strain on springback has not been studied yet. In this study, the effects of aging temperature, time, and pre-strain on mechanical properties are investigated for AA7075. Precipitates present in solid solutions of AA7075 and their effects are examined. Results reveal that MgZn2 precipitation is not observed at aging temperatures of 120 and 160 ºC. After the formation of MgZn2 precipitates, microstructure becomes softer when aging continues at a higher temperature or longer period of time. It is clearly seen that pre-strain causes Portevin-Le Chatelier (PLC) effect after aging at 120 and 160 ºC for aging times of 30 and 90 minutes.
Documentos Relacionados
- Effect of Quenching Rate and Pre-strain on the Strain Ageing Behaviors of 7075 Aluminum Alloys
- Effects of Pre-Strain on the Evolution of Microstructure and Strain Hardening of Extruded Az31 Magnesium Alloy
- Avaliação da tixoconformabilidade das ligas AA7075 a AA7004
- Effects of temperature, time, and toxin concentration on lesion formation by the Escherichia coli hemolysin.
- Effects of sample holding time, temperature, and atmosphere on the isolation of Campylobacter jejuni from dogs.