Effects of Ageing and Cryo-ageing Treatments on Microstructure and Hardness Properties of AA2014-SiC MMCs

Aksoz S., Bostan B.

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, cilt.71, sa.8, ss.2035-2042, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 71 Sayı: 8
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s12666-018-1336-6
  • Dergi Adı: TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2035-2042
  • Anahtar Kelimeler: Ageing and cryo-ageing applicable Al alloys, MMC, Powder metallurgy, DEEP CRYOGENIC TREATMENT, MECHANICAL-PROPERTIES, DEFORMATION-BEHAVIOR, ROOM-TEMPERATURE, WEAR-RESISTANCE, ALUMINUM-ALLOYS, STEEL, PERFORMANCE
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, microstructure and hardness effects of cryogenic and ageing heat treatments applied to AA2014-SiC composites containing vol. 0.5, 1, 2 and 4% SiC reinforcing ratio have been investigated. SEM, EDS, XRD and MAP analyses have been used in the determination of microstructural properties. Macro hardness measurements have been implemented for the investigation of hardness effects. Through the dissolution and cryogenic processes applied, alloying elements such as Cu, which has a direct effect on the formation of secondary phase in the structure, can be homogeneously dispersed in the microstructure. It has been also found that there is a significant increase in the hardness level due to the applied cryogenic treatment. A significant homogenous distribution of alloys is obtained in the MAP analysis after the cryogenic process. This is the reason why the cryogenic cooling process can be working dynamically, especially in ageing applicable alloys.