Characterization of Hot Deformation Behavior of Nanosized Al₂O₃ Reinforced Al6061 Composites

The hot deformation behavior of Al6061/Nano-Al₂O₃ composites were investigated at temperatures of 300 to 500 °C and strain rates of 0.001∼1/s using compression tests. The composite fabricated by the infiltration method consisted of an Al matrix and Al₂O₃ particles with a mean size of 200 nm. Interestingly, the true stress-true strain curves under all compressive conditions showed a peak stress at the initial stages of deformation, in which the peak stress increased with decreasing temperature and faster strain rate. The Z parameter, which is known as the temperature-compensated strain rate showed a linear relationship with the flow stress. The hot deformation mechanism is believed to occur through dynamic recrystallization, where fine equiaxed grains and dislocations were observed at the deformed specimens. A processing map was applied to evaluate the hot workability and flow instability region to determine the optimal deformation conditions of the composite.

Medienart:

E-Artikel

Erscheinungsjahr:

2019

Erschienen:

2019

Enthalten in:

Zur Gesamtaufnahme - volume:19

Enthalten in:

Journal of nanoscience and nanotechnology - 19(2019), 7 vom: 01. Juli, Seite 3929-3934

Sprache:

Englisch

Beteiligte Personen:

Yeon, Kyu Ho [VerfasserIn]
Park, Hyun Soon [VerfasserIn]
Kim, Mok Soon [VerfasserIn]
Yu, Seung Baek [VerfasserIn]
Lee, Jeong Keun [VerfasserIn]

Links:

Volltext

Themen:

Journal Article
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 02.06.2021

Date Revised 02.06.2021

published: Print

Citation Status PubMed-not-MEDLINE

doi:

10.1166/jnn.2019.16144

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM293904693