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Microstructure, Mechanical, and Impression Creep Properties of AlMg5–0.5 vol% Al 2 O 3 Nanocomposites
Author(s) -
Talari Mahesh Kumar,
Kishore Babu N.,
Kallip Kaspar,
Leparoux Marc,
Koller Roland E.,
AlOgab Khaled A.,
Maeder Xavier
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600301
Subject(s) - materials science , creep , microstructure , impression , nanocomposite , composite material , computer science , world wide web
Microstructural and impression creep properties of hot pressed bulks made from unmilled AlMg5 powders, milled AlMg5, and AlMg5 powders milled with 0.5 vol% of Al 2 O 3 nanoparticles are investigated. Microstructural, high‐temperature impression creep, and high‐temperature tensile properties investigation is carried out. Activation energies and stress exponent values are determined from the steady state creep rate obtained at different temperatures and creep stresses. AlMg5–0.5 vol% Al 2 O 3 samples display superior strength values at 298 K compared to unmilled AlMg5 and milled AlMg5 samples. However, AlMg5–0.5 vol% Al 2 O 3 nanocomposite exhibits higher creep rate and tensile elongation with a decrease in strength at 473 K due to activation of grain boundary sliding mechanism.