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High Temperature Mechanical Properties of an Extruded Mg–TiO 2 Nano‐Composite
Author(s) -
Safari Athar,
Mahmudi Reza
Publication year - 2015
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.201500132
Subject(s) - materials science , composite material , creep , composite number , microstructure , shear (geology) , direct shear test , shear strength (soil) , environmental science , soil science , soil water
The microstructure, high‐temperature shear strength, hot hardness, and creep resistance of pure Mg and its composite, reinforced with 1 vol% TiO 2 nano‐particles, were investigated. The shear yield stress (SYS) and ultimate shear strength (USS), measured by the shear punch test (SPT), together with hot hardness were evaluated in the temperature range 25–225 °C. Impression creep tests were performed at 150 °C and under punching stress of 225 MPa. Depending on the test temperature, the shear yield stress (SYS) increased by 4–10 MPa, and ultimate shear strength (USS) by 4–12 MPa in the composite material. Similarly, the hardness increased by 4–8, and impression rate decreased from 10 −4 to 0.3 × 10 −4 mm s −1 . This was attributed to the dispersive distribution of the nano‐sized TiO 2 particles in the Mg matrix.