Details

Autor(en) / Beteiligte

• Kang, H.
• Choi, K.M.
• Bae, D.H.

Titel

Enhancement of creep resistance of pure magnesium by magnesiothermic reaction with TiO2 nanoparticles

Ist Teil von

• Materials letters, 2022-10, Vol.324, p.132583, Article 132583

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Improvement of creep resistance with magnesiothermic reaction via oxide particle.•Creep resistance effect by MgO particle, induced by decomposed O atoms from TiO2.•Lattice diffusion leading the creep of alloy with stress exponent approaching 1.•Limited coble creep with MgO nanoparticles at high stresses and low temperatures. The creep resistance of magnesium used in powertrain components of automotive is one of the most considerable mechanical properties. The metallic oxide particles using a magnesiothermic reaction in the Mg matrix can effectively improve the creep resistance. The MgO nanoparticles produced by oxygen atoms decomposed from embedded TiO2 nanoparticles in the Mg matrix effect on the creep resistance is investigated. The magnesium revealed a stress exponent close to 1, which indicates that the dominant creep may occur via lattice diffusion, as well as the nanoparticles formed at the grain boundaries during creep deformation suppress Coble creep even when relatively high stresses (30–70 MPa) are applied at low temperatures (70–150 °C).