Thermal stability of nanocrystallized surface produced by surface mechanical attrition treatment in aluminum alloys

Effects of Warm Laser Peening on Thermal Stability and High Temperature Mechanical Properties of A356 Alloy

“…In addition, the Si particles on the surface were significantly refined and balled. Chang [14,15] investigated the mechanical properties and thermal stability of A356 alloy treated by surface alloying technology. The results showed that a nano-grain structure was discovered in the treated area after 60 min, the size of which was about 18 nm.…”

Cold-spray coatings on magnesium and its alloys

“…The insert selected area diffraction pattern taken from the adjacent area to the interface indicates the formation of sub-grains in the localized area. The grain refinement mechanism is attributed to dislocation movements (double slip and/or cross-slip) that divide coarse grains into smaller ones (Canova, Fressengeas, Molinari, & Kocs, 1988;Chang, Kelly, Shi, & Zhang, 2012). 14.4.2.2 High-resolution TEM observation of the interfacial structure between Al coating and Mg substrate When a spherical Al particle impacts on the substrate, the first contact point between the centre of the particle and the substrate surface underwent normal compressive strain. As the strain increased, the contact area was enlarged along the direction that is normal to the impact direction.…”

Corrosion in biomass combustion: A materials selection analysis and its interaction with corrosion mechanisms and mitigation strategies

“…While room temperature investigations are commonly carried out to assess the performance of nanocrystalline metallic surfaces against corrosion, high temperature studies have been hardly reported. It is generally agreed that the properties of nanocrystalline surfaces depend on their thermal stabilities [169]. It is well-known that nanocrystalline materials have an excess of free energy which is associated with the high numbers of interfaces at grain boundaries.…”