Material standards, designations and alloys

The Effects of Variable Stirring Speeds On The Mechanical Properties of Cast Aluminum Alloys

“…Hence, the resulting change in matrix strength and microhardness of the Al-Cu alloys produced (see Figure 5) is believed to be partly due to the addition of soluble Cu element which may have distorted the atomic lattice of the material to restrain dislocation movement -and causing changes to the tensile strength and hardness of the alloys produced; as similarly discussed in a previous publication [13]. This effect is considered to have taken place in the region below 10 wt% Cu (see Figure 3); since the solubility limit of Cu atoms in Al solvent have been shown to be 5.8 wt% Cu at 550 o C [26]. Within the Al lattice, the Cu atoms act as a barrier to dislocation movement and makes plastic deformation along the stress elds di cult.…”

“…However, supersaturation occurs when the available solute concentration is higher than the acceptable solubility limit which results in the precipitation of excess solute particles from the solution and may form separate precipitate phases (Figure 4d). The solubility limit of Cu solute in Al solvent at 550 o C has been shown to be 5.8 wt% Cu [26]. Hence, any excess Cu atoms which may have possibly dissolved at higher temperature could be precipitated on cooling, creating ne, closely packed precipitates that retard dislocation motion to improve hardness and alter the tensile strength.…”

Development and Analysis of a New Joining Method for Polymer-Metal Hybrid Structures

“…Copper is added to increase strength, to support precipitation hardening, and to improve ductility and welding ability. Magnesium increases the strength by means of solid-solution strengthening and improves work-hardening ability [21]. This alloy is also characterized by poor corrosion resistance, very low extrusion ability and poor welding ability by fusion techniques [22].…”

“…This alloy is also characterized by poor corrosion resistance, very low extrusion ability and poor welding ability by fusion techniques [22]. It is one of the most important aeronautical alloys, nowadays; being used by aircraft producers such as Embraer, Eclipse, and Bombardier [21]. Additionally, it is used on gears and shafts, hydraulic valve bodies, missile parts, pistons, and fastening devices.…”

Two-Scale Computational Analysis of Deformation and Fracture in an Al-Si Composite Material Fabricated by Electron Beam Wire-Feed Additive Manufacturing

“…Aluminum alloys are lightweight structural materials extensively applied in automotive engineering, the aerospace industry, electronic communication and railway transportation due to their high strength-to-weight ratio [10][11][12][13]. Aluminum-silicon alloys, or silumines, belong to the class of casting alloys [14]. It is well known that Al-Si alloys possess high thermal conductivity and corrosion-and wear resistance, due to their active use in the aerospace, automotive and other industries [15].…”