Aluminum-magnesium alloys useful as welding wire and mechanical support are disclosed. The aluminum-magnesium alloys exhibit improved cold wire drawing performance. Grain refiners and methods of forming the aluminum-magnesium alloys are further disclosed.

An aluminum alloy material according to an embodiment of the present invention is an aluminum alloy including a grain boundary and a plurality of grains divided by the grain boundary, and having a face-centered cubic crystal structure, and includes a band formed by employing one or more non-metallic elements selected from oxygen (O), carbon (C) and nitrogen (N) in an aluminum matrix. Each of the grains includes a plurality of sub-grains divided by a low-angle grain boundary (LAGB), and a band positioned at the low-angle grain boundary may form a coherent interface with an aluminum matrix. Since a plurality of dislocations already are present in the band, a dislocation cell size is reduced during plastic deformation, which greatly contributes to an improvement in elongation. Such an aluminum alloy material can be subjected to cold rolling at a high reduction rate, and as a result, a plate having significantly improved elongation can be obtained.

The disclosed subject-matter relates to the field of metallurgy, in particular to aluminum-based alloys, and can be used to manufacture thin-walled complex-shaped castings by casting in a metal mold, in particular for automotive components, parts of electronic devices, etc. The aluminum-based casting alloy comprises by wt. %: calcium 1.5-5.1; iron up to 0.7; silicon up to 1.0; zinc 0.1-1.8 and, optionally, one or more of manganese 0.2-2.5; titanium 0.005-0.1; zirconium 0.05-0.14; chrome 0.05-0.15, with calcium and zinc present in the alloy structure primarily as eutectic particles. The technical result is to provide a combination of process properties in casting and corrosion resistance.

A method for producing aluminum alloy materials suitable for use in the food industry includes processing of a liquid metal mixture having strontium in addition to aluminum by a twin roll continuous casting technique.

A preparation method of a high-strength and high-toughness A356.2 metal matrix composites for a hub is provided, including the following preparation process steps: preparation of a (graphene+HfB.sub.2)-aluminum master alloy wire; A356.2 alloy melting, master alloy addition, refining, and pressure casting; solution and aging treatment; shot blasting, finishing, alkaline/acid cleaning, anodic oxidation, and finished product packaging. In this way, two systems of two-dimensional nano-structure graphene nucleation and in-situ self-nucleation are introduced to complement each other, a second phase of silicon in A356.2 is refined by multi-dimensional scaling, and multi-dimensional nano-phases strengthen the aluminum-based composite material simultaneously. The preparation method solves the problems of limiting the strength, hardness, plasticity and toughness during the application of common A356.2 alloys for a hub, and a graphene/HfB.sub.2/aluminum composite material produced by a low-pressure casting process has an excellent comprehensive performance, so as to achieve a further weight reduction requirement for light weight.

An aluminum alloy and applications thereof are disclosed. Based on the total weight of the aluminum alloy, the aluminum alloy includes: 8-11% of Si, 2-4% of Cu, 0.6-4% of Zn, 0.65-1.1% of Mn, 0.35-0.65% of Mg, 0.001-0.05% of Cr, 0.01-0.03% of Sr, 0.08-0.12% of Ti, 0.008-0.02% of B, 0.1-0.3% of Fe, 0.01-0.02% of Ga, 0.008-0.015% of Sn, and the balance of Al and less than 0.1% of other elements.

An alloy composition is provided. The alloy composition includes from about 0.5 wt. % to about 1.5 wt. % silicon (Si), from about 0.5 wt. % to about 1.5 wt. % magnesium (Mg), from about 0.1 wt. % to about 0.2 wt. % zirconium (Zr), from about 0.2 wt. % to about 0.4 wt. % iron (Fe), from 0 wt. % to about 0.3 wt. % chromium (Cr), from 0 wt. % to about 0.3 wt. % manganese (Mn), from about 0 wt. % to about 1 wt. % copper (Cu), from about 0 wt. % to about 0.2 wt. % titanium (Ti), from about 0 wt. % to about 1 wt. % vanadium (V), and a balance of aluminum (Al). Greater than or equal to about 60% of the alloy composition is derived from Al scrap. Methods of forming the alloy composition and methods of forming an extruded article from the composition are also provided.

Production of a bulk Al-RE alloy body (product) using cast billets/ingots (cooling rates <100 C/s) or rapidly solidified Al-RE particulates (cooling rates 10.sup.2-10.sup.6° C./second) that have beneficial microstructural refinements that are further refined by subsequent consolidation to produce a consolidated bulk alloy product having excellent mechanical properties over a wide temperature range such as up to and above 230° C.

Disclosed are a BCC dual phase refractory superalloy with high phase stability and a manufacturing method therefor, the alloy comprising one or more of Ti, Zr, and Hf as Group 4 transition metals, one or more of Na and Ta as Group 5 transition metals, and Al, and having a structure of a BCC phase, wherein the BCC phase is composed of a disordered BCC phase and an ordered BCC phase, and wherein the ordered BCC phase is formed by allowing Al, which is a BCC phase forming element, to be soluted in an area of the BCC phase where the contents of the Group 5 transition metals are more than those of the Group 4 transition metals, so that the present disclosure provides a BCC dual phase refractory superalloy with high phase stability, characterized in that when a BCC dual phase with the ordered BCC phase and the disordered BCC phase separated from each other is formed by aging, the aging condition is precisely controlled through the apex temperature (T.sub.c) of the BCC phase miscibility gap, expressed by (Equation 1) below.
T.sub.c(K)=881.4+331.7*x+546.7*y+893.0*x*z (provided that, 0≤x≤1, 0≤y≤0.2, 0≤x+y≤1, and 0≤z≤1)  (Equation 1)

Disclosed are a BCC dual phase refractory superalloy with high phase stability and a manufacturing method therefor, the alloy comprising one or more of Ti, Zr, and Hf as Group 4 transition metals, one or more of Na and Ta as Group 5 transition metals, and Al, and having a structure of a BCC phase, wherein the BCC phase is composed of a disordered BCC phase and an ordered BCC phase, and wherein the ordered BCC phase is formed by allowing Al, which is a BCC phase forming element, to be soluted in an area of the BCC phase where the contents of the Group 5 transition metals are more than those of the Group 4 transition metals, so that the present disclosure provides a BCC dual phase refractory superalloy with high phase stability, characterized in that when a BCC dual phase with the ordered BCC phase and the disordered BCC phase separated from each other is formed by aging, the aging condition is precisely controlled through the apex temperature (T.sub.c) of the BCC phase miscibility gap, expressed by (Equation 1) below.

T.sub.c(K)=881.4+331.7*x+546.7*y+893.0*x*z  (Equation 1)

(provided that, 0≤x≤1, 0≤y≤0.2, 0≤x+y≤1, and 0≤z≤1)