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The Cerium was added to produce Al-11Si-Cu-Mg-1.5Ce alloys.
With the development of modern industry and new casting technique, an increasing demand for aluminum cast alloys has emerged, of which Al-Si alloys account for 85% – 90% [1].
This paper aims to investigate the effect of Cerium addition on the microstructure of ADC12 cast alloy in different cooling rate.
The chemical compositions of this alloys is shown in Table 1.
Li, Journal of Alloys and Compounds, (2013).

And subsequent treatment can furtherly enhance mechanical properties to satisfy the needs of structural materials. 6061 alloy is one of deformation aluminum alloys, which contains magnesium and silicon as major addition elements and can be strengthened through heat treatment [3-4].
The actual chemical elements and their contents of the alloys are Mg : 0.9; Si: 0.6; Cu: 0.3; Mn: 0.15; Fe: 0.7; Cr: 0.05; Zn:0.25 and Al: bal.
To determine the mechanical properties of the examined alloys, the hardness was tested and Rochwell hardness (HRB) measurements were performed on the samples after different solution treatment.
The aim of solution treatment is to obtain high intensity supersaturated solid solution, which is a good basis for ageing treatment.
(in Chinese) [2] Grażyna Mròwka-Nowotnik, Jan Sieniawski: Journal of Materials Processing Technology Vol.162-163(2005): 367-372

Recently, metallic powders, including pure iron, stainless steel, tool steel, titanium alloys, cobalt-chromium alloys, super-alloys based on nickel, copper and aluminum alloys, etc. have been used in additive technologies [4].
The X-ray diffraction failed to identify phases of intermetallic compounds, probably, because of their small volume fractions in samples.
In these samples of the alloy separate inclusions of chromium and molybdenum particles were detected, as well their cobalt and cobalt-free compounds.
Alloys Compd, 2015, 631, pp. 153-164
Alloys Compd., 2018, 750, 878–886

Key words: SnAgCuRE, Solder alloy, Microstructure, Property Introduction In recent years, the pollution of environment from lead (Pb) and Pb-containing compounds in microelectronic devices attracts more and more attentions in academia and industry, the lead-free solder alloys begin to replace the lead-based solders in packaging process of some devices and components.
Accrording to referrence[2] ,this is because solder alloy doesn't come into being RE compound when RE addition belows 0.1%.
Conclusion (1) Solder alloy Sn2.5Ag0.7CuRE properties and structure is closely related with RE compound.
Journal of the China Rare Earth Society(2005)04:22-24 [3] Li,B.Shi,YW.Xia,ZD.
Effect of Rare Earths additionfor SnAgCu Solder Alloys,[J]Electronics Process Technology(2004)25:193－198

a b c Fig. 1 : (a) OM – β-grains and intermetallic compounds at grain boudaries (b) OM – Widmanstätten α-plates (c) TEM : two different colonnies of α-plates.
In addition, cracks develop in primary β/β grain boundaries (Fig. 5b), where the intermetallic compounds and pores are numerous , β being also the more fragile phase.
Microscopic investigations enable us to understand fatigue mechanisms; they also emphasize the complexity of these die-cast alloys.
Ghonem, Microstructure and fatigue crack growth mechanisms in high temperature titanium alloys.
Journal of Materials Processing Technology

The results show that the surface of the obtained pure aluminum coatings is acicular, while blocks Al-Mn compounds phase exists in Al-Mn alloys layer, and the Al-Mn alloy layer is composed of Al, FeAl3, Fe2Al5 and MnAl6 phases.
Owing to the non-ferrous metals and their alloys possess a number of special performances that steel material does not have.
The present work aims to form an anti-abrasive surface on Q235 steel by hot-dip.
The surface of the obtained pure aluminum coatings is acicular, while blocks Al-Mn compounds phase exists in Al-Mn alloys layer, and the Al-Mn alloy layer is composed of Al, FeAl3, Fe2Al5 and MnAl6 phases.
Voss: Journal of Nuclear Materials, Vol.249 (1997), p.39

New material compounds are suitable for new application areas.
Conclusion Due to the conflict between the requirements (low weight and high strength), the design of components from a thin sheet of metal manufactured of different compounds, still poses optimisation problems.
Riemelmoser: A Study of the fatigue behaviour of an aluminium-clad steel material compound, submitted to Strain Journal 2007
Karimi Taheri: bond strength and formability of an aluminium-clad steel sheet, Journal of Alloys and Compounds 361, 2003, 138-143
Riemelmoser: A concept for the fatigue life prediction of components from an aluminium-steel compound, seventh international ASTM/ESIS, Tampa 2007, submitted to journal of ASTM International

However, joining aluminum to steel is challenging because of the formation of intermetallic compounds (IMCs) at the interface, which can degrade the joint strength and performance.
The macrograph in Fig. 4 indicates that the two different alloys did not mix in the molten state.
The interaction of IMC with the composition of participating alloys should also be verified.
"Effect of intermetallic compounds on the mechanical property and corrosion behaviour of aluminium alloy/steel hybrid fusion-brazed welded structure." 
Journal of Alloys and Compounds 783 (2019): 753-764

High-energy ball milling are widely used for producing the iron- and nickel-based super alloys for high-temperature structural applications [7].
Schuber: Tungsten-Properties, Chemistry, Technology of the Element, Alloys and Chemical Compounds.
Taimatsub: Journal of the European Ceramic Society (2003), p. 871
Phasha: International Journal of Refractory Metals and Hard Materials Vol. 28 (2010), 211
Nolze: Journal of Applied Crystallography Vol. 29 (1996), p. 301

The use of friction welding with mixing allows to obtain non-defectal compounds of both alloy AL25 and dispersed particles composite aluminum materials.
The aim of this work is to study the mechanical properties and structure of the compounds of dispersed aluminum-strength composite materials, made by welding friction with mixing/ Materials and Researchtechniques Some composite materials based on aluminum alloys with dispersed reinforcement ceramic particles of aluminium oxide Al2O3 or silicon carbide SiC (Table 1) were used for the research.
Summary In conclusion, thanks to the formation of seams in a solid phase, the FSW process allows to obtain quality non-inseparable compounds of composite aluminum alloys without changing their phase-structural condition.
Wang, The effect of interface defect on mechanical properties and its formation mechanism in friction stir lap welded joints of aluminum alloys, Journal of Materials Processing Technology, Vol. 238 (2016) 244–254
Metalloographic etching of metals and alloys. – M. : Metallurgy, 1986