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Alloys based on the Al–Zn–Mg–Cu system possess the highest strength properties among commercial aluminum alloys [1–2].
The present work was aimed at substantiating the principles for optimizing the phase constitution of a novel group of aluminum alloys, i.e., sparingly alloyed high-strength casting alloys (<1%Ni, >0.4% Fe and 0.1-0.3%Cu) based on the (Al)+Al9FeNi eutectic.
Nickel and iron may enter five compounds some of which are characterized by a wide range of homogeneity.
Specifically, the section at 1% Ni shows that we should expect the appearance of primary intermetallic compounds starting from about 0.8% Fe (Fig. 2b).
This means that the introduction of Ni and Fe to alloys of AA7055 type does not give the same effect as in low-copper alloys.

When the spray touches the heated substrate, it decomposes and forms many chemical compounds.
Belgacem: Journal of Alloys and Compounds Vol. 610 (2014), p. 250
Kim: Journal of Alloys and Compounds Vol. 682 (2016), p. 232
Yu: Journal of Alloys and Compounds Vol. 684 (2016), p. 428
Loulidi: Journal of Alloys and Compounds Vol. 671 (2016), p. 560

Baker (editors) ASM Specialty Handbook: Magnesium and Magnesium Alloys, ASM International, Materials Park, Ohio, UA, 1999 4.
Petraroli, Journal of Alloys and Compounds, Vol. 461, (2008), pp. 154–159. 5.
Gupta, Journal of Alloy and Composites, Vol. 509 (2011) pp. 7572-7578. 8.
Zheng, Journal of Alloys and Compounds, Vol. 504 (2010), pp. 542-547. 12.
Lim, Journal of Alloys and Compounds, Vol. 260 (1997), pp. 250-255. 27.

The alloying element dissolved in the matrix precipitates in fine particles by aging treatment, resulting in a higher strength of 1948MPa.
Aging treatment is usually adopted to investigate the microstructural evolution and mechanical properties by microstructural observations, microhardness tests, and tensile tests [9].Aging treatment is aimed at separating out the precipitation hardening alloying element dissolved in base metal with extreme particle, which is the particle of alloying elements or the particle of intermetallic compounds.
Aging treatment is aimed at separating out the precipitation hardening alloying element dissolved in base metal with extreme particle, which is the particle of alloying elements or the particle of intermetallic compounds.
By aging treatment the super-saturated alloying elements in the steel precipitated to strengthen the steel.
Dong, et al., Strengthening effect of Cu-rich phase precipitation in 18Cr9Ni3CuNbN austenitic heatresisting steel, Acta Metallurgica Sinica 2011.2, 24:141–147 [9] Dong Peng, Jun Shen, Qin Tang, Cuiping Wu, Yanbing Zhou, Effects of aging treatment and heat input on the microstructures and mechanical properties of TIG-welded 6061-T6 alloy joints, International Journal of Minerals, Metallurgy andMaterials,2013.3, 20 (20) 259 [10] Wenhua Zhang, Stain Steel and Heat Treatment (2010), Shenyang Press of Liaoning Science and Technology, 2010.2

J.A.C.de Paiva et al.: Journal of Alloys and Compounds Vol. 485 (1-2) (2009), p. 637
Khadar: Journal of Applied Physics Vol. 107 (2010), p. 114310
Kingery: Journal of Applied Physics Vol. 38 (9) (1967), p. 3589
J.A.C.D Paiva et al.: Journal of Alloys and Compounds Vol. 485 (2009), p. 637
Nadeem, et al.: Journal of Alloys and Compounds Vol. 493(1-2) (2010), p. 385.

Therefore, it is urgent need to solve problem for Ni3Al alloys welding in industrial applications.
This study aims to solve the solidification crack of Ni3Al base alloy casting with the method of laser welding.
References [1] Yonggang Zhang, Yafang Han, Guoliang Chen: Structure Material of The Metal Compounds, defense industry publishing, p. 546-631,(2001) {In Chinese} [2] Huaxin Li, R.H.Jones, Effect of pre-welding heat treatments on welding a two-phase Ni3Al alloy, Materials Science and Engineering A192/193(1995)563-569 [3] C.T.Liu, J.Stringer, J.N.Mundy, L.L.Horton, P.Angelini, Ordered intermetallic alloys: an assessment, Intermetallics 5(1997)579-596 [4] Hili Luo, Wujun Ye, Di Feng: Art Of Structure Weld Research For Intermetallic Ni3Al Alloy, edited by The high technology communication, 30-40, (1999) {In Chinese} [5] Yunrong Zheng: Hf For Crack Effect On Casting Ni-based High-temperature Alloy Welding, submitted to Welding Journal, p. 161-170,(1988) {In Chinese} [6] Huaxin Li and Y.K.Chaki, in VA.
Whittenberger and M.H.Yoo (eds), High-Temperature Ordered Intermetallic Alloys V.
Technol, p. 10-26 (1994), [9] Yunrong Zheng, Yulin Cai, Zhongci Ruan: Hf and Zr Mechanism Research In High Temperature Materials, submitted to The Journal of Aviation Materials, volume 6 of Progress, p. 25-34 (2006) {In Chinese} [10] Zhiyong Mao: Electron Beam Welding Research of Ni3Al Intermetallic Compounds, In Journal of electron beam processing technology supplement, p. 34-37 (1999) {In Chinese}

In this scenario, aluminium alloys are an interesting alternative to conventional ferrous alloys, since they can combine low density and good mechanical properties at the same time.
One of the solutions to overcome this problem is to take advantage from the capability of heat treatable aluminium alloys, in particular the Al-Mg-Si alloys, in hardening/softening if treated in different conditions.
The aim of the present work is to correlate the effect of the aging phenomenon on the mechanical properties of the AC170PX alloy to a specific temperature gradient profile on the specimen.
Fu, Structural-gradient-materials produced by gradient temperature heat treatment for dual-property turbine disc, Journal of Alloys and Compounds 557 (2013) 27-33 [10] J.
Hamamda, Precipitation kinetics of the hardening phase in two 6061 aluminium alloys, Materials Letters 64 (2010) 353–356

In contrast to vacuum brazing, only the joining zone is heated up to the brazing temperature so that the compound stresses are minimized.
The present work aims at brazing of ceramic and metal using CO2 gas laser by placing alumina ceramic and a titanium alloy in a sample holder and inserting the braze foil in between them.
From the XRD pattern, it is confirmed that a reaction layer is formed between the Ti6Al4V and KM72 interface containing Ti-Cu compounds.
No other compounds with Ag-Cu eutectic structure is observed.
MatteoGalli et al “Characterization of the Residual Stress and Strength of Ceramic-Metal Braze Joints” Journal of Engineering Material and Technology, 131 (2009) pp. 021004-1

The amorphous alloys are difficult to weld by conventional melting processes, even in the presence of inert gas.
Introduction Amorphous metal alloys are relatively recent materials, produced since 1960 as micrometer-thick ribbons by rapid cooling on a rotating cylinder.
The most common method for obtaining amorphous alloys in ribbon form with larger widths is the Planar Flow Casting method.
The addition of Si and B aimed to increase the glass forming ability of the alloy and improve the thermal stability of the amorphous phase [5].
Journal of Alloys and Compounds 413, (2006), pp.118–121 [3] W.D.Liu, K.X.Liu, Q.Y.Chen, J.T.Wang, H.H.Yan, X.J.Li: Metallic glass coating on metals plate by adjusted explosive welding technique.

Abstract The aim of this study was to investigate the influence of thermo-cyclic treatments on the mechanical characteristics (Hardness and Resilience) of low-alloy 42CD4 steel.
Materials and Methods Materials The material used in this study was a low alloy steel, 42CD4 (AFNOR Standard), comprising essentially 1.025 % of chromium (Cr), 0.229 of molybdenum (Mo) and other elements of alloys such as copper (Cu), Nickel (Ni) ... etc.
Wang, Jinping Suo, Effects of alloying elements and heat treatment on hydrogen diffusion in SCRAM steels, Journal of Nuclear Materials, 516 (2019) 135-143
Villal pando Hernandez, Effect of heat treatment condition on microstructure and superelastic properties of Ti24Zr10Nb2Sn, Journal of Alloys and Compounds, 782 (2019) 893-898
Kossman, the effect of milling time on structural, friction and wear behavior of hot isostatically pressed ti–ni alloys for orthopedic applications,TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings. 85 (2019) 865-875 https://doi.org/10.1007/978-3-030-05861-6_85.