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Preparation, Structure, and Properties of Ni3Al and NiAl Light Powder Alloys for Aerospace Povarova K.B.1, Skachkov O.A.2 1 Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia 2 Bardin Scientific-Technical Centre of Materials and Technology, Russian Federation. 2-ay Baumanskaya, 9/23 , Moscow, 107005, Russia a povarova@ultra.imet.ac.ru, b mitpor@online.ru Keywords: nickel aluminides, oxide particles, powder metallurgy, microstructure, deformation, heat treatment, mechanical properties, complex articles, gas-turbine engines Abstract: New light super-heat-resistant powder Ni3Al and NiAl-based alloys (of the Ni-Al-Mo-B, Ni-Al-Fe-La, and Ni-Al-Y2O3 systems), as well as a new technology for preparing and processing them have been developed.
The sintered alloys containing (wt %) 0.1% La or 5% Fe + 0.1 % La were characterized by UTS = 250, 54, 25 and 12 MPa (EL = 0.8, 18, 12 and 9%) at 600, 1100, 1300 and 1500°C, respectively.
References [1] Kablov E.I., Buntushkin V.P., Povarova K.B., et al., Low-alloy light high-temperature materials based on Ni3Al intermetallic compound, Metally, 1999, no. 1. pp. 58-65
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Al Abri, Ehab F.
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The finding is supported by the studies of Liang et.al. and Block et.al. [22, 27].
[8] A.L.
El-Ashtoukhy, N.
El-Desoky, M.M.
El-Sheikh and N.M.

(a), or given TMP from preheat of 1260°C consisting of compressions ε = 0.35 at 1100°C, 1000°C, 900°C with air cooling (CVN 29J, σy 681MPa, 18% el.), (b) or fan cooled (CVN 29J, 714MPa, 16% el.)
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Hashish [4] and Paul et al [5]).
Zeng and Kim [13], and El-Domiaty et al [14, 15]).
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El-Domiaty, M.A.
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In other applications, Zn-Mg alloys have been developed for use as protective metallic coatings on steels by Prosek et al. [3] and Yao et al. [4].
The results agree well with those reported by Prosek et al. [3] and Yao et al. [4].
The interlamellar spacing in the eutectic structure in the present study was about 0.60 mm, consistent with that reported by Yao et al. [4].
El-Sayed, H.S.
Abd El-Lateef, Effect of minor nickel alloying with zinc on the electrochemical and corrosion behavior of zinc in alkaline solution, J.

Belotskii et al. [15] observed a finite region of In2Se3 based solid solution.
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Singh and A.T. et al, Preparation and characterization of SnSe Nano crystalline thin films, Journal of Optoelectronics and Advanced Materials. 7(4) (2005) 2085–2096

El - Taweel and Hewidy assessed the validity of two circular planetary EDM modes viz.
Similarly Egashira et al. demonstrated planetary motion of the rotating tool electrode for improved process efficiency [4].
Teicher et al. employed tool movement along a helix path for accurate electro discharge drilling of carbon fibre-reinforced plastics [5].
Similar observation has been reported by Dave et al. in their work [8].
El-Taweel, M.

We have got the UFG billets of Al-Mg alloy.
Structure formed in the Al-Mg alloy processed with TE Table 1 Mechanical properties of Al-4.45Mg-0.4Mn-0.3Sc-0.1Zr alloy Al-4.45Mg-0.4Mn-0.3Sc-0.1Zr YS, [MPa] UTS, [MPa] El, [%] s-1, [MPa] Initial 290 400 15 180 4 pass TE 350 420 10 330 The second promising material for TE commercialization, based on the grain refinement effect, is commercially pure (CP) titanium for medical application.
Structure of CP titanium after four TE passes Table 2 Mechanical properties of CP titanium Ti YS, [MPa] UTS, [MPa] El, [%] Initial 350 430 20 4 pass TE + Rol. 70% 800 840 15 The processed UFG titanium has been used for production of implants for use in traumatology and orthopedics (see Fig. 9).
Zhu et al. / The Minerals, Metals, and Materials Society,Warrendale, PA (2002) p. 297.

Liu and et al. [3] used the genetic algorithm (GA) to directly determine lay-ups with rough increment angles.
The EL and ET are moduli of longitudinal elasticity in the L and T directions, respectively, GLT is a shear modulus and νLT, νTL are the Poisson ratios.
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