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Elena Valentina Stoian, Vasile Bratu, Cristiana Maria Enescu and Dan Nicolae Ungureanu

researches on the influence of chemical composition of cast rolls made of hypereutectic steel, on their hardness in exploatation, Scientific Conference Research and Development of Mechanical Elements and Systems Jahorina – IRMES, Sarajevo, Bosnia & Hertegovina, 2002. [23] Joan Serrallach, Jacques Lacaze, Jon Sertucha, Ramón Suárez, Adrián Monzón, Effect of Selected Alloying Elements on Mechanical Properties of Pearlitic Nodular Cast Irons, Key Engineering Materials Vol. 457 (2011) p. 361-366. [24] C. O. Rusănescu M. Rusănescu, F. V. Anghelina, T. Iordanescu

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B. Chokkalingam, V. Raja, J. Anburaj, R. Immanual and M. Dhineshkumar

[4] Rassizadehghani, J., Najafi, H., Emamy, M. & Saeen, E. (2007). Mechanical Properties of V, Nb and Ti Bearing As Cast Micro Alloyed Steels. Journal of Material Science and Technology. 23(6), 779- 784. [5] Kalandyk, B., Matysiak, H. & Głownia, J. (2004). Microstructure Strength Relationship in Microalloyed Cast Steels. Reviews on Advanced Material Science. 8(1),44-48. [6] Guang Xu, Xiaolong Gan, Guojun Ma, Fengluo & Hang Zoe. (2010). The Development of Ti Alloyed High Strength Micro alloy Steel. Materials and Design. 31, 2891

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A. Şelte and B. Özkal

-1065 (2013). [7] C.H. Leung, H.J. Kim, A comparison of Ag/W, Ag/WC, and Ag/Mo electrical contacts, IEEE Transactions on Components Hybrids and Manufacturing Technology 7 , 69-75 (1984). [8] A. Yamamoto, T. Kusano, T. Seki, T. Okutomi, Vaporization of carbon from Cu-WC contact during arc discharge in vacuum, International Symposium on Discharges and Electrical Insulation in Vacuum 18 , 349-352 (1998). [9] J.A. Rogers, Dispersion strengthened copper alloys with useful electrical and mechanical properties, Powder Metallurgy 20 , 212-220 (1977). [10

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M. Zygmunt-Kiper, L. Blaz and M. Sugamata

References [1] C. Suryanarayna, Mechanical alloying and milling, Progress in Materials Science 46, 1-184 (2001). [2] D.G. Ki m, J. Kaneko, M. Sugamata, Preferential oxidation of Mg in mechanically alloyed Al-Mg-Obased systems, Materials Transactions JIM 36, 305-311 (1995). [3] M. Kubota, P. Cizek, W.M. Rainfort h, Properties of mechanically milled and spark plasma sintered Al-15 at.% MgB 2 composite materials, Composites Science and Technology 68, 888-895 (2008). [4] K. Seimiya, M. Sugamata, L

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M. Hebda, S. Gadek and J. Kazior

References [1] J.S. Benjamin, Met. Trans. 1 , 2943 (1970). [2] C. Suryanarayana, Prog. Mater. Sci. 1 , 46 (2001). [3] R.C. Agarwala, V. Agarwala, J. Kar - wan - Baczewska, Development of nanograined Ti-Al.-Graphite (Ni-P) by mechanical alloying route, Archives of Metallurgy and Materials 53(1) , 57-61 (2008). [4] F.G. Caballero, H.K.D.H. Bhadeshia, K.J.A. Mawella, D.G. Jones, P. Brown, Material Science and Technology 17 , 512-516 (2002). [5] F.G. Caballero, H

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K. Yoon and J.-H. Ahn

Abstract

In this study, we examined the effect of Ga-doping and mechanical alloying in MgB2 on microstructural and phase evolution. A comparison was made between in-situ and ex-situ processed Mg-B-Ga samples. Densification was markedly improved by ex-situ sintering of ball-milled MgB2+Ga. The Ga-doping and ball-milling prior to sintering resulted in the formation of impurity phases such as MgO, Ga5Mg2 and Ga2O3. Lattice parameter of MgB2 increased with increasing ball-milling duration as well as by Ga-doping.

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Jung-Ho Ahn, Tae Kyu Kim and Jeongsuk Ahn

Abstract

In the present work, we have examined the effect of Ti on the properties of Fe-Y2O3 alloys. The result showed that the addition of Ti was effective for improving mechanical properties. This is due to the reduction of oxides by Ti during mechanical alloying and hot-consolidation. In particular, iron oxides are effectively reduced by the addition of Ti. Compared to the pristine Fe-Y2O3 alloys, titanium-added alloys exhibited fine and uniform microstructures, resulting in at least 60% higher tensile strength.

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Denisa Olekšáková, Peter Kollár and Ján Füzer

alloys prepared by warm compaction”, J. Alloys and Compd., vol. 483 (2009), pp. 557. [5] C. Suryanarayana, ”Mechanical alloying and milling”, Progress in Materials Science, vol. 46 (2001), pp. 1. [6] D. Olekšákov´a, P. Kollár, J. Füzer, M. Kus´y, S. Roth and K. Polanski, ”The influence of mechanical milling on structure and soft magnetic properties of NiFe and NiFeMo alloys”, Journal of Magnetism and Magnetic Materials, vol. 316(2007), pp. e838-e841. [7] D. Olekšákov´a, S. Roth, P. Kollár and J. Füzer, ”Soft magnetic

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S.Y. Chang, H.S. Jang, Y.H. Yoon, Y.H. Kim, J.Y. Kim, Y.K. Lee and W.H. Lee

REFERENCES [1] K. Kasraee, A. Tayebifard, E. Salahi, J. Mater. Eng. Perfom. 22 , 3742 (2013). [2] S. Sabooni, F. Karimzadeh, M.H. Abbasi, Bull. Mater. Sci. 35 , 439 (2012). [3] J.J. Shon, Metals Mater. 3 , 199 (1997). [4] A.K. Vasudevan, J.J. Petrovic, Mater. Sci. Eng. A 155 , 1 (1992). [5] N. Forouzanmelu, F. Karimzadeh, H. Enayati, J. Alloys Comp. 471 , 93 (2009). [6] A. Couret, G. Molenat, J. Galy, M. Thomas, Intermetallics 16 , 1134 (2008). [7] P. Bhattacharya, P. Bellon, R.S. Averback, S.J. Hales, J. Alloys

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D. Wójcik-Grzybek, K. Frydman and P. Borkowski

/Ag contact materials with different homogenity; Structure Magazine 40, Struers 6-8. [18] J.S. Benjamin, T.E. Voli n, The mechanism of mechanical alloying, Metallurgical Transactions A 5A, 1929-1943 (1974). [19] C. Suryanarayana, Mechanical alloying and milling; Progress In Materials Science 46, 1-184 (2001). [20] D.L. Zhang, Processing of advanced materials using high-energy mechanical milling; Progress In Materials Science 49, 537-560 (2004). [21] A. Gładki, D. Wójcik - Grzybe k, K. Fryd -ma n, Badania