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AgSnBi powder consolidated by composite mode of deformation

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Języki publikacji
EN
Abstrakty
EN
Purpose: The objective of this work present the characterization of microstructure and properties of consolidated powder AgSn7.5Bi0.5 by using composition of cyclic extrusion compression (CEC) and hydrostatic extrusion (HE) methods. As the final product the wires of 3 mm in diameter were obtained. The comparison of powder properties after CEC deformation and after the combined deformation CEC and HE is presented. Design/methodology/approach: The investigated samples contained consolidated by large plastic deformations particles of AgSnBi. The samples were deformed by the CEC method in the range of true strains = 0.32 up to .= 25.2 and then additionally were extruded to . = 1.85. The systematic observations by optical microscopy were performed for determination of the quality of particle joints. The microstructure was observed by optical, scanning and transmission electron microscopy. Microhardness was measured and areas around indentations of microhardness penetrator were observed. This allows evaluated resistance of consolidated material against local cracking under the penetrator load. Findings: Microstructure of consolidated AgSnBi powder was finding at the cross sections of samples as consisting from almost equiaxial grains, which size decreasing with the increasing of plastic deformations. The microhardness of samples strongly increase in the few first cycles (to about . = 2 of CEC) and then keeps almost the same level of about žHV = 107 - 111 to the strain of about .= 25. Inside the consolidated granules subgrains/grains with the average size of about 77 nm, after the . = 25, were found. Research limitations/implications: This paper presents results for one alloy - MC MgAl3Zn1 only, cooled with three different solidifications rate i.e. 0.6, 1.2 and 2.4°C/s, for assessment for the liquidus and solidus temperatures and its influence on the mechanical properties and structure. Practical implications: The parameters described can be applied in metal casting industry for selecting magnesium ingot preheating temperature for semi solid processing to achieve requirements properties. Originality/value: The paper contributes to better understanding and recognition an influence of different solidification condition on non-equilibrium thermal parameters of magnesium alloys.
Rocznik
Strony
161--167
Opis fizyczny
Bibliogr. 17 poz., rys., tabl.
Twórcy
autor
autor
autor
autor
autor
autor
  • Faculty of Non-Ferrous Metals, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland, mrichert@agh.edu.pl
Bibliografia
  • [1] C. P. Wu, D. Q. Yi, J. Li, L. R. Xiao ,B. Wang, F. Zheng , B. Wielage, A. Wank, Investigation on microstructure and performance of Ag/ZnO contact material, Journal of Alloys and Compounds 457 (2008) 565-570.
  • [2] C. P. Wu, D. Q. Yi, C. H. Xu, J. Li, B. Wang, F. Zheng, Microstructure of internally oxidized layer in Ag-Sn-Cu Allom, Corrosion Science 50 (2008) 3508-3518.
  • [3] K. Kim Shae, Novel rotation-cylinder method for the processing of binary alloys with no range of solid solubility, Materials Science and Engineering A 449-451 (2007) 752-755.
  • [4] H. Ipser, H. Flandorfer, Ch. Luef, C. Schmetterer, U. Saeed, Thermodynamics and phase diagrams of lead-free solder, Materials, Journal of Materials Science Mater Electron 18 (2007) 3-17.
  • [5] S. Hassam, E. Dichi, B. Legendre, Experimental equilibrium phase diagram of the Ag-Bi-Sn system, Journal of Alloys and Compounds 268 (1998) 199-206.
  • [6] S. Księżarek, B. Besztak, Wires used in the production of electric contacts, Wire Journal International 40 (2000) 208-213.
  • [7] L. P. Lechman, R. K. Kinyanjui, J. Wang, Y. Xing, L. Zawalij, P. Borgesen, E. J. Cotts, Microstructure and Damage Evolution in Sn-Ag-Cu Joints, Proceedings of the Electronic Components and Technology Conference, 2005, 674-681.
  • [8] S. K. Kang, Lead, (Pb) - Free Solders for Electronic Packaging, Journal of Electronic Materials 23/8 (1994) 701-707.
  • [9] I. E. Anderson, F. G. Yost, J. F. Smith, Ch. M. Miller, R. L. Terpstra, Pb-Free Sn-Ag-Cu Ternary Eutectic Solders, United States Patent, 5,527,628, 1996.
  • [10] W. Głuchowski, Z. Rdzawski, Stabilization of mechanical properties in silver alloys by addition of lanthanides, Journal of Achievements in Materials and Manufacturing Engineering 30/2 (2008) 129-134.
  • [11] J. Śleziona, J. Wieczorek, M. Dyzia, Mechanical properties of silver matrix composites reinforced with ceramic particles, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 165-168.
  • [12] J. Wieczorek, J. Śleziona, Silver matrix composites reinforced with galvanically silvered particles, Archives of Materials Science and Engineering 28/8 (2007) 475-478.
  • [13] M. Staszewski, D. Kopyto, K. Becker, A. Wrona, J. Dworek, M. Kwarciński, The X-ray activated reduction of silver (I) solutions as a metod for nanoparticles manufacturing, Journal of Achievements in Materials and Manufacturing Engineering 28/1 (2008) 23-26.
  • [14] G. Kosec, I. Anzel, M. Bruncko, L. Kosec, Internal oxidation of Ag - alloys with Te, Se and S, Proceedings of the 13th International Scientific Conference “Achievement in Mechanical and Material Engineering” AMME’2005, Gliwice - Wisła, 2005.
  • [15] A. K. Eksi, A. H. Yuzbasioglu, Effect of sintering and pressing parameters on the densification of cold isostatically pressed Al and Fe powders, Materials and Design 28/4 (2007) 1364-1368.
  • [16] F. B. Swinkels, D. S. Wilkinson, E. Arzt, M. F. Ashby, Mechanisms of Hot-Isostatic Pressing, Acta Materialia 31/11 (1993) 1829-1840.
  • [17] I. Sulima, P. Klimczyk, P. Hyjek, The influence of the sintering conditions on the properties of the stainless steel reinforced with TiB2 ceramics, Archives of Materials Science and Engineering 39/2 (2009) 103-106.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BOS2-0022-0044
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