The role of ECAP in densification behaviour of PM aluminium alloy

• Autorzy: Bidulska, J. , Kocisko, R. , Kovacova, A. , Dutkiewicz, J.

Warianty tytułu

PL

Rola procesu ECAP w zagęszczaniu proszków ze stopów aluminium

• Języki publikacji: EN

Abstrakty

EN

The present paper focused on the role of ECAP process on the densification behaviour of PM aluminium alloys. An aluminium powder Al-Mg- Si-Cu-Fe was used as material to be investigated. After applying different compacting pressures in the range of 400 to 700 MPa, specimens were dewaxed at 400°C for 60 min. Sintering was carried out in a vacuum furnace at 610°C for 30 min. The specimens were ECAPed for 1 pass. Structural characterization was carried out on the minimum of 10 different image fields for pressed and sintered specimens as well ECAPed specimens. A decrease of porosity was revealed for all specimens.

PL

Praca dotyczy zastosowania technologii przeciskania przez kanał kątowy ECAP dla zagęszczania proszków stopów aluminium. Badano proszek stopu aluminium Al-Mg-Si-Cu-Fe. Po zastosowaniu prasowania przy różnych ciśnieniach od 400÷700 MPa, próbki oczyszczano z substancji organicznych przez wyżarzanie w 400°C przez 60 min. Następnie próbki spiekano w temperaturze 610°C przez 30 min. Następnie poddano je przeciskaniu w kanale ECAP. Porównano struktury próbek spiekanych i przeciskanych w kilku miejscach i stwierdzono znaczny spadek porowatości.

Słowa kluczowe

PL

ECAP; stopy aluminium; zagęszczanie proszków

EN

ECAP; aluminium alloys; powder densification

• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2011
• Tom: Vol. 32, nr 2
• Strony: 82-85
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Bidulska, J.

autor

Kocisko, R.

autor

Kovacova, A.

autor

Dutkiewicz, J.

• Department of Metals Forming, Faculty of Metallurgy, TU of Kosice,

Bibliografia

• [1] Torres E., Ugues D., Brytan Z., Perucca M.: Development of multilayer coatings for forming dies and tools of aluminium alloy from liquid state. Journal of Physics D 42 (2009) 105306.
• [2] Bidulský R., Actis Grande M.: Wear resistance of Fe(Cr-Mo)-[0-2% Cu]- -0.65% C sintered steels. High Temperature Materials and Processes 27 (2008) 249÷256.
• [3] Bidulský R., Actis Grande M.: Wear of TiCN coated sintered Fe-1.5 Cr- -0.2 Mo-0.7 C steels. Key Engineering Materials 409 (2009) 390÷393.
• [4] Hryha E. et al.: An application of universal hardness test to metal powder particles. Journal of Materials Processing Technology 209 (2009) 2377÷2385.
• [5] Bidulský R., Actis Grande M., Kabátová M., Selecká M.: The effect of carbon coating and carbon admixing on the compressibility of Astaloy CrL. Acta Metallurgica Slovaca 14 (2008) 349÷355.
• [6] Bidulský R., Kabátová M., Selecká M., Georgiev J., Actis Grande M.: Effect of coating on compaction behaviour of Fe-Cr-Mo-C powders. Powder Metallurgy Progress 9 (2009) 27÷33.
• [7] Mihaliková M.: Research of strain distribution and strain rate change in the fracture surroundings by the videoextensometric methode. Metalurgija 49 (2010) 161÷164.
• [8] Valíček J. et al.: Experimental analysis of irregularities of metallic surfaces generated by abrasive waterjet. International Journal of Machine Tools and Manufacture 47 (2007) 1786÷1790.
• [9] Bidulský R., Rodziňák D., Guzanová A., Brezinová J.: Effect of shot peening on fatigue failure resistance of sintered steels. Acta Metallurgica Slovaca 12 (2006) 54÷58.
• [10] Tiža J., Kvačkaj T., Lupták M.: The measurement and the interpretation of the force parameters during ECAP process. Acta Metallurgica Slovaca 15 (2009) 241÷247.
• [11] Besterci M., Kvačkaj T., Kováč L., Sulleiová K.: Nanostrutures and mechanical properties developed in copper by SPD. Kovove Materialy 44 (2006) 101÷106.
• [12] Valiev R. Z., Islamgaliev R. K., Alexandrov I. V.: Bulk nanostructured materials from severe plastic deformation. Progress in Materials Science 45 (2000) 103÷189.
• [13] Langdon T. G.: The principles of grain refinement in equal-channel angular pressing. Materials Science and Engineering A 462 (2007) 3÷11.
• [14] Oh S. J., Kang S. B.: Analysis of the billet deformation during equal channel angular pressing. Materials Science and Engineering A343 (2003) 107÷115.
• [15] Lapovok R. Y.: The role of back-pressure in equal channel angular extrusion. Journal of Materials Science 40 (2005) 341÷346.
• [16] Bidulský R., Bidulská J., Actis Grande M.: Effect of high-temperature sintering and severe plastic deformation on the porosity distribution. High Temperature Materials and Processes 28 (2009) 337÷342.
• [17] Bidulská J., Kočiško R., Bidulský R., Actis Grande M., Donič T., Martikán M.: Effect of severe plastic deformation on the porosity characteristics of Al-Zn-Mg-Cu PM alloy. Acta Metallurgica Slovaca 16 (2010) 4÷11.
• [18] Bidulská J., Kvačkaj T., Kočiško R., Bidulský R., Actis Grande M., Donič T., Martikán M.: Influence of ECAP-back pressure on the porosity distribution. Acta Physica Polonica A 117 (2010) 864÷868.
• [19] Fuentes-Pacheco L., Campos M.: Bonding evolution with sintering temperature in low alloyed steels with chromium. Science of Sintering 41 (2009) 161÷173.
• [20] Lumley R. N., Schaffer G. B.: The effect of additive particle size on the mechanical properties of sintered aluminium-copper alloys. Scripta Materialia 39 (1998) 1089÷1094.
• [21] Martín J. M. et al.: Dimensional changes and secondary porosity in liquid phase sintered Al alloys. Euro PM 2004, Wien, Vol. 4 (2004) 46÷53.
• [22] Danninger H.: Secondary porosity in sintered steels and its effects on product quality and consistency. Powder Metallurgy 30 (1987) 103÷109.
• [23] Martín J. M., Castro F.: Sintering behaviour and mechanical properties of PM Al-Zn-Mg-Cu alloy containing elemental Mg additions. International Journal of Powder Metallurgy 43 (2007) 59÷69.