Tytuł artykułu
Autorzy
Wybrane pełne teksty z tego czasopisma
Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
The paper presents the discussion of the results of mechanical testing for aluminium foundry alloy AlSi5Cu1Mg for high-loaded machine elements. Values of yield strength (Rp0.2), tensile strength (Rm), elongation(A5) and hardness (HB) are usually considered as the primary quality assessment criterion for a manufacturing process. It was concluded, that this criterion, A5 index particularly, is unsatisfactory to estimate the plasticity of the alloy and its crack resistance in the presence of sharp-pointed stress concentrators or microcracks. More adequate parameter is plane strain fracture toughness K_Ic. However, size of the samples appeared to be twice as large as would be needed to fulfill requirements of test conditions, and the test itself is laborious and time-consuming that it becomes impractical as a acceptance test. Therefore, substitute test for quality assessment - determination of tensile strength in the presence of a sharp notch kmR was applied. The comparative analysis of kmR/Rp0.2 ratio, as a more enhanced fatigue resistance criterion than kmR and plane strain fracture toughness K_Ic of the alloy was performed. It was assumed that kmR/Rp0.2 parameter has good correlation with the critical stress intensity factor K_Ic Thus, under manufacturing process conditions, being unable to carry out K_Ic test, it may be successfully replaced by kmR test.
Czasopismo
Rocznik
Tom
Strony
217--222
Opis fizyczny
Bibliogr. 20 poz., rys., tab.
Twórcy
Bibliografia
- [1] I.J. Polmear, Light alloys. Metallurgy of the light metals. Arnold, London-New York-Sydney-Auckland 1995.
- [2] Aluminium and aluminium alloys, ASM Speciality Handbook, de. by J.R. Davis, 1993.
- [3] A.K. Vasudevan, R.D. Doherty, S. Suresh, Aluminium alloys: Contemporary research and applications: Treatise on materials science and technology. A.K. Vasudevan and R.D. Doherty, eds., Academic Press, Inc., London 1989.
- [4] S. Poniewierski, Struktura a właściwości użytkowe siluminów, Inżynieria Materiałowa, vol. 5 (1991) 103.
- [5] T. Yen-Hung, L.Sheng-Long, L. Yu-Lom, Effect of Be and Fe on the microstructure and mechanical Properties of A357.0 Alloys, Metall. and Mater. Trans., vol. 26A (1995) 1195.
- [6] G. Mrówka-Nowotnik, J. Sieniawski, M. Wierzbińska, Analysis of intermetallic particles in AlSi1MgMn aluminium alloy, Journ. of Achiev. in Mater. and Man. Eng., vol. 20 No 1-2 (2007) 155.
- [7] C.H. Caceres, C.J. Davidson, J.R. Griffiths,The deformation and fracture behaviour of Al-Si-Mg casting alloy, Mater. Sci. and Eng., vol. A197 (1995) 171.
- [8] T. Yen-Hung, L. Sheng-Long, L. Yu-Lom, Effects of Be and Fe content on plane strain fracture toughness in A357 alloys, Metall. and Mater. Trans., vol. 26A (1995). 2937.
- [9] P.N. Crepeau, S.D. Antolovich, J.A. Warden, Structure - property realtionships in aluminium alloy 339-T5: Tensile behaviour at room and elevated temperature, AFS Trans., vol. 98 (1990) 813.
- [10] G.T. Hahn, The influence of microstructure on brittle fracture toughness, Metals Transaction, vol. 15A (1984) 6.
- [11] C.H. Caceres, C.J. Davidson, J.R. Griffiths, Q.G. Wang, The effect of Mg on the microstructure and mechanical behavior of Al-Si-Mg casting alloys, Metall. and Mater. Trans., vol. 30A (1999) 2611.
- [12] M. Wierzbińska, J. Sieniawski, Rola czynników geometrycznych mikrostruktury w kształtowaniu odporności na pękanie stopu AlSi5Cu1, Archiwum odlewnictwa, vol. 6 No 19 (2006) 399.
- [13] T. Kobayashi, Strength and fracture of aluminium alloys, Mater. Sci. and Eng., vol. A280 (2000) 8.
- [14] M. Wierzbińska, J Sieniawski, Effect of morphology of eutectic silicon crystals on mechanical properties and cleavage fracture toughness of AlSi5Cu1 alloy, Journ. of Achiev. in Mater. and Manuf. Eng., vol. 14 No 1-2 (2006) 31.
- [15] M. Wierzbińska, J. Sieniawski, Effect of dendrite arm spacing on cleavage fracture toughness of AlSi5Cu1 alloy, Inter. Journ. of Cast Met. Research, vol. 17 No 5 (2004) 267.
- [16] G. Mrówka-Nowotnik, J. Sieniawski, A. Nowotnik, Tensile properties and fracture toughness of heat treated 6082 alloy, Journ. of Achiev. in Mater.and Manuf. Eng., vol. 17, No 1-2 (2006) 105.
- [17] G. Mrówka-Nowotnik, J. Sieniawski, Influence of the heat treatment on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys, Journ. of Mater. Proc. Tech. vol. 162-163 (2005) 367.
- [18] M. Wierzbińska, J. Sieniawski, K. Kubiak, Nowe kryteria oceny jakości odlewniczego stopu AlSi5Cu1 stosowanego w silnie obciążonych elementach maszyn, Mechanik, vol. 7, (2000) 504.
- [19] A. Gierek, J. Piątkowski, J. Szymszal, Ocena niezawodności odlewniczych stopów Al na podstawie właściwości wytrzymałościowych, Archiwum Odlewnictwa, vol. 6 No 19 (2006) 123.
- [20] J.W. Wyrzykowski, E. Pleszakow, J. Sieniawski, Odkształcanie i pękanie metali, WNT, Warszawa 1999.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ3-0032-0041