Damage mechanism in AlSi1MgMn alloy

• Autorzy: Mrówka-Nowotnik G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main task of this work was to study the fracture mechanism in 6082 aluminium alloy. Design/methodology/approach: Microstructure and fractografic examination has been carried out on the samples in the peak aged condition after static tensile tests, crack resistance test and tensile test in the presence of sharp notch using an optical microscope - Nikon 300, scanning electron microscope HITACHI S-3400 (SEM) in a conventional back-scattered electron mode and JEOL - JEM 2100 ARP TEM/STEM electron microscope on polished sections etched in Keller solution. Findings: It has been found that, at room temperature, general cavitation (nucleaction of voids) occurs after appreciable strain. The nucleation of voids results from debonding along certain particle/matrix interfaces. Observations of microstructure revealed second fracture mechanism initiated by cracking of brittle intermetallic phases. Practical implications: All this knowledge . identification of the microstructural parameters for the different modes of void nucleation and cracking of intermetallic phases leading to fracture of the alloy . can be used to predict maximum ductility before fracture of tensile specimens. Originality/value: For deformation at room temperature different void populations have been defined: void nucleated by intermetallic particle fracture, by s particle/matrix decohesion and by �ż particle/matrix decohesion.

Słowa kluczowe

EN

fracture mechanics; electron microscopy; microstructure; intermetetallic phases

PL

mechanika powstawania pęknięć; mikroskopia elektronowa; mikrostruktura

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 29, nr 2
• Strony: 93--96
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Mrówka-Nowotnik G.

• Department of Materials Science, Rzeszow University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland,

Bibliografia

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• [2] G. Mrówka-Nowotnik, J. Sieniawski, Influence of the heat treatment on the microstructure and mechanical properties of 6005 and 6082 aluminium alloys, Proceedings of the 13th International Conference "Achievements in Mechanical & Materials Engineering" AMME’2005, Gliwice-Wisła, 2005, 447-450.
• [3] G. Mrówka-Nowotnik, J. Sieniawski, Influence of heat treatment on the micrustructure and mechanical properties of 6005 and 6082 aluminium alloys, Journal of Materials Processing Technology 162-163 (2005) 367-372.
• [4] L.A. Dobrzański, W. Borek, R. Maniara, Influence of the crystallization condition on Al-Si-Cu casting alloys structure, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 211-214.
• [5] G. Mrówka-Nowotnik, J. Sieniawski M. Wierzbińska, Analysis of intermetallic particles in AlSi1MgMn aluminium alloys, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 155-158.
• [6] G. Mrówka-Nowotnik, J. Sieniawski M. Wierzbińska, Intermetallic phase particles in 6082 aluminium alloys, Archives of Materials Science and Engineering 28/2 (2007) 69-76.
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• [13] F.J. MacMaster, K.S. Chan, S.C. Bergsma, M.E. Kassner, Aluminium alloy 6069 part II: fracture toughness of 6061- T6 and 6069-T6, Materials Science and Engineering A289 (2000) 54-59.
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• [15] J.W. Wyrzykowski, E. Pleszakow, J. Sieniawski, Deformation and Fracture of Metals, WNT, Warszawa 1999.