The effect of high-pressure plastic forming on the structure and strength of AA5083 and AA5754 alloys intended for fasteners

• Autorzy: Kulczyk M. , Skiba J. , Pachla W. , Smalc-Koziorowska J. , Przybysz S. , Przybysz M.

Identyfikatory

DOI

10.24425/bpasts.2020.134183

• Języki publikacji: EN

Abstrakty

EN

The presented results describe the effect of severe plastic deformation on the structure and mechanical properties of AA5083 and AA5754 alloys. Both materials were subjected to single hydrostatic extrusion (HE) and cumulative hydrostatic extrusion in the case of AA5083 and a combination of plastic deformation by equal-channel angular pressing (ECAP) with the next HE for AA5754. After the deformation, both alloys featured a homogeneous and finely divided microstructure with average grain size deq = 140 nm and 125 nm for AA5083 and AA5754, respectively. The selection of plastic forming parameters enabled a significant increase in the UTS tensile strength and YS yield stress in both alloys – UTS = 510 MPa and YS = 500 MPa for alloy AA5083 after cumulative HE, and 450 MPa and 440 MPa for alloy AA5754 after the combination of ECAP and HE, respectively. It has been shown on the example of AA5083 alloy that after the deformation the threads of the fasteners made of this material are more accurate and workable at lower cutting speeds, which saves the cutting tools. The resultant properties of AA5083 and AA5754 alloys match the minimum requirements for the strongest Al-Zn alloys of the 7xxx series, which, however, due to the considerably lower corrosion resistance, can be replaced in many responsible structures by the AA5xxx series Al-Mg alloys presented in this paper.

Słowa kluczowe

EN

AA5xxx series; ultra high mechanical properties; hydrostatic extrusion; grain refinement; workability tests

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2020
• Tom: Vol. 68, nr 4
• Strony: 903--911
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Kulczyk M.

• Institute of High Pressure Physics of the Polish Academy of Sciences UNIPRESS, Sokolowskis 29/37, 01-142 Warsaw, Poland

autor

Skiba J.

• Institute of High Pressure Physics of the Polish Academy of Sciences UNIPRESS, Sokolowskis 29/37, 01-142 Warsaw, Poland

autor

Pachla W.

• Institute of High Pressure Physics of the Polish Academy of Sciences UNIPRESS, Sokolowskis 29/37, 01-142 Warsaw, Poland

autor

Smalc-Koziorowska J.

• Institute of High Pressure Physics of the Polish Academy of Sciences UNIPRESS, Sokolowskis 29/37, 01-142 Warsaw, Poland

autor

Przybysz S.

• Institute of High Pressure Physics of the Polish Academy of Sciences UNIPRESS, Sokolowskis 29/37, 01-142 Warsaw, Poland

autor

Przybysz M.

• Institute of High Pressure Physics of the Polish Academy of Sciences UNIPRESS, Sokolowskis 29/37, 01-142 Warsaw, Poland

Bibliografia

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• [17] S.-Y. Changa, B.-D. Ahnb, S.-K. Hongc, S. Kamadod, and Y. Kojimad, “Dong Hyuk Shin Tensile deformation characteristics of a nano-structured 5083 Al alloy”, J. Alloy. Compd. 386, 197–201 (2005).
• [18] J.S. Choi, S. Nawaz, S.K. Hwang, H.C. Lee, and Y.T. Im, “Forgeability of ultra-fine grained aluminum alloy for bolt forming”, Int. J. Mech. Sci. 52, 1269–1276 (2010).
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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).