Instability of plastic deformation in model Al-Li based alloys subjected to tension.

• Autorzy: Jaźwińska A. , Mizera J. , Wyrzykowski J.W.
• Konferencja: Vth Physical Metallurgy and Materials Science Conference on Advanced Materials & Technologies AMT'98, 17-21 May 1998, Kraków-Krynica, Poland
• Języki publikacji: EN

Abstrakty

EN

The paper analyses the instability of plastic deformation in Al-Li-Cu-Zr that occurs during an uniaxial tensile test. The instability is manifested in the form of serrations which appear on the stress-strain curve (sigma-epsilon). The analysis of plastic instability in this alloy was concerned with the relation between this instability and the initial deformation degree (sheets after rolling) and sheet anisotropy. The plastic instability was described quantitatively using mathematical tools. A quantitative analysis of the serration has shown that, in the precipitation hardened alloy, as the deformation degree increases the intensity of the serrations observed on the stress-strain curve and the individual sample cutting directions (with respect to the axes of the sheet anisotropy) increases. In the alloy subjected to saturation, no essential differences in the character of the stress-strain curve serrations were observed.

Słowa kluczowe

EN

plastic deformation; aluminium; lithium; alloy; tension; tensile test

PL

odkształcenie plastyczne; aluminium; lit; stop; rozciąganie; próba rozciągania

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 3
• Strony: 604--607
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Jaźwińska A.

• Materials Science and Engineering Department, Warsaw University of Technology

autor

Mizera J.

• Materials Science and Engineering Department, Warsaw University of Technology

autor

Wyrzykowski J.W.

• Materials Science and Engineering Department, Warsaw University of Technology

• Warsaw University of Technology, Materials Science and Engineering Department

Bibliografia

• [1] A. H. Cottrell, Phil. Mag., 44 (1953) 829.
• [2] J. W. Wyrzykowski, W. Przetakiewicz, K. J. Kurzydłowski, Biuletyn WAT, 2 (390) (1985) 61.
• [3] V. Jeanclaude, C. Fressengeas, Scripta Metall. Mater., 29 (1993) 1177.
• [4] B. J. Bridley, P. J. Worthington, Acta Metall. Mater., 17 (1969) 1357.
• [5] J. Mizera, PhD Thesis, INPG Grenoble, EMSE St-Etienne, France, 1993.
• [6] K. J. Kurzydłowski, B. Ralph, The Quantitative Description of the Microstructure of Materials, CRC Press, U.K., 1995.