Controlling Mechanisms of Creep Deformation of New Air-Hardenable TiAl-Based Alloy

• Authors: H. Staneková , J. Lapin , T. Pelachová
• Languages of publication: EN

Abstracts

EN

In the present work, controlling mechanisms of creep deformation of a new cast air-hardenable Ti-46Al-8Ta [at.%] alloy was studied. Long-term constant load tensile creep tests combined with an abrupt change of the applied stress were performed at 700°C. The response of the alloy to a stress reduction is analyzed. Transient behaviour with zero creep before recommencing creep at a reduced load is related to possible creep deformation mechanisms. The dislocation microstructures are analysed for creep strains corresponding to the minimum creep rate by transmission electron microscopy. The controlling mechanisms of creep deformation are identified from the transient creep behaviour of the alloy during stress reduction, the stress exponent and dislocation microstructures observed after creep testing.

Keywords

EN

61.72.-y; 62.20.F-; 62.40.+i; 81.30.Mh; 83.50.-v

Discipline

• 62.20.F-: Deformation and plasticity(see also 83.50.-v Deformation and flow in rheology; for materials treatment effects on deformation, see 81.40.Lm)
• 83.50.-v: Deformation and flow
• 62.40.+i: Anelasticity, internal friction, stress relaxation, and mechanical resonances(for materials treatment effects on anelasticity, see 81.40.Jj in materials science)
• 81.30.Mh: Solid-phase precipitation(for precipitation hardening, see 81.40.Cd)
• 61.72.-y: Defects and impurities in crystals; microstructure(for radiation induced defects, see 61.80.-x; for defects in surfaces, interfaces, and thin films, see 68.35.Dv and 68.55.Ln; see also 85.40.Ry Impurity doping, diffusion, and ion implantation technology; for effects of crystal defects and doping on superconducting transition temperature, see 74.62.Dh)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 512-515

Dates

published

2012-09

Contributors

author

H. Staneková

• Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Račianska 75, 831 02 Bratislava, Slovak Republic

author

J. Lapin

• Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Račianska 75, 831 02 Bratislava, Slovak Republic

author

T. Pelachová

• Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Račianska 75, 831 02 Bratislava, Slovak Republic

References

• [1] J. Lapin, Z. Gabalcová, O. Bajana, Kovove Mater. 47, 159 (2009)
• [2] W.J. Zhang, S.C. Deevi, Mater. Sci. Eng. A 362, 280 (2003)
• [3] D. Hu, A.J. Huang, X. Wu, Intermetallics 15, 327 (2007)
• [4] H. Saage, A.J. Huang, D. Hu, M.H. Loretto, X. Wu, Intermetallics 17, 32 (2009)
• [5] J. Lapin, K. Frkáňová, Kovove Mater. 49, 243 (2011)
• [6] J. Aguilar, A. Schievenbusch, O. Kättlitz, Intermetallics 19, 757 (2011)
• [7] Q. Luan, Q. Duan, X. Wang, J. Liu, L. Peng, Mater. Sci. Eng. A 527, 4484 (2010)
• [8] F. Appel, R. Wagner, Mater. Sci. Eng. R 22, 187 (1998)
• [9] W.J. Zhang, S.C. Deevi, Intermetallics 10, 603 (2002)
• [10] J. Lapin, Kovove Mater. 43, 81 (2005)
• [11] J. Lapin, T. Pelachová, M. Dománková, Intermetallics 19, 819 (2011)
• [12] J. Lapin, H. Staneková, Acta Phys. Pol. A 122, 453 (2012)
• [13] H. Jiang, K. Zhang, X.J. Hao, H. Saage, N. Wain, D. Hu, M.H. Loretto, X. Wu, Intermetallics 18, 938 (2010)
• [14] J. Aguilar, U. Hecht, A. Schievenbusch, Mater. Sci. Forum 638-642, 1275 (2010)
• [15] J. Lapin, T. Pelachová, H. Staneková, M. Dománková, Kovove Mater. 48, 337 (2010)
• [16] J. Lapin, Intermetallics 14, 115 (2006)
• [17] V. Recina, D. Lundström, B. Karlsson, Metall. Mater. Trans. A 33A, 2869 (2002)
• [18] J. Lapin, Scr. Mater. 50, 261 (2004)
• [19] T.A. Parthasarathy, M.G. Mendiratta, D.M. Dimiduk, Scr. Mater. 37, 315 (1997)
• [20] J. Čadek, Creep in Metallic Materials, Elsevier, New York 1988, p. 181
• [21] F. Appel, Intermetallics 9, 907 (2001)
• [22] A. Dlouhý, K. Kuchařová, J. Březina, Mater. Sci. Eng. A 319-321, 820 (2001)

Identifiers

DOI

10.12693/APhysPolA.122.512