A New Deformation Region and How Low Do You Go? – "Intrinsic Deformation Limit"

Jun Jie Shen; Kenichi Ikeda; Satoshi Hata; Hideharu Nakashima

doi:10.4028/www.scientific.net/MSF.747-748.559

Paper Titles

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HomeMaterials Science ForumMaterials Science Forum Vols. 747-748A New Deformation Region and How Low Do You Go? –...

A New Deformation Region and How Low Do You Go? – "Intrinsic Deformation Limit"

Abstract:

The creep deformation in pure aluminum was investigated using helicoid spring samples at room temperature, 298 K, and σ < 1.19 MPa. It was found that the stress exponent is n = 0, which means the creep behavior in this region is independent on applied stress but some physical properties of materials. The creep behavior was suggested to be controlled by surface diffusion based on the strongly effect of surface area on creep behavior only in this creep region (n = 0). The threshold creep rate, , called intrinsic deformation limit, decided by surface diffusion was suggested. This discovery provided a new perspective to understand the extremely slow deformation in the nature.

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Periodical:

Materials Science Forum (Volumes 747-748)

Pages:

559-563

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.747-748.559

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Online since:

February 2013

Authors:

Jun Jie Shen, Kenichi Ikeda, Satoshi Hata, Hideharu Nakashima

Keywords:

Creep, Pure Aluminium, Stress Exponent, Surface Diffusion, Very Low Stress

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References

[1] H. Luthy, A.K. Miller, O.D. Sherby, The stress and temperature dependence of steady-state flow at intermediate temperatures for pure polycrystalline aluminum, Acta Metall. 28 (1980) 169-178.

DOI: 10.1016/0001-6160(80)90066-8

Google Scholar

[2] K. Ishikawa, M. Maehara, Y.K. Kobayashi, Mechanical modeling and microstructural observation of pure aluminum crept under constant stress, Mater. Sci. Eng. AA. 322 (2002) 153-158.

DOI: 10.1016/s0921-5093(01)01128-5

Google Scholar

[3] T. Matsunaga, S. Ueda, E. Sato, New creep region in pure face-centered cubic metals at low temperature, Scripta Mater. 63 (2010) 516-519.

DOI: 10.1016/j.scriptamat.2010.05.019

Google Scholar

[4] J.J. Shen, S. Yamasaki, K. Ikeda, S. Hata, H. Nakashima, Low-temperature creep at ultra-low strain rates in pure aluminum studied by a helicoid spring specimen technique, Mater. Transaction . 52 (2011) 1381-1387.

DOI: 10.2320/matertrans.m2010405

Google Scholar

[5] L. Kloc, P. Mareek, Measurement of very low creep strains: A review [J], Journal of Testing and Evaluation. 37 (2009) 53-58.

Google Scholar