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RESEARCH INTERESTS

My research interests are focusing on the mechanical properties of metallic materials, particularly on modelling the mechanical response by using fundamental concepts of crystal plasticity and dislocation theory. The ultimate goal of this research is to equip the engineers with physically sound, yet sufficiently simple and user-friendly modelling tools that can be applied for efficient simulations of metal forming operations and the product performance under service conditions. Through my involvement in the ARC Centre of Excellence for Design in Light Alloys and the CSIRO Division of Manufacturing and Materials Technology, I participate in various projects aiming at improving the properties of Al, Mg and Ti based light alloys. A particular aim of my research is producing ultrafine grained light alloys that can be used as superior structural materials. By applying special severe plastic deformation techniques, materials with unique properties are produced. In addition to my work on light alloys, I am also involved in projects on ferrous materials. Strength and plasticity of nanomaterials is a further area to which I am dedicating a great deal of my research activities. My interest in nanomaterials goes beyond their mechanical properties, though: such aspects as suitability of nanostructured metals for applications in hydrogen storage systems, surgical implants and micro-electro-mechanical systems (MEMS) are also a significant part of my research. An entirely different area I work in (together with colleagues at UWA and international partners) is geometry-inspired design of novel materials and structures. Using geometry principles, fragmented structures can be produced, with individual ‘building blocks’ being interlocked and arrested by virtue of their geometry and arrangement only – that is, without any connectors or binder. Such structures exhibit very unusual properties, including enhanced resistance to crack propagation, exceptionally great tolerance to local failures and controllable stiffness, which opens up interesting new avenues in materials design.

SELECTED PUBLICATIONS

Constitutive modelling of strength and plasticity:

• Y. Estrin, Materials Science and Engineering: A, Vol. 463 (2007) pp. 171-176, “Constitutive modelling of creep of metallic materials: Some simple recipes”
• J.W. Dunlop, Y.J.M. Bréchet, L. Legras and Y. Estrin. Materials Science and Engineering: A, Vol. 443 (2007) pp. 77-86. “Dislocation density-based modelling of plastic deformation of Zircaloy-4”
• C. Fressengeas, A.J. Beaudoin, M. Lebyodkin, L.P. Kubin and Y. Estrin. Materials Science and Engineering A, Vol. 400-401 (2005) pp.  226-230.”Dynamic strain aging: A coupled dislocation—Solute dynamic model”
• R. Lapovok, F.H. Dalla Torre, J. Sandlin, C.H.J. Davies, E.V. Pereloma, P.F. Thomson and Y. Estrin. Journal of the Mechanics and Physics of Solids, Volume 53 (2005). “Gradient plasticity constitutive model reflecting the ultrafine micro-structure scale: the case of severely deformed copper”
• Y. Estrin and M. A. Lebyodkin, Materials Science and Engineering A, Vol. 387-389 (2004) pp. 195-198. “The influence of dispersion particles on the Portevin–Le Chatelier effect: from average particle characteristics to particle arrangement”
• Hyoung Seop Kim, Yuri Estrin, Elazar Y. Gutmanas and Chang Kyu Rhee. Materials Science and Engineering A, Vol. 307 (2001) pp. 67-73. “A constitutive model for densification of metal compacts: the case of copper”.
• H. S. Kim, Y. Estrin and M. B. Bush. Acta Materialia, Vol. 48 (2000) pp. 493-504. “Plastic deformation behaviour of fine-grained materials”
• Y. Estrin, L. S. Tóth, A. Molinari and Y. Bréchet. Acta Materialia, Vol. 46 (1998) pp. 5509-5522. “A dislocation-based model for all hardening stages in large strain deformation”

Nanostructured and ultra-fine grained materials:

• Y. Estrin, N.V. Isaev, S.V. Lubenets, S.V. Malykhin, A.T. Pugachov, V.V. Pustovalov, E.N. Reshetnyak, V.S. Fomenko, L.S. Fomenko, S.E. Shumilin, et al. Acta Materialia, Vol. 54 (2006) pp. 5581-5590.
  “Effect of microstructure on plastic deformation of Cu at low homologous temperatures”
• O.V. Gendelman, M. Shapiro, Y. Estrin, R.J. Hellmig and S. Lekhtmakher. Materials Science and Engineering: A, Volume 434 (2006) pp. 88-94. “Grain size distribution and heat conductivity of copper processed by equal channel angular pressing”
• Y. Estrin, E. Rabkin, R.J. Hellmig, M. Kazakevich and A. Zi. Materials Science and Engineering: A, Vol. 410-411 (2005)  pp. 165-168 “Severe plastic deformation by solid state infiltration”.
• Y. Estrin, G. Gottstein and L. S. Shvindlerman. Scripta Materialia, Vol. 50 (2004) pp. 993-997. “Diffusion controlled creep in nanocrystalline materials under grain growth”
• Y. Estrin, G. Gottstein, E. Rabkin and L. S. Shvindlerman. Acta Materialia, Vol. 49 (2001) pp. 673-681. “Grain growth in thin metallic films”
• Y. Estrin, G. Gottstein, E. Rabkin and L. S. Shvindlerman. Scripta Materialia, Vol. 43 (2000) pp. 141-147. “On the kinetics of grain growth inhibited by vacancy generation”

Light alloys:

• M. Janeček, M. Popov, M.G. Krieger, R.J. Hellmig and Y. Estrin. Materials Science and Engineering: A, Vol. 462 (2007) pp. 116-120. “Mechanical properties and microstructure of a Mg alloy AZ31 prepared by equal-channel angular pressing”
  

• R. Lapovok, P.F. Thomson, R. Cottam and Y. Estrin. Materials Science and Engineering: A, Vol. 410-411 (2005) pp. 390-393. “Processing routes leading to superplastic behaviour of magnesium alloy ZK60”
• Yuri Estrin, Ralph J. Hellmig, Miloš Janecek, Torbjørn T. Lamark, Zuzana Zúberová, Rimma Lapovok, and Mikhail V. Popov.In: Ultrafine Grained Materials IV. Edited by Y.T. Zhu, T.G. Langdon, Z. Horita, M.J. Zehetbauer, S.L. Semiatin, and T.C. Lowe. TMS (The Minerals, Metals & Materials Society), 2006, pp. 381-388.“Effect of ECAP on the mechanical properties of Mg alloys”
• S. Zhang, P. G. McCormick and Y. Estrin. Acta Materialia, Volume 49 (2001) pp. 1087-1094.
  “The morphology of Portevin–Le Chatelier bands: finite element simulation for Al–Mg–Si”
• G. Bermig, A. Bartels, H. Mecking and Y. Estrin. Materials Science and Engineering A, Vol. 234-236 (1997) pp. 904-907. “A unique description of steady state deformation of Al and Al-Mg alloys”
  

Topological interlocking as a new design principle:

• A. Molotnikov, Y. Estrin, A.V. Dyskin, E. Pasternak and A.J. Kanel-Belov, Engineering Fracture Mechanics, Vol 7 (2007) pp. 1222-1232. “Percolation mechanism of failure of a planar assembly of interlocked osteomorphic elements”
• A.V. Dyskin, Y. Estrin, E. Pasternak, H.C. Khor and A.J. Kanel-Belov. Acta Astronautica, Vol. 57 (2005) pp. 10-21. “The principle of topological interlocking in extraterrestrial construction”
• Y. Estrin, A. V. Dyskin, E. Pasternak, S. Schaare, S. Stanchits and A. J. Kanel-Belov. Scripta Materialia, Vol. 50 (2004) pp. 291-294. “Negative stiffness of a layer with topologically interlocked elements”

Hydrogen storage:

• V. Skripnyuk, E. Buchman, E. Rabkin, Y. Estrin, M. Popov and S. Jorgensen, Journal of Alloys and Compounds, Vol. 436 (2007) pp. 99-106. “The effect of equal channel angular pressing on hydrogen storage properties of a eutectic Mg–Ni alloy”
• V. M. Skripnyuk, E. Rabkin, Y. Estrin and R. Lapovok. Acta Materialia, Vol. 52(2004) pp. 405-414
  “The effect of ball milling and equal channel angular pressing on the hydrogen absorption/desorption properties of Mg–4.95 wt% Zn–0.71 wt% Zr (ZK60) alloy”

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