Subsurface shear instability and nanostructuring of metals in sliding; Wear; Vol. 268, iss. 1-2
| Parent link: | Wear: Scientific Journal Vol. 268, iss. 1-2.— 2010.— [P. 59-66] |
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| Yazar: | |
| Diğer Yazarlar: | , |
| Özet: | Title screen Dry sliding wear conditions were used to obtain a 500 m-thick layer of nanosize grains on copper samples. As shown, this layer reveals a flow behavior pattern similar to that of a viscous non-Newtonian fluid. Four structurally different zones were found in the longitudinal cross-sections of samples below the worn surface. Upper two of them are nanocrystalline and consist of many 1 m-thick sublayers, which show either laminar or turbulent flow behavior. These sublayers demonstrate different levels of elasticity as compared to each other and may be related to an interplay between work-hardening and thermal softening. Lower two zones undergo usual plastic deformation and severe fragmentation without viscous mass transfer. High level of Young's modulus in the fragmentation zone is evidence of insufficient thermal softening at that depth. We believe that viscous flow zones are the result of shear instability and subsequent shear deformation developed in subsurface layers due to thermal softening. Numerical study has been carried out to simulate friction-induced deformation and shear instability under conditions close to the experiment. As shown, such a situation is possible when deformation-generated heat is taken into account. Another interesting result relates to the sublayers’ strain rate distribution. It was found that 1 ?m-thick sublayers may show either high strain rate gradient or zero strain rate as a function of depth below the worn surface. The latter case means that a pack of layers may exist and behave like an elastic body in ductile medium Режим доступа: по договору с организацией-держателем ресурса |
| Dil: | İngilizce |
| Baskı/Yayın Bilgisi: |
2010
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| Konular: | |
| Online Erişim: | http://dx.doi.org/10.1016/j.wear.2009.06.027 |
| Materyal Türü: | Elektronik Kitap Bölümü |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=636210 |
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| 200 | 1 | |a Subsurface shear instability and nanostructuring of metals in sliding |f S. Yu. Tarasov, V. Rubtsov, A. V. Kolubaev | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: p. 66 (15 tit.)] | ||
| 330 | |a Dry sliding wear conditions were used to obtain a 500 m-thick layer of nanosize grains on copper samples. As shown, this layer reveals a flow behavior pattern similar to that of a viscous non-Newtonian fluid. Four structurally different zones were found in the longitudinal cross-sections of samples below the worn surface. Upper two of them are nanocrystalline and consist of many 1 m-thick sublayers, which show either laminar or turbulent flow behavior. These sublayers demonstrate different levels of elasticity as compared to each other and may be related to an interplay between work-hardening and thermal softening. Lower two zones undergo usual plastic deformation and severe fragmentation without viscous mass transfer. High level of Young's modulus in the fragmentation zone is evidence of insufficient thermal softening at that depth. We believe that viscous flow zones are the result of shear instability and subsequent shear deformation developed in subsurface layers due to thermal softening. Numerical study has been carried out to simulate friction-induced deformation and shear instability under conditions close to the experiment. As shown, such a situation is possible when deformation-generated heat is taken into account. Another interesting result relates to the sublayers’ strain rate distribution. It was found that 1 ?m-thick sublayers may show either high strain rate gradient or zero strain rate as a function of depth below the worn surface. The latter case means that a pack of layers may exist and behave like an elastic body in ductile medium | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Wear |o Scientific Journal | ||
| 463 | |t Vol. 268, iss. 1-2 |v [P. 59-66] |d 2010 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a sliding | |
| 610 | 1 | |a скольжение | |
| 610 | 1 | |a shear instability | |
| 610 | 1 | |a нестабильность | |
| 610 | 1 | |a strain localization | |
| 610 | 1 | |a локализация | |
| 610 | 1 | |a nanostructuring | |
| 610 | 1 | |a наноструктурирование | |
| 610 | 1 | |a viscous flow | |
| 610 | 1 | |a вязкое течение | |
| 610 | 1 | |a numerical simulation | |
| 610 | 1 | |a численное моделирование | |
| 700 | 1 | |a Tarasov |b S. Yu. |c specialist in the field of mechanical engineering |c Professor of Tomsk Polytechnic University, Doctor of technical sciences |f 1959- |g Sergei Yulievich |3 (RuTPU)RU\TPU\pers\31400 |9 15572 | |
| 701 | 1 | |a Rubtsov |b V. E. |c physicist |c engineer Tomsk Polytechnic University, candidate of physical and mathematical Sciences |f 1970- |g Valery Evgenjevich |3 (RuTPU)RU\TPU\pers\34118 | |
| 701 | 1 | |a Kolubaev |b A. V. |c physicist |c Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences |f 1948- |g Aleksander Viktorovich |3 (RuTPU)RU\TPU\pers\31404 | |
| 801 | 2 | |a RU |b 63413507 |c 20150407 |g RCR | |
| 856 | 4 | |u http://dx.doi.org/10.1016/j.wear.2009.06.027 | |
| 942 | |c CF | ||