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100			_a20200110a2019 k y0engy50 ba
101	0		_aeng
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135			_adrcn ---uucaa
181		0	_ai
182		0	_ab
200	1		_aOn Combined Quantized and Mechanical Descriptions of the Chernov-Luders Macroband of Localized Deformation _fA. A. Reshetnyak, E. V. Shilko, Yu. P. Sharkeev
203			_aText _celectronic
300			_aTitle screen
320			_a[References: 11 tit.]
330			_aWe suggest the quantized approach, based on the recently proposed statistical theory of flow stress for the polycrystalline materials under quasi-static plastic deformation, in order to theoretically describe the Chernov-Luders shear macroband of localized deformation, which is manifested in a number of Fe-containing materials with the second phase presence beyond the yield strength point on the stress-strain curve, [sigma]=[sigma](epsilon). The procedure essentially uses the quasi-particle interpretation for the part of the minimal mechanical energy for given single-mode polycrystalline aggregate to be necessary to create, according to thermal-fluctuation mechanism, the 0D-defect - nanopore as the initial zone of localized deformation under external loading. With help of the quasi-particles description the analytical expressions both for the scalar density of dislocations for given grain sizes, temperature, the most probable sliding system and for the [sigma]=[sigma](epsilon) dependence itself. A two-level system, which characterizes the mechanism of absorption and emission of such quasi-particles (dislocons) by the crystal lattice of any grain under quasi-static loading permits to effectively describe the physics of the appearance and propagation of the Chernov-Luders shear macroband. The experimentally observed enhancement of the acoustic emission, accompanying the phenomenon, justifies the interpretation of the dislocon as the composite short-lived particle consisting of acoustic phonons. The case of more realistic three-level system within two-phase model for real polycrystalline samples is suggested as well.
333			_aРежим доступа: по договору с организацией-держателем ресурса
461		0	_0(RuTPU)RU\TPU\network\4816 _tAIP Conference Proceedings
463		0	_0(RuTPU)RU\TPU\network\31884 _tVol. 2167 : Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2019 (AMHS'19) _oProceedings of the International Conference, 1–5 October 2019, Tomsk, Russia _fNational Research Tomsk Polytechnic University (TPU) ; Institute of Strength Physics and Materials Science SB RAS (Russia) ; eds. V. E. Panin ; S. G. Psakhie ; V. M. Fomin _v[020292, 6 p.] _d2019
610	1		_aэлектронный ресурс
610	1		_aтруды учёных ТПУ
610	1		_aмеханические характеристики
610	1		_aдеформации
610	1		_aполикристаллические материалы
610	1		_aпластические деформации
610	1		_aскалярная плотность
610	1		_aквантовый подход
610	1		_aстатическая теория
610	1		_aквазичастицы
610	1		_aакустическая эмиссия
610	1		_aтепловые флуктуации
700		1	_aReshetnyak _bA. A.
701		1	_aShilko _bE. V. _cphysicist _cengineer of Tomsk Polytechnic University, Doctor of physical and mathematical sciences _f1973- _gEvgeny Viktorovich _2stltpush _3(RuTPU)RU\TPU\pers\35909
701		1	_aSharkeev _bYu. P. _cphysicist _cProfessor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences _f1950- _gYury Petrovich _2stltpush _3(RuTPU)RU\TPU\pers\32228
712	0	2	_aНациональный исследовательский Томский политехнический университет _bИсследовательская школа физики высокоэнергетических процессов _c(2017- ) _h8118 _2stltpush _3(RuTPU)RU\TPU\col\23551
801		2	_aRU _b63413507 _c20200110 _gRCR
856	4		_uhttps://doi.org/10.1063/1.5132159
942			_cCF