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Reduction of the residual stresses in cold expanded thick-walled cylinders by plastic compression

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Defence Technology（防务技术） 2016年第6期12卷 473-479页

作者： V.F. SKVORTSOV A.O. BOZNAK A.B. KIM A. Yu ARLYAPOV A.I. DMITRIEV Department of Automated Engineering Technology Tomsk Polytechnic University Lenin Av. 30 Tomsk Russia institute of Strength Physics and Materials Science sb ras Akademicheski 2/4 Tomsk Russia

We suppose that in order to maintain high accuracy of holes and to lower residual stresses after cold expansion of thick-walled cylinders, which undergo cross-section plastic deformation, it is necessary to perform axial plastic compression and subsequent cold expansion with small interferences. To test this hypothesis, we studied hoop, radial and axial residual stresses in cylinders made of carbon steel AISI 1050 with hole diameter of 5 mm, outer diameter of 15 mm and length of 30 mm by Sachs method as well as accuracy of expanded holes. It is found that double cold expansion with total interference equal to 5.1% generates hoop residual stresses with largest absolute value equal to 284 MPa and ensures high holes accuracy(IT7). After plastic compression with strain equal to 0.5 and 1% the mentioned stresses reduced to 120 and 75 MPa respectively,and accuracy of the holes reduced as well. Subsequent cold expansion with small interference equal to 0.9% helps to restore holes accuracy(IT7)gained by double cold expansion and ensure that absolute value of hoop residual stresses(177 MPa) is lower compared to double cold expansion.

关键词： Thick-walled cylinders Cold expansion Plastic compression Residual stresses

Unexpected giant negative area compressibility in palladium diselenide

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National Science Review 2023年第9期10卷 146-153页

作者： Xingxing Jiang Shengzi Zhang Dequan Jiang Yonggang Wang Maxim S.Molokeev Naizheng Wang Youquan Liu Xingyu Zhang Zheshuai Lin New Functional Crystals Group Key Laboratory of Functional Crystals and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of Sciences 2. Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences University of Chinese Academy of Sciences Center for High Pressure Science &Technology Advanced Research School of Materials Science and Engineering Peking University Laboratory of Crystal Physics Kirensky Institute of PhysicsSB RAS 7. Department of Physics Far Eastern State Transport University 8. International Research Center of Spectroscopy and Quantum ChemistrySiberian Federal University

Negative area compressibility(NAC) is a counterintuitive ’squeeze-expand’ behavior in solids that is very rare but attractive due to possible pressure-response applications and coupling with rich physicochemical ***,NAC behavior is reported in palladium diselenide with a large magnitude and wide pressure *** discover that,apart from the rigid flattening of layers that has been generally recognized,the unexpected giant NAC effect in PdSe2largely comes from anomalous elongation of intralayer chemical *** structural variations are driven by intralayer-to-interlayer charge transfer with enhanced interlayer interactions under *** work updates the mechanical understanding of this anomaly and establishes a new guideline to explore novel compression-induced properties.

关键词： negative area compressibility Lifshitz mechanism charge transfer

Composition of the Diamond Indicator Minerals on the Mitchell Chart――Criteria of CLIPPIR Diamonds in Kimberlites and Conditions of their Mantle Crystallization

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 121-124页

作者： Vladimir N.ZINCHENKO Alexandr S.IVANOV Igor V.ASHCHEPKOV CATOCA Mining Society СatocaAngola ALROSA Ltd. MirnyRussia V.S.Sobolev institute of Geology and Mineralogy sb ras NovosibirskRussia

In the last decade,researchers have been particularly interested in IIa CLIPPIR type diamonds,which differ in composition and physical characteristics from diamonds of peridotite related"P"and eclogite related"E"***(Moore,2009)sought them as mantle kimberlite related megacrysts,but light C isotopy and chemical features needs special explanation.

关键词： CLIPPIR diamonds kimberlite mantle pyrope clinopiroxene chromite ilmenite

A new species of extinct genus Lycopodites from Lower to Middle Jurassic sediments of Irkutsk coal basin (Eastern Siberia)

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Global Geology 2014年第1期17卷 1-10页

作者： Andrei O.Frolov Irina M.Mashchuk institute of the Earth's Crust SB RAS

In Jurassic sediments of Siberia,remains of Lycopodites are rare in occurrence. They are represented by two species: Lycopodites tenerrimus Heer,and L.( ?) trichiatus Pryn. This paper presents an emended diagnosis of the species L.( ?) trichiatus Pryn.,and the descriptions of two new species: Lycopodites subulifolius sp. nov.,and L. baikalensis sp. nov. from the Early--Middle Jurassic sediments of the Irkutsk coal basin,Eastern Siberia,Russia. As part of the research effort,it was found that the ecological preference of the new species was different: Lycopodites subulifolius sp. nov. grew in wet and open spaces,while Lycopodites baikalensis sp. nov. preferred to colonize young growth of bog forests.

关键词：东西伯利亚伊尔库茨克中侏罗世沉积物煤盆地新种灭绝开放空间

Negative thermal expansion in one-dimension of a new double sulfate AgHo(SO_(4))_(2)with isolated SO_4 tetrahedra

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Journal of Materials Science & Technology 2021年第17期76卷 111-121页

作者： Yuriy G.Denisenko Victor V.Atuchin Maxim S.Molokeev Naizheng Wang Xingxing Jiang Aleksandr S.Aleksandrovsky Alexander S.Krylov Aleksandr S.Oreshonkov Alexander E.Sedykh Svetlana S.Volkova Zheshuai Lin Oleg V.Andreev Klaus Müller-Buschbaum institute of Chemistry Tyumen State University.Tyumen625003Russia institute of Inorganic and Analytical Chemistry Justus-Liebig-University of Giessen35392Giessen.Germany Department of General and Special Chemistry Industrial University of TyumenTyumen625000Russia Laboratory of Optical Materials and Structures Institute of Semiconductor PhysicsSB RASNovosibirsk630090Russia Laboratory of Semiconductor and Dielectric Materials Novosibirsk State UniversityNovosibirsk630090Russia Research and Development Department.Kemerovo State University Kemerovo650000Russia Laboratory of Crystal Physics Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia Siberian Federal University Krasnoyarsk660041Russia Department of Physics Far Eastern State Transport UniversityKhabarovsk680021Russia Technical institute of Physics and Chemistry Chinese Academy of SciencesBeijing100190China Laboratory of Coherent Optics Kirensky Institute of Physics.Federal Research Center KSC SB RASKrasnoyarsk660036Russia institute of Nanotechnology Spectroscopy and Quantum ChemistrySiberian Federal UniversityKrasnoyarsk660041Russia Laboratory of Molecular Spectroscopy Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia Center for Materials Research(LaMa) Justus-Liebig-University GiessenGiessen35392Germany University of the Chinese Academy of Sciences Beijing100049China Laboratory of the Chemistry of Rare Earth Compounds Institute of Solid State ChemistryUB RASEkaterinburg620137Russia

A double holmium-silver sulfate was obtained for the first *** temperature intervals for the formation and stability of the compound were determined by differential scanning *** crystal structure of AgHo(SO_(4))_(2)was determined by Rietveld *** X-ray diffraction(XRD)analysis showed that the compound crystallizes in the monoclinic syngony,space group P2_1/m,with the unit cell parameters a=4.71751(4)A,b=6.84940(6)A and c=9.89528(9)A,β=95.1466(4)·,V=318.448(5)A^(3),Z=2,R_B=1.55%,T=303 *** types of sulfate tetrahedra were found in the structure,which significantly affected the spectral properties in the infrared *** the temperature range of 143-703 K,a negative thermal expansion along the b direction accompanied by a positive thermal expansion along the a and c directions was *** was established that negative thermal expansion is the result of the deformation of sulfate tetrahedra,which is affected by the movement of holmium and silver *** excitation in the blue spectral range(457.9 nm)produces a luminescence in light blue(489 nm),green(545 nm)and red(654 nm)spectral ranges,and the latter two were of comparable intensity that is favorable for WLED *** observed luminescent band distribution is ascribed to the specific crystal field at Ho^(3+)ion sites rather than a variation of radiationless probability.

关键词： Sulfate Crystal structure Thermal expansion Raman Photoluminescence Band structure

Catalytic Activity of Nanodiamonds in Azocoupling Reaction

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Journal of Biomaterials and Nanobiotechnology 2014年第3期5卷 173-178页

作者： Nikita O. Ronzhin Alexey P. Puzyr Andrey E. Burov Vladimir S. Bondar institute of Biophysics sb ras Krasnoyarsk Russia Special Design-Technology Bureau “Nauka” sb ras Krasnoyarsk Russia

The catalytic efficiency of modified nanodiamonds (MND) in reactions of interaction between organic compounds was demonstrated on the example of azocoupling reaction (hydrogen peroxide-4-aminoantipyrine-phenol). It was found that catalytic action of MND was caused by redox active metal ions of Fe and Cu located on the MND surface. The neutralization of the ions significantly decreased catalytic properties of MND.

关键词： Diamond Nanoparticles Catalytic Activity Metal Ions Organic Reaction

Subnanosecond high-voltage breakdown initiated in high-pressure nitrogen by a runaway electron beam

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High Voltage 2017年第2期2卷 56-59页

作者： Alexander G.Burachenko Victor F.Tarasenko Evgenii Kh.Baksht institute of High Current Electronics sb ras Tomsk 634055Russia National Research Tomsk State University Tomsk 634050Russia National Research Tomsk Polytechnic University Tomsk 634050Russia

This study reports on subnanosecond breakdowns initiated on high pressure nitrogen by a runaway electron beam in an inhomogeneous electric *** is shown that a diffuse discharge with a duration of≥1 ns is formed in the gas *** are reported for the first time on collector measurements of a supershort avalanche electron beam downstream of an anode foil at a nitrogen pressure of 0.5–1.2 *** beam pulsewidth at these pressures is∼90 *** a nitrogen pressure of 1.2 MPa,the number of electrons with an energy>70 keV recorded by the collector is 4×10^(6)/cm^(2).

关键词： field initiated beam

Suspension Culture and Somatic Embryogenesis of Korean Pine

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Phyton-International Journal of Experimental Botany 2022年第1期91卷 223-238页

作者： Chunxue Peng Fang Gao Hao Wang Iraida Nikolaevna Tretyakova Alexander Mikhaylovich Nosov Hailong Shen Ling Yang State Key Laboratory of Tree genetics and Breeding School of ForestryNortheast Forestry UniversityHarbin150040China State Forestry and Grassland Administration Engineering Technology Research Center of Korean Pine Harbin150040China Laboratory of Forest genetics and Breeding Institution of the Russian Academy of SciencesV.N.Sukachev Institute of Forest Siberian Branch of RASKrasnoyarsk660036Russia Department of Cell Biology and institute of Plant Physiology K.A.Timiryazev Russian Academy of SciencesMoscow127276Russia Department of Plant Physiology Biological FacultyLomonosov Moscow State UniversityMoscow119991Russia

Korean pine is an important afforestation tree species in Northeast China,which has a high ecological and economic *** regeneration of somatic embryogenesis using immature zygotic embryos of Korean pine as explants has been successful,it cannot be applied to automation and large-scale ***,we urgently need a method that can increase the output of somatic embryos(SEs)to meet the needs of large-scale *** used Korean pine 1-1 and 1-100 cell lines as research materials to evaluate the effects of inoculum-density,culture time,orbiting speed,vessel volume,plant growth regulator(PGR)concentration,and carbon source on the proliferation of embryogenic tissue(ET).The somatic embryogenesis ability of ET cultured in different liquid suspension media was also *** found that during liquid suspension culture of Korean pine ET,the sedimented cell volume(SCV),fresh weight(FW)and dry weight(DW)were affected by inoculumdensity,culture time,orbiting speed,2,4-D concentration,6-BA concentration and carbon source *** mg⋅mL^(−1)ET were transferred to a 200 mL Erlenmeyer flask containing 20 mL liquid medium,and cultured at 100 rpm/min for 14 days to obtain the maximum *** addition,we also found that SCV,FW and DW were higher when PGRs were reduced in the liquid suspension *** substitution of maltose for sucrose resulted in slow growth of cultures and limited SE yield(13 SEs g^(−1)FW).Although culture proliferation was high at 50 rpm,SE yield was inhibited by 48%compared with 100 rpm(50 rpm=33 SEs g^(−1)FW;100 rpm/min=70 SEs g^(−1)FW).Cultivation in low-concentration PGR(1.15μM⋅L^(−1)2,4-D,0.25μM⋅L^(−1)6-BA)and sucrose liquid medium at 100 rpm/min(80 SEs g^(−1)FW)could not only promote culture proliferation but also increase SE *** determination of the suspension culture scheme of Korean pine ET provides a reference for further expansion to bioreactor culture in the future and lays a foundation for the automatio

关键词： Pinus koraiensis Sieb.et Zucc embryogenic tissue liquid suspension medium cell proliferation

A Recursive Probabilistic Inversion of Satellite Gradiometry Data for the Upper Mantle Density Variation

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 7-8页

作者： Alexander MINAKOV Dmitriy KOLYUKHIN The Centre for Earth Evolution and Dynamics University of OsloBoks 1072 Blindern0316 OsloNorway A.A.Trofimuk institute of Petroleum Geology and Geophysics sb ras NovosibirskRussia

We describe a method to perform a constrained lithospheric-scale inversion of satellite gravity gradient *** a priori constraints include:i)data covariance matrix;ii)prior model covariance matrix including a model for... 详细信息

关键词： lithosphere earth’s structure potential fields inverse problems satellite gradiometry north Atlantic