| 000 | 03967nlm1a2200505 4500 | ||
|---|---|---|---|
| 001 | 668166 | ||
| 005 | 20231030042139.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\39390 | ||
| 035 | _aRU\TPU\network\39277 | ||
| 090 | _a668166 | ||
| 100 | _a20220627a2022 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aCrystal Structure Defects in Titanium Nickelide after Abc Pressing at Lowered Temperature _fA. I. Lotkov, V. N. Grishkov, R. S. Laptev [et al.] |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: 74 tit.] | ||
| 330 | _aThe experimental results regarding the effect of warm (573 K) abc pressing with an increase in the specified true strain, e, up to 9.55, on the microstructure and crystal structure defects (dislocations, vacancies) of the Ti49.8Ni50.2 (at %) alloy are presented. It is shown that all samples (regardless of e) have a two-level microstructure. The grains-subgrains of the submicrocrystalline scale level are in the volumes of large grains. The average sizes of both large grains and subgrain grains decrease with increasing e to 9.55 (from 27 to 12 µm and from 0.36 to 0.13 µm, respectively). All samples had a two-phase state (rhombohedral R and monoclinic B19′ martensitic phases) at 295 K. The full-profile analysis of X-ray reflections of the B2 phase obtained at 393 K shows that the dislocation density increases from 1014 m−2 to 1015 m−2 after pressing with e = 1.84 and reaches 2·1015 m−2 when e increases to 9.55. It has been established by positron annihilation lifetime spectroscopy that dislocations are the main type of defects in initial samples and the only type of defects in samples after abc pressing. The lifetime of positrons trapped by dislocations is 166 ps, and the intensity of this component increases from 83% in the initial samples to 99.4% after pressing with e = 9.55. The initial samples contain a component with a positron lifetime of 192 ps (intensity 16.4%), which corresponds to the presence of monovacancies in the nickel sublattice of the B2 phase (concentration ≈10−5). This component is absent in the positron lifetime spectra in the samples after pressing. The results of the analysis of the Doppler broadening spectroscopy correlate with the data obtained by the positron annihilation lifetime spectroscopy. | ||
| 461 | _tMaterials | ||
| 463 |
_tVol. 15, iss. 12 _v[4298, 15 p.] _d2022 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _atitanium nickelide | |
| 610 | 1 | _aabc pressing | |
| 610 | 1 | _adislocation density | |
| 610 | 1 | _avacancies | |
| 610 | 1 | _apositron annihilation spectroscopy | |
| 610 | 1 | _aникелид титана | |
| 610 | 1 | _aпозитронная спектроскопия | |
| 701 | 1 |
_aLotkov _bA. I. _gAleksandr Ivanovich |
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| 701 | 1 |
_aGrishkov _bV. N. _gViktor Nikolaevich |
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| 701 | 1 |
_aLaptev _bR. S. _cphysicist, specialist in the field of non-destructive testing _cAssociate Scientist of Tomsk Polytechnic University, Assistant, Candidate of Sciences _f1987- _gRoman Sergeevich _2stltpush _3(RuTPU)RU\TPU\pers\31884 |
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| 701 | 1 |
_aMironov _bYu. P. _gYury Petrovich |
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| 701 | 1 |
_aZhapova _bD. Yu. _gDorzhima Yurjevna |
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| 701 | 1 |
_aGirsova _bN. V. _gNataljya Vasiljevna |
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| 701 | 1 |
_aGusarenko _bA. A. _gAleksandr Aleksandrovich |
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| 701 | 1 |
_aBarmina _bE. G. _gElena Georgievna |
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| 701 | 1 |
_aKashina _bO. N. _gOlga Nikolaevna |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bИнженерная школа ядерных технологий _bОтделение экспериментальной физики _h7865 _2stltpush _3(RuTPU)RU\TPU\col\23549 |
| 801 | 2 |
_aRU _b63413507 _c20221026 _gRCR |
|
| 856 | 4 | _uhttp://earchive.tpu.ru/handle/11683/73242 | |
| 856 | 4 | _uhttps://doi.org/10.3390/ma15124298 | |
| 942 | _cCF | ||