Structural Defects in TiNi-Based Alloys after Warm ECAP
| Parent link: | Metals Vol. 10, iss. 9.— 2020.— [1154, 11p.] |
|---|---|
| Corporate Author: | |
| Other Authors: | , , , , |
| Summary: | Title screen The microstructure, martensitic transformations and crystal structure defects in the Ti50Ni47.3Fe2.7 (at%) alloy after equal-channel angular pressing (ECAP, angle 90°, route BC, 1–3 passes at T = 723 K) have been investigated. A homogeneous submicrocrystalline (SMC) structure (grains/subgrains about 300 nm) is observed after 3 ECAP passes. Crystal structure defects in the Ti49.4Ni50.6 (at%) alloy (8 ECAP passes, angle 120°, BC route, T = 723 K, grains/subgrains about 300 nm) and Ti50Ni47.3Fe2.7 (at%) alloy with SMC B2 structures after ECAP were studied by positron lifetime spectroscopy at the room temperature. The single component with the positron lifetime t1 = 132 ps and t1 = 140 ps were observed for positron lifetime spectra (PLS) obtained from ternary and binary, correspondingly, annealed alloys with coarse-grained structures. This t1 values correspond to the lifetime of delocalized positrons in defect-free B2 phase. The two component PLS were found for all samples exposed by ECAP. The component with t2 = 160 ps (annihilation of positrons trapped by dislocations) is observed for all samples after 1–8 ECAP passes. The component with t3 = 305 ps (annihilation of positrons trapped by vacancy nanoclusters) was detected only after the first ECAP pass. The component with t3 = 200 ps (annihilation of positrons trapped by vacancies in the Ti sublattice of B2 structure) is observed for all samples after 3–8 ECAP passes. |
| Published: |
2020
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| Subjects: | |
| Online Access: | http://earchive.tpu.ru/handle/11683/64780 https://doi.org/10.3390/met10091154 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662889 |
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| 200 | 1 | |a Structural Defects in TiNi-Based Alloys after Warm ECAP |f A. I. Lotkov, A. A. Baturin, V. I. Kopylov [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 55 tit.] | ||
| 330 | |a The microstructure, martensitic transformations and crystal structure defects in the Ti50Ni47.3Fe2.7 (at%) alloy after equal-channel angular pressing (ECAP, angle 90°, route BC, 1–3 passes at T = 723 K) have been investigated. A homogeneous submicrocrystalline (SMC) structure (grains/subgrains about 300 nm) is observed after 3 ECAP passes. Crystal structure defects in the Ti49.4Ni50.6 (at%) alloy (8 ECAP passes, angle 120°, BC route, T = 723 K, grains/subgrains about 300 nm) and Ti50Ni47.3Fe2.7 (at%) alloy with SMC B2 structures after ECAP were studied by positron lifetime spectroscopy at the room temperature. The single component with the positron lifetime t1 = 132 ps and t1 = 140 ps were observed for positron lifetime spectra (PLS) obtained from ternary and binary, correspondingly, annealed alloys with coarse-grained structures. This t1 values correspond to the lifetime of delocalized positrons in defect-free B2 phase. The two component PLS were found for all samples exposed by ECAP. The component with t2 = 160 ps (annihilation of positrons trapped by dislocations) is observed for all samples after 1–8 ECAP passes. The component with t3 = 305 ps (annihilation of positrons trapped by vacancy nanoclusters) was detected only after the first ECAP pass. The component with t3 = 200 ps (annihilation of positrons trapped by vacancies in the Ti sublattice of B2 structure) is observed for all samples after 3–8 ECAP passes. | ||
| 461 | |t Metals | ||
| 463 | |t Vol. 10, iss. 9 |v [1154, 11p.] |d 2020 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a TiNi-based alloys | |
| 610 | 1 | |a ECAP | |
| 610 | 1 | |a microstructure | |
| 610 | 1 | |a positron lifetime spectroscopy | |
| 610 | 1 | |a nanoclusters | |
| 610 | 1 | |a vacancies | |
| 610 | 1 | |a dislocations | |
| 701 | 1 | |a Lotkov |b A. I. |g Aleksandr Ivanovich | |
| 701 | 1 | |a Baturin |b A. A. |g Anatoly Anatoljevich | |
| 701 | 1 | |a Kopylov |b V. I. |g Vladimir Iljich | |
| 701 | 1 | |a Grishkov |b V. N. |g Viktor Nikolaevich | |
| 701 | 1 | |a Laptev |b R. S. |c physicist, specialist in the field of non-destructive testing |c Associate Professor of Tomsk Polytechnic University, Doctor of Technical Sciences |f 1987- |g Roman Sergeevich |y Tomsk |3 (RuTPU)RU\TPU\pers\31884 |9 15956 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа ядерных технологий |b Отделение экспериментальной физики |3 (RuTPU)RU\TPU\col\23549 |9 28346 |
| 801 | 2 | |a RU |b 63413507 |c 20210316 |g RCR | |
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| 856 | 4 | |u http://earchive.tpu.ru/handle/11683/64780 | |
| 856 | 4 | |u https://doi.org/10.3390/met10091154 | |
| 942 | |c CF | ||