| 000 | 03304nab a2200397 c 4500 | ||
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| 001 | vtls000653439 | ||
| 003 | RU-ToGU | ||
| 005 | 20230123160649.0 | ||
| 007 | cr | | ||
| 008 | 190507|2018 ne s a eng d | ||
| 024 | 7 |
_a10.1016/j.actamat.2017.11.026 _2doi |
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| 035 | _ato000653439 | ||
| 040 |
_aRU-ToGU _brus _cRU-ToGU |
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| 245 | 1 | 0 |
_aIn situ, 3D characterization of the deformation mechanics of a superelastic NiTi shape memory alloy single crystal under multiscale constraint _cH. M. Paranjape, P. P. Paul, B. Amin-Ahmadi [et al.] |
| 504 | _aБиблиогр.: 64 назв. | ||
| 520 | 3 | _aMicrostructural elements in NiTi shape memory alloys (SMAs) e precipitates, phase boundaries, inclusions, grain boundaries e can be viewed as sources of multiscale constraint that influence their deformation response. We characterized in situ, and in 3D, the deformation and the evolution of microstructure during a tension test in a superelastic NiTi specimen containing some of these sources of constraint. The method used was far-field high-energy X-ray diffraction microscopy (ff-HEDM), complemented by electron microscopy. We simulated the local stress state in the specimen using a microstructural model informed by the experimental data. Using these combined microstructure, deformation, and stress data, we report three phenomena, and relate them to specific sources of constraint. During initial elastic loading, axial lattice strain in austenite increased monotonically. On partial stress-induced phase transformation to martensite, the stress redistributed to both phases leading to a stress relaxation in austenite. The specimen contained a dense distribution of inclusions, which led to the activation of martensite habit plane variants that produce less than theoretical maximum transformation strain. Large Ni4Ti3 precipitates potentially contributed to the poor transformation response. Under load, proportional gradients in local rotation and elastic stretch developed in the martensite phase, because of the constraint at phase interfaces. This combined ff-HEDM, electron microscopy, microstructural simulation toolbox provides a versatile method to understand the effect of constraint on inelastic deformation in other alloys with hierarchical microstructure | |
| 653 | _aфазовые превращения | ||
| 653 | _aсплавы с памятью формы | ||
| 653 | _aмикроструктурные элементы | ||
| 653 | _aграницы зерен | ||
| 655 | 4 |
_aстатьи в журналах _9745982 |
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| 700 | 1 |
_aPaul, Partha P. _9495096 |
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| 700 | 1 |
_aAmin-Ahmadi, Behnam _9495097 |
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| 700 | 1 |
_aSharma, Hemant _9495098 |
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| 700 | 1 |
_aDale, Darren _9495099 |
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| 700 | 1 |
_aKo, Jun Young Peter _9495100 |
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| 700 | 1 |
_aChumlyakov, Yuri I. _9100866 |
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| 700 | 1 |
_aBrinson, L. Catherine _9308906 |
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| 700 | 1 |
_aStebner, Aaron Paul _9409378 |
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| 700 | 1 |
_aParanjape, Harshad M. _9495101 |
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| 773 | 0 |
_tActa materialia _d2018 _gVol. 144. P. 748-757 _x1359-6454 |
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| 852 | 4 | _aRU-ToGU | |
| 856 | 4 | _uhttp://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000653439 | |
| 908 | _aстатья | ||
| 999 | _c454435 | ||