The mechanisms of stress-induced transformation in ultimately fine-grained titanium nickelide, and critical grain size for this transformation

被引：15

作者：

Dubinskiy, Sergey ^{[1
]}

Prokoshkin, Sergey ^{[1
]}

Sheremetyev, Vadim ^{[1
]}

Konopatsky, Anton ^{[1
]}

Korotitskiy, Andrey ^{[1
]}

Tabachkova, Natalia ^{[1
,2
]}

Blinova, Elena ^{[3
]}

Glezer, Alexander ^{[1
]}

Brailovski, Vladimir ^{[4
]}

机构：

[1] Natl Univ Sci & Technol MISIS, 4 Leninskiy Prosp, Moscow 119049, Russia

[2] Russian Acad Sci, Prokhorov Gen Phys Inst, 38 Vavilov Str, Moscow 119991, Russia

[3] Kurdyumov Inst Met Sci & Met Phys, 9-23 2nd Baumanskaya Str, Moscow 107005, Russia

[4] Ecole Technol Super, 1100 Notre Dame St West, Montreal, PQ H3C 1K3, Canada

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 858卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Metals and alloys; Nanostructured materials; Phase transitions; Shape memory; Transmission electron microscopy; TEM; X-ray diffraction;

D O I：

10.1016/j.jallcom.2020.157733

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The mechanisms of stress-induced transformation in ultimately fine-grained Ti-50.61 at.%Ni shape memory alloy subjected to severe cold rolling and short-term post-deformation annealing were studied using transmission electron microscopy and in situ X ray diffractometry. An unambiguous evidence of a discrete mechanism of stress-induced B2 -> B19' transformation in nanograined Ti-Ni alloys with an average grain size down to 2.3 +/- 0.2 nm was obtained (this grain size is considered to be the smallest ever obtained for the severe plastic deformation processing route). No signs of continuous transformational lattice changes were found. It has been shown that the critical austenite grain size for the stress-induced transformation exists, and it amounts to similar to 4.5 nm in the case of room-temperature tensile straining and further cold plastic rolling. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：9

共 45 条

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