Features of the mechanical behavior of ultrafine-grained and nanostructured TiNi alloys

被引：18

作者：

Gunderov, Dmitry ^{[1
,2
,3
]}

Churakova, Anna ^{[1
,2
,3
]}

Lukyanov, Aleksandr ^{[1
,4
]}

Prokofiev, Egor ^{[1
,3
]}

Pushin, Vladimir ^{[4
]}

Kreitcberg, Alena ^{[5
]}

Prokoshkin, Sergey ^{[5
]}

机构：

[1] Ufa State Aviat Tech Univ, K Marks 12, Ufa 450000, Russia

[2] RAS, Inst Mol & Crystal Phys, Prospekt Oktyabrya 151, Ufa 450075, Russia

[3] St Petersburg State Univ, Univ Skiy Pr 7-9, St Petersburg 198504, Russia

[4] RAS, Inst Phys Met UB, S Kovalevskaya, Ekaterinburg 620990, Russia

[5] Natl Univ Sci & Technol MISIS, Leninsky Prospect 4, Moscow 119991, Russia

来源：

MATERIALS TODAY-PROCEEDINGS | 2017年 / 4卷 / 03期

关键词：

TiNi-alloys; SPD; nanostructure; strength; plasticity; SEVERE PLASTIC-DEFORMATION; HIGH-PRESSURE TORSION; TRANSFORMATIONS; TI49.4NI50.6;

D O I：

10.1016/j.matpr.2017.04.078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The article presents the results of the study on the mechanical behavior of ultrafine-grained (UFG) and nanocrystalline (NC) TiNi alloys produced by severe plastic deformation (SPD), using the techniques of high pressure torsion (HPT) and annealing. The features of the microstructure and deformation behavior of the NC and UFG alloy have been studied. The amorphous and NC TiNi alloy exhibits enhanced strength. Variation of the post-deformation annealing temperature of the HPT-processed samples can be used for the formation of a structure with various grain sizes and different levels of strength and ductility. Although under deformation the alloy passes to the martensitic state, the dependence of yield stress of TiNi on grain size D in the range of 30 mu m to 20 nm (HPT + annealing at 400 degrees C) corresponds to the Hall-Petch relation, and yield stress is determined by the size of the austenite grain. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：4825 / 4829

页数：5

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