Phase Transformations and Mechanical Properties of Two-Component Titanium Alloys after Heat Treatment in the Two-Phase Region (α plus Intermetallic Compound) and High-Pressure Torsion

被引：4
作者：
Gornakova, A. S. [1 ]
Straumal, B. B. [1 ,2 ]
Golovin, Yu. I. [3 ]
Afonikova, N. S. [1 ]
Pirozhkova, T. S. [3 ]
Tyurin, A. I. [3 ]
机构：
[1] Russian Acad Sci, Osipyan Inst Solid State Phys, Chernogolovka 142432, Moscow Oblast, Russia
[2] Russian Acad Sci, Chernogolovka Sci Ctr, Chernogolovka 142432, Moscow Oblast, Russia
[3] Derzhavin Tambov State Univ, Res Inst Nanotechnol & Nanomat, Tambov 392000, Russia
来源：
JOURNAL OF SURFACE INVESTIGATION | 2021年 / 15卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
titanium alloys; intermetallic compounds; high-pressure torsion; nanoindentation; Young's modulus; nanohardness; heat-treatment mode; HARDNESS;
D O I：
10.1134/S1027451021060082
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In this paper, we measure the nanohardness (H) and Young's modulus (E) of three alloys: Ti-2.5 wt % Ni, Ti-2 wt % Cr, and Ti-2.2 wt % Fe preliminarily annealed in the two-phase region of the phase diagram (alpha Ti + intermetallic compound) and then subjected to high-pressure torsion. The titanium alloy with the nickel addition showed the highest H and E values, they vary uniformly from the center to the edge of the sample, and the alloy after high-pressure torsion contains two phases: alpha and omega. The nanohardness of the alloy Ti-2.5 wt % Ni along the sample radius over the surface changes insignificantly: from minimal 4.8 to maximal 5.2 GPa, as does Young's modulus (from 121 to 155 GPa). The maxima of the H and E values fall in the middle of the sample radius. The alloy Ti-2.2 wt % Fe behaves differently: the presence of four phases alpha, beta, omega, and TiFe leads to a strong scatter in the measured H and E values: from 4.4 to 2.0 GPa and from 131 to 12 GPa, respectively. Processing the P-h diagrams allows the nanohardness of the material to be related to its creep behaviour.
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收藏
页码：1154 / 1158
页数：5
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