Study of the Evolution of the Structure and Kinetics of Martensitic Transformations in a Titanium Nickelide upon Isothermal Annealing after Hot Helical Rolling

被引：19
作者：
Kolobova, A. Yu. [1 ]
Ryklina, E. P. [1 ]
Prokoshkin, S. D. [1 ]
Inaekyan, K. E. [2 ]
Brailovskii, V. [2 ]
机构：
[1] Natl Univ Sci & Technol MISiS, Leninskii Pr 4, Moscow 119049, Russia
[2] Ecole Technol Super, 1100 Notre Dame Str West, Montreal, PQ H3C 1K3, Canada
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2018年 / 119卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
shape-memory alloys; titanium nickelide; microstructure; phase transformations; differential scanning calorimetry; functional properties; PLASTIC-DEFORMATION; HEAT-TREATMENT; GRAIN-SIZE; MEMORY; PRECIPITATION; PHASE; MICROSTRUCTURE; NANOSTRUCTURES; MODERATE;
D O I：
10.1134/S0031918X17120079
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Differential scanning calorimetry has been used to study the effect of the temperature and holding time upon isothermal annealing on the calorimetric effects of the martensitic transformations (MTs) of an aging Ti-50.7 at % Ni alloy produced by hot helical rolling at a temperature of 850-900A degrees D<inverted exclamation> with subsequent cooling in air. The sequence of the phase transitions upon reverse MT has been determined using X-ray diffractometry. The regularities of the evolution of the characteristic temperatures of martensitic transformations after annealing at temperatures of 400, 430, and 450A degrees D<inverted exclamation> for 1-10 h have been analyzed. The results of electron-microscopic studies of the structure of the alloy in the initial state and after annealing have been presented; the features of the morphology of the Ti3Ni4 phase precipitated upon aging have been analyzed. Based on the results of calorimetric and structural studies, the temperature of the highest intensity of the aging processes has been determined.
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页码：134 / 145
页数：12
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