The Influence of Ultrasonic Activation on Microstructure, Phase Transformation and Mechanical Properties of Porous Ni-Ti Shape Memory Alloys via Self-Propagating High-Temperature Synthesis

被引：2

作者：

Maashaa, Dovchinvanchig ^{[1
]}

Purevdagva, Enkhtsetseg ^{[1
]}

Rubanik, Vasili V. ^{[2
]}

Rubanik Jr, Vasili V.

机构：

[1] Mongolian Univ Life Sci, Sch Appl Sci, Dept Phys & Math, Ulaanbaatar 17024, Mongolia

[2] Natl Acad Sci Belarus, Inst Tech Acoust, Vitebsk 210009, BELARUS

来源：

MATERIALS | 2023年 / 16卷 / 18期

关键词：

porous Ni-Ti SMA; microstructure; mechanical properties; phase transformation; PREHEATING TEMPERATURE; IMPLANTS; BEHAVIOR;

D O I：

10.3390/ma16186134

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：

Porous Ni-Ti shape memory alloys (SMAs) have been widely studied in biomedical and engineering applications. Porous Ni-Ti SMAs were obtained via self-propagating high-temperature synthesis (SHS), and their microstructure, phase transformation, and mechanical properties were investigated. This article presents the results of a study of changes in the microstructure, phase transformation, and mechanical properties of porous Ni-Ti SMAs when Ni and Ti metal powders were preliminarily subjected to ultrasonic activation at various periods. It was determined that the porosity of the obtained alloy samples was 62-68 vol%. The microstructure was composed of the main matrix Ni-Ti phase and the accompanying Ti and Ti2-Ni phases. The results show that the hardness 34.1-86.8 HB and elastic modulus 4.2-10.8 GPa increased with an increase in the ultrasonic activation time of the samples. The phase transformation temperature of the Ni-Ti shape memory alloy remained almost unchanged under the influence of ultrasonic treatment.

引用

页数：9

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