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Лазерная обработка сплавов с памятью формы системы Ni-Ti

выпускная квалификационная работа бакалавра

Лазерная обработка сплавов с памятью формы системы Ni-Ti

Abstract

Данная работа посвящена изучению влияния лазерных технологий на свойства сплава с памятью формы системы NiTi, возможности и особенности их применения. Изучались описанные во многих научных работах процессы лазерной сварки NiTi c NiTi и NiTi с другими материалами, селективного лазерного плавления, прямого лазерного выращивания изделий из готового порошка NiTi и из сплавов, синтезированных из порошков в процессе производства изделия. Выводы о свойствах нитинола были сделаны на основе анализа микро-структур, фазовых превращений и результатов механических испытаний. Использование лазерной сварки для соединения деталей из NiTi позволяет добиться минимального теплового воздействия на материал и получить изделие требуемого качества с сохранением свойств нитинола. Применение лазерных аддитивных технологий позволяет получить качественные изделия сложной геометрии с сохранением эффекта памяти формы и псевдоупругости нитинола.

This work is devoted to the study of the influence of laser technologies on the properties of the alloy with shape memory of the NiTi system, the possibilities and features of their application. The processes of laser welding of NiTi with NiTi and NiTi with other materials described in many scientific papers, selective laser melting, direct laser deposi-tion of products from finished NiTi powder and alloys synthesized from individual powders during the manufacture of the product were studied. Conclusions about the properties of nitinol were made on the basis of the analysis of micro-structures, phase transformations and the results of mechanical tests. The use of laser welding to join parts made of NiTi allows to achieve minimal thermal effect on the material and to obtain a product of the required quality while maintaining the properties of nitinol. The use of laser additive technologies allows to obtain high-quality products of complex geometry while maintaining the shape memory effect and pseudoelas-ticity of nitinol.

Keywords

pseudo-elasticity, лазерная сварка, direct laser deposition, нитинол, эффект памяти формы, селективное лазерное плавление, nitinol, прямое лазерное выращивание, selective laser melting, laser welding, псевдоупругость, аустентиная В2-фаза, austenitic B2-phase, shape memory effect

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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