Influence of Grain Size and Contact Temperature on the Tribological Behaviour of Shape Memory Ti49.3Ni50.7 Alloy

Misochenko, A. A.; Chertovskikh, S. V.; Шустер, Л. Ш.; Stolyarov, V. V.

doi:10.1007/s11249-017-0917-6

Cited by 16 publications

(9 citation statements)

References 11 publications

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“…The transition of the dominant deformation mechanisms from dislocation to grain boundary-mediated plasticity with decreasing grain sizes in polycrystalline metals also plays a role in their frictional behavior. While reports indicate that coefficients of friction generally become lower as crystal grains are made smaller [18][19][20][21][22], the applied load [20], sliding speed [23], and lubrication condition [24] in a specific system may complicate the correlation between friction and grain size. There is also a report showing that nanocrystalline and coarse-grained copper have comparable coefficients of friction [25].…”

Section: Introductionmentioning

confidence: 99%

Atomic Origins of Friction Reduction in Metal Alloys

Cheng

Chandross

2021

Tribol Lett

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We present the results of large scale molecular dynamics simulations aimed at understanding the origins of high friction coefficients in pure metals, and their concomitant reduction in alloys and composites. We utilize a series of targeted simulations to demonstrate that different slip mechanisms are active in the two systems, leading to differing frictional behavior. Specifically, we show that in pure metals, sliding occurs along the crystallographic slip planes, whereas in alloys shear is accommodated by grain boundaries. In pure metals, there is significant grain growth induced by the applied shear stress and the slip planes are commensurate contacts with high friction. However, the presence of dissimilar atoms in alloys suppresses grain growth and stabilizes grain boundaries, leading to low friction via grain boundary sliding.

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Section: Introductionmentioning

confidence: 99%

Atomic Origins of Friction Reduction in Metal Alloys

Cheng

Chandross

2021

Tribol Lett

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“…In [ 45 ], the authors note a decrease in the friction coefficient under the action of current pulses during deformation by bending of the Ti-6Al-4V alloy. In study [ 74 ], a decrease in the adhesion (molecular) component of the friction coefficient, as well as a reduction in gripping during the friction of the TiNi shape-memory alloy after rolling with current, was noted. However, the role of current in this paper is not obvious and the results are related to the structure refinement.…”

Section: Physical–mechanical and Technological Propertiesmentioning

confidence: 99%

A Pulsed Current Application to the Deformation Processing of Materials

Stolyarov,

Misochenko

2023

Materials

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A review of studies on the electroplastic effect on the deformation process in various conductive materials and alloys for the last decade has been carried out. Aspects, such as the mode and regimes of electric current, the practical methods of its introduction into materials with different deformation schemes, features of deformation behavior accompanied by a pulsed current of different materials, structural changes caused by the combined action of deformation and current, the influence of structural features on the electroplastic effect, changes in the physical, mechanical, and technological properties of materials subjected to plastic deformation under current, possible mechanisms and methods of physical and computer modeling of the electroplastic effect, and potential and practical applications of the electroplastic effect are considered. The growing research interest in the manifestation of the electroplastic effect in such new modern materials as shape-memory alloys and ultrafine-grained and nanostructured alloys is shown. Various methods of modeling the mechanisms of electroplasticity, especially at the microlevel, are becoming the most realistic approach for the prediction of the deformation behavior and physical and mechanical properties of various materials. Original examples of the practical application of electropulse methods in the processes of drawing, microstamping, and others are given.

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“…Как пример более сложных объектов, рассмотрены сплавы на основе титана (интерметаллидное соединение с памятью формы TiNi и двухфазный сплав Ti Al V  . Поскольку известно, что измельчение структуры приводит к упрочнению металлических материалов, как в объеме, так и на поверхности, то особое внимание сфокусировано на влиянии размера зерен в широком диапазоне, как одного из наиболее важных структурных параметров [4,5,6]. При этом акцент сделан на сравнение материалов с Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов.…”

Section: Introductionunclassified

Трибологические Аспекты Наноструктурных Материалов

Столяров

2023

Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials

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Статья посвящена обзору структурных факторов, влияющих на трибологическое поведение без смазки наноструктурных металлов и сплавов. Научное значение данной темы связано с пониманием механизмов износа и возможностью его прогнозирования при длительной эксплуатации. Особое внимание сфокусировано на влиянии размера зерен в интервале 0,01-10 мкм, как одного из наиболее важных структурных параметров. Сделан акцент на ультрамелкозернистые материалы, полученные интенсивной пластической деформации, и нанокристаллические материалы, полученные не деформационными методами напыления и осаждения. Показано, что нанокристаллические пленки на поверхности контакта являются более предпочтительными для повышения износостойкости, поскольку более устойчивы к структурно-фазовым превращениям в процессе трения. Среди чистых металлов, как объектов без фазовых превращений, рассматриваются медь, никель, алюминий и титан. Как пример более сложных объектов, представлены сплавы на основе титана (интерметаллидное соединение с памятью формы TiNi и двухфазный сплав Ti-Al-V). Кроме классической схемы трения при макроперемещении индентора на контактной поверхности, рассматривается фреттинг-трение при микроперемещении.

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Influence of Grain Size and Contact Temperature on the Tribological Behaviour of Shape Memory Ti49.3Ni50.7 Alloy

Cited by 16 publications

References 11 publications

Atomic Origins of Friction Reduction in Metal Alloys

Atomic Origins of Friction Reduction in Metal Alloys

A Pulsed Current Application to the Deformation Processing of Materials

Трибологические Аспекты Наноструктурных Материалов

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