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Influence of beam current on microstructure of electron beam melted Ti-6Al-4V alloy

Progress in Natural Science:Materials International 2019年第4期29卷 440-446页

作者： Roman Laptev Natalia Pushilina Egor Kashkarov Maxim Syrtanov Ekaterina Stepanova andrey koptyug andrey Lider National Research Tomsk Polytechnic University Mid Sweden University

The defect microstructure of the samples manufactured from Ti-6A1-4V powder was studied using electron beam melting(EBM) in the beam current range of 17-13 *** hybrid digital complex combined positron lifetime spectroscopy and coincidence Doppler broadening spectroscopy was used to characterize the defect structure of the *** microstructure and defects were also analyzed by transmission electron *** has been established that the main type of the defects in the EBM manufactured samples is *** to the conducted measurements and calculations,the dislocation density in the EBM manufactured samples exceeds by two orders the similar value for the cast Ti-6Al-4 *** of Ti-Ti-Al nanoscale clusters has been found in the EBM manufactured samples.

关键词： Titanium alloy Additive technology Electron beam melting Positron spectroscopy Defects Transmission electron microscopy

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Functional Conjugation of the Different Regulatory Responses to the Stress Stimuli in Healthy Human Subjects

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Open Journal of Applied Sciences 2016年第8期6卷 489-500页

作者： Yurij G. Sukhovey andrey V. koptyug Tatjana A. Fisher Sergey A. Petrov Evgenij L. Dotsenko Institute of Clinical Immunology Siberian Division of Russian Academy of Sciences Tyumen Russia Sports Tech Research Centre Mid Sweden University &Ouml stersund Sweden Tyumen Research Centre Siberian Division of Russian Academy of Sciences Tyumen Russia Tyumen State Oil and Gas Institute Tyumen Russia Tyumen State University Tyumen Russia

Present article discusses the physiological mechanisms of the state employees adaptation during active training in temporary groups. It is suggested that adaptive mechanisms to adverse effects may be studied basing on the concept of functional isomorphism of the psychic and immune systems. Adaptive mechanisms were studied through the monitoring of the stress factors’ impact upon the law enforcement officers when training outside the places of permanent deployment. The specific purpose of present study was to evaluate the physiological indicators of the psychic, immune and endocrine systems dynamics at different stages of adaptation of the live organism to a stressful situation, hoping to get better insight into possible relations between psychic and immune domains. Through monitoring of the dynamics of the endocrine and immune responses to the psychic stimuli, it was possible to correlate the stages of the stress onset to the phases of specific immune reactions. Strong correlations between the parameters characterizing activation of the psychic and immune responses support the hypothesis of the presence of “strong cooperation” between psychic and immune domains. It supports earlier hypothesis that we are monitoring different manifestations of the functioning of a complex inseparable psycho-immune meta-system.

关键词： Stress Immune and Psychic Domains Endocrine System Immune Response Stages Functional

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