نتایج جستجو برای: microstructural aspects
تعداد نتایج: 368024 فیلتر نتایج به سال:
In this study, a magnetic-sensitive microcapsule was prepared using Fe 3O 4/poly(allylamine) (Fe 3O 4/PAH) polyelectrolyte to construct the shell. Structural integrity, microstructural evolution, and corresponding release behaviors of fluorescence dyes and doxorubicin were systematically investigated. Experimental observations showed that the presence of the magnetic nanoparticles in the shell ...
In the present investigation, effect and role of plasma gas flow rate on formation microstructure during arc welding Ti6Al4V titanium alloy were studied using microscopic observation, energy dispersive spectroscopic analysis, tensile tests microhardness measurements. Plasma influences pressure, constriction, stability. The transformation from conduction mode to keyhole causes severe changes mic...
of the Dissertation Microstructural Feature-based Processing and Analysis of Diffusion Tensor MRI
this study attempts to investigate the effect of peers’ revision in comparison to that of the teacher, and whether peers’ comments and teachers’ comments facilitate students’ revision? if yes, which one is more effective? also attempts have been made to see which aspects of language are more highlighted by peers versus teachers when commenting. besides, it is investigating the student’s attitud...
در این پژوهش، به بررسی تأثیر هندسهی طرح اتصال بر جنبههای ریزساختاری و سازوکار خوردگی فلز جوش در اتصالات جوشکاری فولاد هادفیلد پرداخته شده است. برای این منظور، ابتدا چهار عدد ورق آستنیته شده به ضخامت mm2 از فولاد هادفیلد تهیه شد. سپس، طرح اتصال با دو پخ V و X شکل تهیه گردید و برای جوشکاری آنها از فرآیند SMAW استفاده شد. در مرحله بعد، از روشهای پلاریزاسیون پتانسیودینامیک و طیفسنجی امپدانس الک...
Two nondestructive electromagnetic/magnetic techniques including hysteresis loop and eddy current methodologies have been used to characterize microstructural changes of AISI D2 cold work tool steel as a result of quench and tempering treatments. To measure the fraction retained austenite in quenched microstructure, six specimens were austenitized in the range of 1000-1130 °C. Samples austenit...
Since the bulk properties such as mechanical and functional properties of polycrystalline materials are strongly affected by microstructure, the control and optimization of the microstructure are essential to obtain desirable properties and to develop high performance polycrystalline materials. The application of external fields such as stress, electric and magnetic fields have been noticed as ...
*Member of ASM International arburizing has been a popular method for obtaining a unique balance of properties in steels for many years. Steels with low carbon contents are characterized by good toughness and good ductility, but low strength and low wear resistance. By locally increasing the carbon content at the surface, followed by heat treatment to produce a very high hardness in this layer ...
We consider the problem of microstructural evolution in binary alloys in two dimensions. The microstructure consists of arbitrarily shaped precipitates embedded in a matrix. Both the precipitates and the matrix are taken to be elastically anisotropic, with different elastic constants. The interfacial energy at the precipitate– matrix interfaces is also taken to be anisotropic. This is an extens...
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