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Showing 1 to 20 of 77 for “"microstructural changes"”.
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Microstructural changes in plasma sprayed samarium cobalt permanent magnets.
Thesis. 1975. Sc.D.--Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.
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Thermophysical Properties and Microstructural Changes of Composite Materials at Elevated Temperature
… capacity, kinetic parameters, microstructure changes, porosity, and permeability. Specific heat and gravimetric data for kinetic parameters were measured with a simultaneous differential scanning calorimeter (DSC) / thermogravimetric analyzer (TGA). Experimental techniques were developed for …
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Microstructural changes and micronutrient bioaccessibility in soft-solid foods, using a model fresh cheese and in vitro digestion
Processed food products are complex matrices with many components interacting below 100 μm. These interactions will dictate the characteristics of product from a physical, chemical and nutritional point of view. The increasing demand for food products with health benefits and functional properties …
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Significance of Glaucoma Worldwide and in Bulgaria, Screening Possibilities, Early Detection and Analysis of Microstructural Changes /// Глаукомата – значим проблем в България и света, възможности за скрининг, ранно откриване и анализ на промените на микростуктурно ниво
Тази разработка е посветена на усилията да се намери оптимален алгоритъм за скрининг на пациентите в България. Изследвани и анализирани са възможностите за измерване на вътреочното налягане и оценка на диска на зрителния нерв, като рутинни масови методики, неизискващи високоспециализирана …
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Evaluation of linear and nonlinear vibration methods to characterize induced microstructural damage in portland cement-based materials
… thus to infer and to distinguish the resulting microstructural changes. The effect of internal moisture content on the vibration responses also was investigated. Linear (resonant frequency, half power bandwidth) and nonlinear (fast dynamics, slow dynamics) vibration measurements, using both …
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TEM-Untersuchungen zum Gefüge und zu mechanischen Spannungen in Metallisierungen für SAW-Bauelemente
… transport, called acoustomigration. These microstructural changes can destroy the characteristic of the SAW device. Different Al based material combinations were investigated by different authors to improve the reliability of the metallizations and to delay the cost-intensive change to Cu …
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Numerical simulation of recrystallization behaviour of A1-1Mg during multi-pass rolling
Microstructural changes which occur in aluminium alloys during rolling operations often play a large role in the performance of subsequent forming processes, such as deep-drawing and sheet-metal forming. It is becoming increasingly important to control these microstructural changes in order to …
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Structures and properties of lath martensite in rapidly solidified and conventionally processed iron-nickel-manganese-(titanium) maraging alloys
The microstructural changes, precipitation reactions and the mechanical properties of rapidly solidified and conventionally processed Fe-Ni-Mn-(Ti) martensitic alloys aged at 400-550$\sp\circ$C up to 600 hrs have been studied. Upon aging from 400 to 550$\sp\circ$C, the alloys showed classical …
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Novel Phenotyping of the Myocardium by Diffusion Tensor Cardiovascular Magnetic Resonance
… studies exist. This research aims to investigate microstructural changes in disease and assess the utility of DT-CMR as a novel phenotyping tool. Methods Biphasic DT-CMR was performed in controls and in patients with dilated cardiomyopathy (DCM), including recovered dilated cardiomyopathy (R-DCM) …
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Finite Element Modelling of Deep Zone Residual Stresses in Rolling Contact Bearing Elements.
… The evolved bearing material contains different microstructural features, termed as dark etching regions (DERs) and white etching bands (WEBs); visible after Nital etching. Intensive work has been carried out in the past few decades to define these microstructural changes along with mechanical …
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Hot forging of the nickel-base superalloy ATI 718Plus
… phase. This alloy is used for studying the microstructural changes due to recrystallisation and deformation occurring during forging. The body of work includes the testing and characterisation of 718Plus with and without $\eta$. High temperature compression tests were performed in the …
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Changes in 3 Dimensional Microstructures of Subchondral Cancellous Bone of Distal Femur in Early Osteoarthritis
… This study was designed to explore what changes occurs in subchondral cancellous bone in early osteoarthritis and find out the relation between cartilage damage and microstructural changes of cancellous bone. MATERIALS & METHODS: Total of 52 trabecular bone cores were obtained from 4 …
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Changes in material characteristics of AISI 430 stainless steel plates subjected to repeated blast loading
… loads. To accommodate the macro change there are microstructural changes that occur, i.e., grain morphology and shear banding. Most studies report on macroscopic response, i.e., large inelastic deformation and tearing of the structure, while limited studies have reported on microscopic changes …
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Deformation processed IMC-reinforced metal matrix composites
… average spacing of the IMC reinforcement. The microstructural features were correlated to observed mechanical behavior of the composites relative to the unreinforced matrix. The results indicate that the strengthening is derived from microstructural changes within the matrix due to the presence …
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Interrelationships of microstructure, stress and diffusion
… can be obtained separately. Moreover, additional microstructural information, as the crystallographic texture, the density of crystalline defects, such as dislocations, and the crystal size can be acquired from the collected XRD data. This thesis is dedicated to the investigation of …
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Effects of Laser Shock Peening on Residual Stress, Texture and Deformation Microstructure of Ti-6Al-4V Alloy
… generates deep compressive residual stresses and microstructural changes and thereby dramatically improves fatigue strength of critical metal aircraft engine parts. In the past, researchers have evaluated the mechanical effects of LSP experimentally through residual strain/stress measurements, …
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Chemomechanics of calcium leaching of cement-based materials at different scales : the role of CH-dissolution and C-S-H degradation on strength and durability performance of materials and structures
… materials. Starting from a three-level microstructural division of the heterogeneous microstructure of cement-based materials, a series of experimental and theoretical investigations is conducted leading to the development of a novel constitutive model and model-based simulations of the …
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DC magnetron reactive sputtering of low stress AlN piezoelectric thin films for MEMS application
… using response surface methodology indicated microstructural changes due to sputtered particle bombardment of the growing film surface. Surface morphology of the sputtered AIN films was assessed using tapping mode atomic force microscopy and scanning electron microscopy. Energetic particle …
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A constitutive model for the compression behavior of Old Alluvium
… at the meso-scale and causes physico-chemical changes at the micro-scale, which reveal the expansive characteristics of the clay minerals. It is difficult to achieve a fully disaggregated condition (through mechanical mixing or selective chemical dissolution) and hence, there is little …
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