نتایج جستجو برای: microstructural properties

تعداد نتایج: 879098  

2011
Maria V. Tzoumaki Thomas Moschakis Costas G. Biliaderis

Dispersions of colloidal particles in aqueous media are widely investigated because of their use in many industrial applications (foods, pharmaceuticals, cosmetics, paints, etc.). Acid-hydrolyzed chitin has been reported to spontaneously disperse into colloidal rod-like crystalline particles, which can form rigid structures. Such colloidal dispersions of acid-degraded chitin can undergo an isot...

Journal: :international journal of research in materials science 0
hossein yoozbashizadeh department of materials science and engineering, sharif university of technology, tehran, iran ali heidary moghadam department of materials science and engineering, tehran science and research branch, islamic azad university, tehran, iran valiollah dashtizad department of advanced materials and renewable energy, iranian research organization for science and technology, p.o. box13815-3538, tehran, iran ali kaflou department of advanced materials and renewable energy, iranian research organization for science and technology, p.o. box13815-3538, tehran, iran

the effect of rare earth (re) elements, including ce and la, on the sorption properties of zr-co getters was investigated in this work. the phase evolution, microstructural characteristics of getter powders were studied by means of x-ray diffraction method, scanning electron microscopy (sem) and energy dispersive x-ray spectroscopy (eds). the nanostructured zr3co intermetallic compound has been...

2003
David Basanta Peter J. Bentley Mark A. Miodownik Elizabeth A. Holm

The properties of engineering structures such as cars, cell phones or bridges rely on materials and on the properties of these materials. The study of these properties, which are determined by the internal architecture of the material or microstructure, has significant importance for material scientists. One of the things needed for this study is a tool that can create microstructural patterns....

2015
Francisco J. Baldenebro-Lopez Cynthia D. Gomez-Esparza Ramon Corral-Higuera Susana P. Arredondo-Rea Manuel J. Pellegrini-Cervantes Jose E. Ledezma-Sillas Roberto Martinez-Sanchez Jose M. Herrera-Ramirez

In this work, the mechanical properties and microstructural features of an AISI 304L stainless steel in two presentations, bulk and fibers, were systematically studied in order to establish the relationship among microstructure, mechanical properties, manufacturing process and effect on sample size. The microstructure was analyzed by XRD, SEM and TEM techniques. The strength, Young's modulus an...

Journal: :مهندسی متالورژی و مواد 0
محسن نصیریان بهمن میرزا خانی مصطفی منصوری نژاد

the flow stress of steel depends significantly on microstructural changes taken place during hot deformation processes. in hot deformation processes, the flow stress of steel is influenced by two main metallurgical phenomena, i.e. recovery and recrystallization, along with its chemical composition and thermo-mechanical parameters. the final mechanical properties of steel are also determined by ...

1998
W. J. Mills

The effect of microstructural variations on the fracture toughness of Alloy 718 was reviewed. The metallurgical parameters surveyed in this paper included heat treatment, heat-to-heat variations, product-form variations, neutron irradiation and long-term thermal aging. Key microstructural features and operative fracture mechanisms were related to macroscopic fracture toughness properties.

2004
David Basanta Mark A. Miodownik Peter J. Bentley Elizabeth A. Holm

The properties of engineering structures, such as robotic arms, aircrafts or bridges, rely on the properties of the materials used to build them. The internal architecture of the material or microstructure determines its properties and therefore, its study is of great interest for engineers and material scientists. Although there are tools that can provide 2D microstructural information, tools ...

Journal: :Journal of biomechanics 1992
K Choi S A Goldstein

The fatigue properties of trabecular bone tissue (single trabeculae) and similarly sized cortical bone specimens from human tibia were experimentally determined on a microstructural level using four-point bending cyclic tests, and they were compared based on modulus, mineral density, and microstructural characteristics. The results showed that trabecular specimens had significantly lower moduli...

2006
Sethuraman Sankaran Nicholas Zabaras

Multiscale computational methods bridging models at micro-scale with macro-properties is a problem of practical significance. Probability distribution functions (PDFs) providing a complete representation of microstructural variability in 3D polycrystalline materials using limited information is difficult to obtain since this inverse problem is highly ill-posed. We use the maximum entropy (MaxEn...

Mechanical properties of the alloys are a strong function of the average silicon particles size and the secondary dendrite arm spacing (SDAS). Modified Hall-Petch equation expresses the effects of these two microstructural parameters on the yield strength and ultimate tensile strength of the Al-Si based alloys. These microstructural parameters depen on parameters such as chemical composition, c...

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