نتایج جستجو برای: stir casting
تعداد نتایج: 19300 فیلتر نتایج به سال:
BACKGROUND Magnetic resonance imaging (MRI) is highly useful for detecting diseases of the bone marrow. The sensitivity for detecting compression fracture is very high, but specificity is low for differential diagnosis between malignant and benign cases. PURPOSE To evaluate the usefulness of in-phase/opposed-phase and short TI inversion recovery (STIR) magnetic resonance imaging (MRI) of bone...
BACKGROUND Facioscapulohumeral muscular dystrophy (FSHD) is one of the most common muscular dystrophies and is characterized by a non-conventional genetic mechanism activated by pathogenic D4Z4 repeat contractions. By muscle Magnetic Resonance Imaging (MRI) we observed that T2-short tau inversion recovery (T2-STIR) sequences identify two different conditions in which each muscle can be found be...
BACKGROUND AND PURPOSE Improving the sensitivity of MR imaging for the detection of multiple sclerosis (MS) lesions in the cord might be useful in the diagnostic workup and could lead to a better understanding of the evolution of the disease. The purpose of this study was to compare fast spin-echo (FSE) with magnetization transfer-prepared gradient-echo (MT-GE) and fast short-inversion-time inv...
The synthesis of agro-waste reinforced metal matrix composites is now very common among researchers because their cost effectiveness, excellent properties and wide industrial applications. This study synthesized a hybrid aluminium 6061 composite with particulates silicon carbide, SiCp carbonized coconut shell, CCSP as reinforcement combined in the ratio 1:1, determined effect combining CCSp rei...
The microstructure and residual stresses of an AA6040 Al to AZ31B Mg friction stir weld are studied using scanning electron microscopy and X-ray diffraction. The complex material flow promoted by the friction stir welding process results in a fine grained structure in the stir zone of both materials due to dynamic/recovery recrystallization. The interface between the materials is characterized ...
Friction stir welding is a solid state joining process. High strength aluminum alloys are widely used in aircraft and marine industries. Generally, the mechanical properties of fusion welded aluminum joints are poor. As friction stir welding occurs in solid state, no solidification structures are created thereby eliminating the brittle and eutectic phases common in fusion welding of high streng...
Stir-frying is a cooking method, originating from Asia, in which food is fried in small amount of very hot oil. Nowadays in many other parts of the world stir-frying is a very popular method to prepare vegetables, because it is fast and fried vegetables are tasty. However, the retention of phytochemicals like the health-beneficial glucosinolates in Brassica vegetables is less explored for stir-...
Introduction Acute myocardial infarcts (AMI) are typically discriminated with T2-weighted short TI inversion recovery (STIR) with turbo spin echo (TSE) readouts [1], albeit with limited specificity [2]. Guided by the association that T2-STIR images identify AMI territories on the basis of edema-related T2 changes, even some of the recently proposed improvements [2,3] have relied on preferential...
Abstract The major problem confronting aluminium alloy in various fields of engineering is based on the structural and continual failure a component service. difficulties encountered are resolved through addition RHA as strengthening agent to metal matrix composite. fabrication MMC (AA6061/RHA) using metallurgical stir casting route array 2, 4, 6 8 wt. % was done. Polarization test carried out ...
Dual step stir casting method was utilized to develop Al6061 composite reinforced with SiC (micron) and Si3N4 (submicron) particles in varying proportion weight percentage. A homogeneous uniform distribution of hybrid reinforcement without significant porosity observed the microstructure composites. X-ray diffraction (XRD) results manifest that are thermodynamically stable during processing no ...
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