نتایج جستجو برای: ageing heat treatment

تعداد نتایج: 1595727  

2013
Seung-Jun Lee Sung-Ha Park

Arterial ageing is characterized by age associated degeneration and sclerosis of the media layer of the large arteries. However, besides ageing, clinical conditions, which enhance oxidative stress and inflammation act to accelerate the degree of arterial ageing. In this review, we summarized the pathophysiology and contributing factors that accelerate arterial ageing. Among them, we focused on ...

Ardalan, Ali, Rasel, Mehri,

This article is focused on ageing and the rapid ageing population growth, from future health care costs prospectus. It reviews ageing population statistics in several courtiers as well as Iran, to illustrate the significance of the ageing population growth in the next decades. Nevertheless, the health care costs for elderly people are described and the considerable differences between health ca...

Mohammadi Zahrani, M., Shamanian, M.,

The fine grain structure of friction-stir welded aluminum alloys is unstable during post weld heat treatment and some grains abnormally grown. In this study, the sequence of abnormal grain growth during T6 heat treatment of Al-7075 friction-stir weld and its effect on mechanical properties of the weld was studied. The results showed that heat treatment in 510 ˚C resulted in drastic grain growth...

Journal: :Transactions of the Indian Institute of Metals 2022

In this work, the effect of ageing and retrogression on polarization resistance Al 6061 was assessed, in order to improve corrosion alloy with a negligible tensile strength. The behavior studied by exposing an simulated marine environment, then, current density (icorr) measured. obtained results were correlated strength (TS) reported elsewhere both measured, icorr TS modeled multiple linear reg...

Journal: :Crystals 2022

In this study, an artificial neural network approach and a regression model are adopted to predict the mechanical properties of heat-treated Mg-Zn-RE-Zr-Ca-Sr magnesium alloys. The dataset for (ANN) modeling is generated by investigating microhardness alloys using Vickers hardness tests. A back-propagation (BP) established experimental data that enable prediction as function composition heat tr...

2015
Maria Horne Nessa Thomas Andy Vail Rudd Selles Candy McCabe Sarah Tyson

BACKGROUND Fidelity to the treatment protocol is key to successful trials but often problematic. This article reports the staff's views on delivering a complex rehabilitation intervention: patient-led therapy during inpatient stroke care. METHODS An exploratory qualitative study using focus groups with staff involved in a multicenter (n = 12) feasibility trial of patient-led therapy (the MAES...

2011
A. VASHISTH

Temperature and relative humidity in combination cause rapid decline in seed quality during storage. To maintain the seed quality in storage a number of physical and chemical treatments are used. Magnetic field treatment is one such physical treatment practiced to improve the seed quality. An experiment was conducted to investigate the efficacy of this treatment to improve the storability of se...

Journal: :Acta Materialia 2021

The grain boundary (GB) microchemistry and precipitation behaviour in high-strength Al-Zn-Mg-Cu alloys has an important influence on their mechanical electrochemical properties. Simulation of the GB segregation, precipitation, solute distribution these requires accurate description thermodynamics kinetics this multi-component system. CALPHAD databases have been successfully developed for equili...

Journal: :Journal of Alloys and Compounds 2022

To understand Si precipitation and its influence on mechanical property improvement in high pressure die casting (HPDC) Al9Si3CuFe alloy under direct ageing heat treatment, the precipitates containing in-situ MgAl2O4 particles is analyzed via atomic-resolution scanning transmission electron microscopy. It shown that lath-like form an average size of 50 nm length, a good orientation relationship...

A. S. W. Kurny, M. S. Kaiser,

Microstructure and properties of the Al-6Si-0.3Mg alloys containing scandium (0.2 to 0.6wt %) were investigated. The microstructure was observed by optical microscopy, the hardness was determined by Vickers tester and phase transformation was investigated by differential scanning calorimetry (DSC) technique. The results showed that scandium can refine dendrites, enhance hardness in the aged all...

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