نتایج جستجو برای: age hardening heat treatment
تعداد نتایج: 2201254 فیلتر نتایج به سال:
Although the immediate effects of temperature stress are well documented, the longer-term effects of such stresses are more poorly known. In these experiments, we investigate the effects of suboptimal and supraoptimal temperatures during pharate adult development on fecundity in the ̄esh ̄y, Sarcophaga crassipalpis Macquart. A 1 h cold shock at ±10°C during the red-eye pharate adult stage decre...
gd2o3 nanoparticles were prepared by a two–step process; cathodic electrodeposition followed by heat-treatment method. first, gd(oh)3 nanoparticles was galvanostatically deposited from nitrate bath on the steel substrate by pulse current (pc) mode. the deposition experiments was conducted at a typical on-time and off-time (ton=1ms and toff=1ms) for 60 min. the electrodeposited precursor was the...
age related macular degeneration (amd) is the most common cause of visual impairment in the population above 64 years of age in developed countries. most cases of severe vision loss due to amd are caused by exudative changes in the macula. extensive research on amd has led to advances in its prophylaxis and treatment in recent years. photodynamic therapy (pdt) was developed in late 1990's ...
the aim of this paper is to characterize welding of aisi 310 austenitic stainless steel to inconel 657 for use in oil-refining industries. the welds were produced using four types of filler materials; nickel-based alloys designated as inconel 82, a, 617, and 310 ss. the interfaces and heat-affected zones were characterized by optical and scanning electron microscopy. interfaces on the two sides...
The present study aims to investigate the residual stresses and surface hardening in ground components caused by the coupled effect of thermo-plasticity and phase transformation. A feasible numerical method was developed to accommodate appropriately the phase transformation in a workpiece experiencing critical temperature variation during grinding. The change of material properties was modelled...
Surveillance of Summer Mortality and Preparedness to Reduce the Health Impact of Heat Waves in Italy
Since 2004, the Italian Department for Civil Protection and the Ministry of Health have implemented a national program for the prevention of heat-health effects during summer, which to-date includes 34 major cities and 93% of the residents aged 65 years and over. The Italian program represents an important example of an integrated approach to prevent the impact of heat on health, comprising Hea...
ABSTRAK Aluminium merupakan logam yang paling banyak digunakan setelah baja, dengan karakteristik utamanya adalah ringan (berat jenis = 2.7 g/cm3), memiliki konduktivitas panas dan listrik tinggi, ketahanan korosi baik. Penggunaan aluminium menempati urutan kedua besi baja sebagai bahan untuk komponen industri otomotif, salah satu penggunaanya yaitu berupa pada mobil. seri 7075 mana sifat baik ...
We analyze the stability of homogeneous simple tensile/compressive deformations of an isotropic heat-conducting thermoviscoplastic bar by studying the growth of infinitesimal perturbations superimposed upon a homogeneous deformation. The smallest axial strain at which the superimposed perturbation has a positive initial growth rate is called the instability strain. Two criteria are used to dete...
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