نتایج جستجو برای: and wc)
تعداد نتایج: 16828268 فیلتر نتایج به سال:
This study investigates the effect of carbide particle size on the microstructure, mechanical properties, and abrasive wear resistance of WC-17%Co HVOF-sprayed coatings. The characteristics of WC-1, WC-2, and WC-3 coatings with carbide sizes of 1 µm, 0.9 µm, and 0.5 µm, respectively, were also investigated. WC-1 coating experienced the maximum carbon loss of 42%, while WC-2 and WC-3 coatings un...
به منظور ارزیابی عملکرد و پایداری عملکرد 20 ژنوتیپ گندم نان، آزمایشی در سه سال متوالی(92-90) در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه رازی کرمانشاه در دو سایت دیم و آبی در قالب طرح بلوک های کامل تصادفی در سه تکرار اجرا گردید. بر اساس نتایج تجزیه واریانس مرکب صفات عملکرد دانه، تعداد دانه در سنبله، تعداد سنبله در متر مربع و وزن هزار دانه در سطح احتمال 1% اختلاف معنی داری را نشان دادند. با استفاد...
در این پژوهش رفتار سایشی کامپوزیت های تجاری wc-10wt%co (h10f)، wc-40vol%co و کامپوزیت های wc-40vol%feal-b با مقادیر مختلف بور از صفر تا ppm1000 به روش پین روی دیسک بررسی شد. آزمون های سایش در دمای محیط، تحت بار 40 نیوتن و طی مسافت 100 متر انجام شدند. سطوح سایش به وسیله میکروسکوپ الکترونی روبشی (sem) مورد بررسی قرار گرفت. نتایج نشان داد که در بین نمونه ها، کامپوزیت wc-40vol%feal بدون بور کمترین ...
In this research, the wear behavior of commercial grades of WC-10wt%Co (H10F), WC-40vol%Co and WC-40vol%FeAl-B composites with different amounts of boron from zero to 1000 ppm has been investigated by the pin on disk test method at high temperature. The wear tests were done under load of 40 N, a distance of 100 m and at ambient temperature, 200 ̊C and 300 ̊C. Wear surfaces were examine...
The metallurgical and mechanical properties of Ti6Al4V/(WC-Co) friction welds have ben investigated. The microstructure close to the bondline comprised a mixture of acicular and equiaxed α plus β phases. The diffusion of elements in the welded specimens has been detected. The fracture strengths of Ti6Al4V/(WC-Co) friction welds markedly improved when the cobalt content in the (WC-Co) carbide su...
The metallurgical and mechanical properties of Ti6Al4V/(WC-Co) friction welds have ben investigated. The microstructure close to the bondline comprised a mixture of acicular and equiaxed α plus β phases. The diffusion of elements in the welded specimens has been detected. The fracture strengths of Ti6Al4V/(WC-Co) friction welds markedly improved when the cobalt content in the (WC-Co) carbide su...
background: waist circumference (wc) is an accurate and simple measure of abdominal obesity as compared to waist–hip ratio (whr). the aim of this study was to determine the correlation between body mass index (bmi) with wc and whr and suggest cutoff points for wc among rural malaysian adults. methods: a cross‑sectional study was conducted among 669 respondents from three villages in tanjung kar...
introduction: evaluating body fat distribution is done through various methods. however, waist circumference(wc) measurement is a simple, cheap and valuable way. today a close consideration is given to wc assessment in order to evaluate physical health in epidemiological studies. wc depends on various environmental factors. identifying these factors can be used in health programs to promote wom...
currently, obesity has become a worldwide health problem and yet little is known about the impact of changes in obesity indicator on incident hypertension. the aim of this study was to compare the impact of changes in the wc and bmi on incident hypertension in a cohort population.after a baseline investigation, we conducted the first and the second follow-up assessments for subjects after 2 and...
An experiment was conducted to investigate the effects of hydro alcoholic extract of Withania coagulans (WC ) and 1, 25-dihydroxycholecalciferol on performance and bone strength of male broiler chickens. Diets were arranged factorially (2×3×2) consisted of a positive control with adequate Ca (10.4 g/kg diet) and nonphytate P (NPP 5 g/kg diet) exceed the requirements suggested in the Ross 308 ...
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