نتایج جستجو برای: microstructure

تعداد نتایج: 40248  

2016

This article presents the mechanical properties and microstructure of titanium alloy after selective laser melting (SLM). Titanium alloys are ideal material for selective laser melting (SLM), because they are expensive and difficult to machinery using traditional technologies. The application of SLM in the biomedical area has been slow due to the stringent performance criteria and concerns rela...

2004
D. Pate Y. V. Murty

A variety of cast pyrometR 718 alloy microstructures result from processing of different diameters of industrial scale ingots for producing superalloy forgings used in aircraft turbine engine applications. The hot workability of these cast alloys will significantly depend on the cast microstructure. The current study is focussed on understanding the evolution of the cast microstructure during V...

Journal: :iranian journal of materials forming 2015
m. aghaie-khafri m.h. sheikh ansary

structural steels with very high strength levels are often referred to as ultrahigh-strength steels (uhss). the usage of uhss has been extensively studied in aerospace industries and offshore platforms. in this study, medium carbon low alloy steel (ams6305) was thermomechanicaly treated to obtain an ultra-high strength bainitic steel for aircraft engine compressor disk. a novel themomechanical ...

Journal: :journal of dental research, dental clinics, dental prospects 0
amin salem milani assistant professor, dental and periodontal disease research center, faculty of dentistry, tabriz university of medical sciences, tabriz, iran. saeed rahimi professor of endodontics, department of endodontics, faculty of dentistry, tabriz university of medical sciences, tabriz, iran mohammad froughreyhani associate professor, department of endodontics, faculty of dentistry, tabriz university of medical sciences, tabriz, iran. mahdi vahid pakdel post-graduate student, department of prosthodontics, faculty of dentistry, tabriz university of medical sciences, tabriz, iran

background and aims: in various clinical situations, mineral trioxide aggregate (mta) may come into direct contact with blood. the aim of the present study was to evaluate the effect of exposure to blood on marginal adaptation and surface microstructure of mta. materials and methods: thirty extracted human single-rooted teeth were used in this study. standard root canal treatment was carried ou...

Journal: :international journal of iron & steel society of iran 2011
m. m. karkeh abadi a. najafizadeh a. kermanpur y. mazaheri

in the present study, the influence of annealing temperature on mechanical properties and the microstructure of a high manganese austenitic steel (fe-30mn-4al-4si-0.5c) was investigated. x-ray diffractometry, optical and scanning electron microscopy, hardness and tensile tests were used to analyze the relationship between mechanical properties and microstructure after annealing process. the res...

Journal: :تحقیقات مهندسی کشاورزی 0
حسین کیانی دانشجوی سابق کارشناسی ارشد دانشکده مهندسی و فناوری کشاورزی سیدمحمدعلی ابراهیم زاده موسوی استاد گروه آموزشی مهندسی صنایع غذایی سیدهادی رضوی دانشیار گروه آموزشی مهندسی صنایع غذایی محمدسعید یارمند استادیار گروه آموزشی مهندسی صنایع غذایی علی دینی دانشجوی سابق دانشکده مهندسی و فناوری کشاورزی

as a native fermented dairy drink, doogh is an important industrial product in iran. however, its characteristics have not been completely evaluated. this study evaluated the flow behavior, particle size distribution and stability of non-fat doogh as affected by the row material employed (fresh skim milk or skim milk powder) and the total solids (ts) content of the final drink. the viscosity of...

Journal: :international journal of iron & steel society of iran 2015
a sonboli m. r. toroghinejad h. edris j. a. szpunar

in this study, the effect of cold rolling process on the microstructure and texture evolution in 1wt. % si non-orientedelectrical steel was investigated. for this purpose, all samples were processed through single-stage hot rolling at1100 ° c and two-stage cold rolling (cross rolling and unidirectional rolling) with intermediate annealing at 650 °cfor 35 seconds. finally, all of them were fully...

Journal: :journal of oil, gas and petrochemical technology 2014
mahdi abdollahi mohammad reza yousefi parisa alamdar heidar ranjbar fardin seyyed najafi

polybutadiene nanoparticles were synthesized via batch emulsion polymerization of butadiene in the presence of potassium persulfate, disproportionate rosinate potassium cation and t-dodecyl mercaptane as initiator, emulsifier and chain transfer agent, respectively. polymerization reaction was performed at different temperatures (60, 70 and 80 °c). conversion was measured at the various time int...

2011
Victor L. Berdichevsky

It is gradually getting clear that the macroscopic description of microstructure evolution requires additional thermodynamic parameters, entropy of microstructure and temperature of microstructure. It was claimed that there is "one more law of thermodynamics": entropy of microstructure must decay in isolated thermodynamic stable systems. Such behavior is opposite to that of thermodynamic entrop...

Journal: :energy equipment and systems 0
ali hasanabadi school of mechanical engineering, college of engineering, university of tehran, p.o. box 111554563, tehran, iran majid baniassadi school of mechanical engineering, college of engineering, university of tehran, p.o. box 111554563, tehran, iran karen abrinia school of mechanical engineering, college of engineering, university of tehran, p.o. box 111554563, tehran, iran mostafa baghani school of mechanical engineering, college of engineering, university of tehran, p.o. box 111554563, tehran, iran mohsen mazrouei sebdani school of mechanical engineering, college of engineering, university of tehran, p.o. box 111554563, tehran, iran

an efficient procedure is presented for the evaluation of solid oxide fuel cell (sofc) anode microstructure triple phase boundary length (tpbl). triple phase boundary- the one that is common between three phases of the microstructure- has a great influence on the overall efficiency of sofc because all electrochemical reactions of anode take place in its vicinity. therefore, evaluation of tpbl f...

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