-
انواع خوردگی Corrosion
سهشنبه 29 تیر 1395 23:48
Corrosion خوردگی ABSTRACT Corrosion is often associated with welded structures, since the microstructure, properties, and composition of the weld metal and HAZ may be quite different than those of the base metal. Corrosion takes a number of forms, as described in the  following section, and may result in general...
-
پیشرفتها در فناوری پالایش فولاد و چشمانداز آینده
سهشنبه 29 تیر 1395 23:47
Advances in Steel Refining Technology and Future Prospects پیشرفتها در فناوری پالایش فولاد و چشمانداز آینده ABSTRACT By the 1980s, Nippon Steel Corporation established a separated refining process based on hot-metal pretreatment,2) whereby the contents of silicon, sulfur, and phosphorus in hot metal were decreased...
-
فرایند انجماد و ساختار ریختگی در ریخته گری شمش
جمعه 18 تیر 1395 22:23
Solidification and Processes and Cast Structures فرایند انجماد و ساختار ریختگی ABSTRACT This swction deals with three tranitional solidificationprocesses: ingot casting, continous casting, and welding. however, the last to processe hold a key importance in todays technology. almost entire molten metal is cast into...
-
چقرمگی شکست یک فولاد ضدزنگ سوپر داپلکس جوشکاری شده
جمعه 18 تیر 1395 22:21
Fracture toughness of a welded super duplex stainless steel چقرمگی شکست یک فولاد ضدزنگ سوپر داپلکس جوشکاری شده ABSTRACT Fracture toughness testing was conducted on standard single-edge notched bend bar specimens of base and weld metal. The material was the SAF 2906 super duplex stainless steel. The aim was to evaluate...
-
رفتار زینترینگ و مقاومت هیدروژنی دولومیت واکنشی
جمعه 18 تیر 1395 22:20
Sintering, consolidation, reaction and crystal growth by the spark plasma system (SPS) رفتار زینترینگ و مقاومت هیدروژنی دولومیت واکنشی ABSTRACT Sintering of raw dolomite and hydroxides derived from dolomite was carried out in the temperature range 1350–1650 °C. The hydroxide derived from dolomite was developed through...
-
شناسایی ساختار و انتقال بار لایه های گرافن
جمعه 18 تیر 1395 22:19
Structural and charge transport characteristics of graphene layers obtained from CVD thin film and bulk graphite materials شناسایی ساختار و انتقال بار لایه های گرافن حاصل از لایه نازک CVD و مواد گرافیتی ABSTRACT We report an experimental comparative study of graphene layers produced by micromechanical cleavage of bulk...
-
آنالیز اشعه ایکس Ti-Nb-Ta-Zr در آلیاژهای تیتانیوم
جمعه 18 تیر 1395 22:15
In situ X-ray analysis of mechanism of nonlinear super elastic behavior of Ti–Nb–Ta–Zr system beta-type titanium alloy for biomedical applications آنالیز اشعه X در جای مکانیسم رفتار سوپرالاستیک غیرخطی سیستم Ti-Nb-Ta-Zr در آلیاژهای تیتانیوم نوع بتا برای کاربردهای زیستپزشکی ABSTRACT Ti–XNb–10Ta–5Zr (mass %) alloys...
-
پیوند نفوذی فاز مایع گذرا با استفاده از پوششهای نانوپراکندهی Ni
جمعه 18 تیر 1395 22:14
Transient liquid phase diffusion bonding Al-6061 using nano-dispersed Ni coatings پیوند نفوذی فاز مایع گذرا با استفاده از پوششهای نانوپراکندهی Ni ABSTRACT Transient liquid phase diffusion bonding (TLPDB) of Al-6061 containing 15 vol.% alumina particles was carried out at various bonding temperatures. A 5 μm thick...
-
افزودن کاربید بور پراکنده شده به مواد ترموالکتریک برپایه تلوراید بیسموت
جمعه 18 تیر 1395 22:14
Spark Plasma Sintered bismuth telluride-based thermoelectric materials incorporating dispersed boron carbide افزودن کاربید بور پراکنده شده به مواد ترموالکتریک برپایه تلوراید بیسموت سینتر شده به روش پلاسمای جرقه ای ABSTRACT The mechanical properties of bismuth telluride based thermoelectric materials have received much...
-
خواص سایش پوشش CrC–37WC–18M رسوب داده شده
جمعه 18 تیر 1395 22:13
Wear properties of CrC–37WC–18M coatings deposited by HVOF and HVAF spraying processes خواص سایش پوشش CrC–37WC–18M رسوب داده شده توسط فرایندهای پاشش HVOF و HVAF ABSTRACT CrC–37WC–18M cermet coatings were deposited using new feedstock powders which seem to combine the properties of WC–CoCr and CrC–NiCr coatings. A...
-
کامپوزیتهای زمینه سرامیکی بافته شده
جمعه 18 تیر 1395 22:12
Multiscale model of woven ceramic matrix composites considering manufacturing induced damage کامپوزیتهای زمینه سرامیکی بافته شده با توجه به آسیبهای ایجاد شدهی تولید ABSTRACT Multiscale models play an important role in capturing the nonlinear response of woven carbon fiber reinforced ceramic matrix composites. In...
-
فرایند زینترینگ انفعالی و خواص ترموالکتریک کاربیدهای غنی از بور
جمعه 18 تیر 1395 22:07
Reactive sintering process and thermoelectric properties of boron rich boron carbides فرایند زینترینگ انفعالی و خواص ترموالکتریک کاربیدهای غنی از بور ABSTRACT Dense boron rich boron carbides were reactive sintered by hot pressing at 2050 °C using elementary boronsingle bondcarbon compositions with carbon contents of...
-
آموزش نرم افزار Sysweld شبیه سازی جوشکاری و عملیات حرارتی
چهارشنبه 29 مهر 1394 11:43
آموزش نرم افزار Sysweld شبیه سازی جوشکاری و عملیات حرارتی قوی ترین نرم افزار شبیه سازی جوشکاری عملیات حرارتی و اتصالات جوش نرم افزار SYSweld معروف ترین و پرکاربردترین نرم افزار شبیه سازی در صنعت جوشکاری و عملیات حرارتی می باشد . همانگونه که می دانید که نرم افزارهای شبیه سازی مهندسی نرم افزارهایی کاربرپسند نیستند و...
-
مواد الکتروکرومیک
پنجشنبه 23 مهر 1394 18:55
Electrochromic Materials مواد الکتروکرومیک ABSTRACT A set of materials exhibit electrochromic activity when constituted as a thin film structure whose coloration can be changed reversibly by electrical charging and discharging . there are two types of such electrochromic materials . The first type is uncolored when...
-
مواد ابر رسانا
پنجشنبه 23 مهر 1394 18:14
Superconducting Materials مواد ابر رسانا ABSTRACT The phenomenon of superconductivity came to be known in 1911 by observing that a capillary column of mercury immersed in a liquid helium bath woud show an abrupt reduction in resistance and at 4.2 K it became impossible to measure the low resistance exhibited by the...
-
مقدمه الزامات مهندسی برای مواد کامپوزیتی صنعت هوافضا
پنجشنبه 23 مهر 1394 18:13
Introduction: engineering requirements for aerospace composite materials مقدمه الزامات مهندسی برای مواد کامپوزیتی صنعت هوافضا ABSTRACT Composite materials have gained popularity (despite their generally high cost) in high performance products that need to be lightweight, yet strong enough to take high loads such as...
-
وضعیت صنعت در کنترل آخال ها در طی ریخته گری شمش فولادی
پنجشنبه 23 مهر 1394 18:11
S tate of the Art in the Control of Inclusions during Steel Ingot Casting وضعیت صنعت در کنترل آخال ها در طی ریخته گری شمش فولادی ABSTRACT This article extensively reviews published research on inclusions in ingot steel and defects on ingot products, methods to measure and detect inclusions in steel, the causes of...
-
مواد نیمه رسانا
پنجشنبه 23 مهر 1394 18:08
Semiconducting Materials مواد نیمه رسانا ABSTRACT Semiconductors are materials which have resistivities between the extremes of metallic conductors and insulators. A typical scale of conductivity of materials is depicted in Figure 10.1 . Semiconductors lie approximately between conductors ( with σ > 10 5...
-
مواد فروالکتریک
پنجشنبه 23 مهر 1394 12:22
Ferroelectric Materials مواد فروالکتریک ABSTRACT Ferroelectric materials are typically nonlinear dielectrics with the following characteristics : They exhibit distinct dependency of permittivity on the intensity of an applied electric field The dielectric displacement versus applied electric field follows hysteresis...
-
مواد الکترولیت جامد
پنجشنبه 23 مهر 1394 12:15
Solid Electrolytic Materials مواد الکترولیت جامد ABSTRACT Also known as superionic conductors solid electrolytes are ionic materials which exhibit high electrical conductivity ( in comparsion whit liquid electrolytes ) above a certain critical temperature . They are also termed as fast-ion conductors . A solid...
-
مواد فریتی
پنجشنبه 23 مهر 1394 12:10
Ferrites Materials مواد فریتی ABSTRACT Ferrites are mixed crystals of various metallic oxides and may be considered to consist of oxygen ions in a closed-packed structure with cations filling the interstices . They have a general formula : MOFe 2 O 3 , xH 2 O where M is a divalent metallic ion such as Mn 2+ , Fe 2+ ,...
-
مواد فرومغناطیسی
پنجشنبه 23 مهر 1394 12:05
Ferromagnetic Materials مواد فرومغناطیسی ABSTRACT Ferromagnetic materials have the ability to carry high magnetic flux . Ferromagnetism refers to the property of increasing the magnetic flux associated with the material when a magnetizing force is applaid , but there exists a saturation point for most of the magnetic...
-
مواد کامپوزیتی پیزوالکتریک
پنجشنبه 23 مهر 1394 11:56
Piezoelectric Composite Materials مواد کامپوزیتی پیزوالکتریک ABSTRACT A piezoelectric Composite is a combination of a piezoelectric ceramic and/or polymer and a nonpiezoelectric polymer constituting a new version of piezoelectric material . In general terms , piezoelectric composite applies to any piezoelectric...
-
مواد هوشمند الکترو مغناطیس
چهارشنبه 22 مهر 1394 12:00
Electromagnetic smart Material مواد هوشمند الکترو مغناطیس ABSTRACT smart materials refer to a class of materials and/or composite media having inherent intelligence together with self-adaptive capabilities to external stimuli . Also known as intelligent materials they constitute a few subsets of the material family...
-
مواد جاذب امواج الکترومغناطیسی
چهارشنبه 22 مهر 1394 11:59
Electromagnetic wave Absorbing Materials مواد جاذب امواج الکترومغناطیسی ABSTRACT For specific application there is a need for materials which absorb the electromagnetic energy incident on them . These nonreflective electromagnetic wave (EM) absorbing materials are useful as radar absorbing materials (RAMs) as surface...
-
کنترل استاتیک مواد
چهارشنبه 22 مهر 1394 11:57
Static Control Materials کنترل استاتیک مواد ABSTRACT Static control materials are those which are useful to prevent or minimize the buildup of electrostatic charges on conducting and/or noconducting bodies . These materials are essentially of three typses : (1) Antistatic materials ; (2) static dissipative materials...
-
مواد الکترو اپتیک
چهارشنبه 22 مهر 1394 11:56
Electrooptic Materials مواد الکترو اپتیک ABSTRACT The term electrooptic effect refers to a change in the refractive index of a transparent substance induced by an applied electric field , usually at a frequency below the optic vibrational resonance of the lattice or the molecules involved . the linear and quadratic...
-
مواد هوشمند الکترو مغناطیس
چهارشنبه 22 مهر 1394 09:27
Electromagnetic smart Material مواد هوشمند الکترو مغناطیس ABSTRACT smart materials refer to a class of materials and/or composite media having inherent intelligence together with self-adaptive capabilities to external stimuli . Also known as intelligent materials they constitute a few subsets of the material family...
-
مواد دارای تغییر شکل در اثر الکتریسیته
چهارشنبه 22 مهر 1394 08:24
Electroheological Materials مواد دارای تغییر شکل در اثر الکتریسیته (Electrorheological) ABSTRACT The electroheological effect refers to the abrupt change in viscosity in certain colloidal sols when subjected to an electric field . The phenomenon of electroheology (ER) was first reported by w . M. Winslow in 1947 and...
-
مواد چیرال الکترومغناطیس
سهشنبه 21 مهر 1394 13:53
Electromagnetic chiral Material مواد چیرال الکترومغناطیس ABSTRACT A special class of electromagnetic (EM) material referred to as chiral materials are emerging in engineering application . A chiral medium is one whose electric and magnetic fields are cross-coupled . The characteristic aspect of such materials is the...