نتایج جستجو برای: Sever plastic deformation

تعداد نتایج: 120871  

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2012
ghader faraji* mahmoud mosavi mashhadi karen abrinia

the current study conducted a finite element (fe) and experimental investigation on tubular channel angular pressing as a noble severe plastic deformation technique for producing ultrafine grained and nanostructure tubular components. to examine the effects of the tcap process on the strain distribution and deformation behavior, fe simulations were employed. the fe results demonstrated that equ...

ژورنال: Journal of Railway Research 2014
Hosseini, Amirsaeed, Hosseini Tehrani , Parisa ,

At the collision time, a lot of energy is generated during a short period of time that causes large deformations in bodies. One of the most important parts of wagon in railway is a buffer which may absorb the energy during an impact. It should be mentioned that normal buffers only absorb the energy resulted from a crash elastically. In the present paper, it is tried to use inversion mode of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مراغه - دانشکده فنی 1393

یکی از روش های پیشرفته برای بهبود خواص مکانیکی قطعات صنعتی، فرایند تغییر شکل پلاستیک شدید spd (sever plastic deformation) میباشد. این فرایند تکنیک های بسیار متعددی دارد که از جدیدترین آنها می توان به تکنیک (accumulative press bonding) apb اشاره کرد. در این فرایند نمونه ها بر روی میز صاف ماشین پرس قرار داده شده و یک سنبه ی مسطح کرنشی در حد 50% بر روی آن ها اعمال میکند یعنی در هر پاس ضخامت نمونه ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان 1388

چکیده ندارد.

Journal: :international journal of iron & steel society of iran 2012
h. moosalu a. noori teymorlu n. parvini ahmadi s. yazdani

this study was conducted in order to investigate the influence of plastic deformation on the transformation of retained austenite in a trip steel with a high content of al and a low content of si. to the aim, appropriate treatments were used to produce the starting material (trip steel). the microstructure of the obtained steel was composed of bainite and phases including ferrite and retained a...

Journal: :international journal of advanced design and manufacturing technology 0
akbar sajadi f. javanroodi m. borhani

fabrication of ultrafine grained materials by imposing severe plastic deformation for improvement of mechanical and physical properties of metals has been the focus of many researches over the past few years. in this process, a sheet is subjected to repetitive shear deformation conditions by utilizing asymmetrically grooved and flat dies through alternate pressing. in this study, a 2mm thick co...

A. Noori Teymorlu H. Moosalu, N. Parvini Ahmadi, S. Yazdani,

This study was conducted in order to investigate the influence of plastic deformation on the transformation of retained austenite in a TRIP steel with a high content of Al and a low content of Si. To the aim, appropriate treatments were used to produce the starting material (TRIP steel). The microstructure of the obtained steel was composed of bainite and phases including ferrite and retained a...

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