پديد آورنده :
ميرزاده سلطان پور، حامد
عنوان :
ارزيابي رفتار ترموديناميكي فولاد زنگ نزن 17 -4 PH
گرايش تحصيلي :
مهندسي مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
سيزده،122ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
عباس نجفي زاده
استاد مشاور :
احمد كرمانپور
توصيفگر ها :
تغيير شكل داغ , تبلور مجدد ديناميكي , روابط تنش سيلان
تاريخ نمايه سازي :
29/8/90
استاد داور :
عباس اكبرزاده، عباس زارعي هنزكي،محمدرضا طرقي نژاد
كد ايرانداك :
ID399 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Study on the Thermomechanical Behavior of 17 4 PH Stainless Steel Hamed Mirzadeh Soltanpour hmirzadeh@ma iut ac ir 2011 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Abbas Najafizadeh a najafi@cc iut ac irSupervisor Advisor Ahmad Kermanpur ahmad k@cc iut ac irDepartment Graduate Coordinator Masoud Panjepour AbstractThe hot deformation behavior of a 17 4 PH stainless steel was investigated by compression test A step bystep procedure for data analysis in hot compression test was given Many samples exhibited typical single peak DRX behavior However at low Zener Hollomon parameter Z this material showed a new dynamicrecrystallization DRX flow behavior namely Multiple Transient Steady State MTSS Two types ofconstitutive equations were used to study the hot deformation behavior 1 a conventional method of findingapparent materials constants and 2 a physically based approach which accounts the dependence of Young smodulus and self diffusion activation energy on temperature Both methods were critically discussed andsome modifications and easy to apply methods were also introduced It was found that when the deformationmechanism is controlled by the glide and climb of dislocations an exponent of 5 can be set in the classicalhyperbolic sine equation and the self diffusion activation energy can be used to describe the appropriatestress A simple constitutive equation was developed in this work for prediction of flow curves Thistechnique and the artificial neural network ANN were found to be suitable for the modeling and predictionof flow curves However the hyperbolic sine equation with strain dependent constants was found to beinappropriate for this purpose The Avrami analysis was successfully used for extrapolation of flow curves The DRX rate parameter DRXRP was proposed in this work for analyzing the kinetics of DRX Keywords 17 4 PH stainless steel Hot deformation Dynamic recrystallization Constitutive equations Flow stress Professor Department of Materials Engineering Isfahan University of Technology Isfahan Iran Associate Professor Department of Materials Engineering Isfahan University of Technology Isfahan Iran Assistant Professor Department of Materials Engineering Isfahan University of Technology Isfahan Iran 1
استاد راهنما :
عباس نجفي زاده
استاد مشاور :
احمد كرمانپور
استاد داور :
عباس اكبرزاده، عباس زارعي هنزكي،محمدرضا طرقي نژاد
