پديد آورنده :
شعشعاني، آرمين
عنوان :
بررسي تجربي و شبيه سازي پارگي گرم در كاموزيت ريختگي آلومينيم - مس تقويت شده با ذرات كاربيد سيليسيم
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي مواد
صفحه شمار :
چهارده، 80ص.: مصور، جدول، نمودار
استاد راهنما :
بهزاد نيرومند
توصيفگر ها :
كامپوزيت زمينه فلزي , آزمون ICTC , AL- 4.7wt.%Cu , AL - Cu - SiC
تاريخ نمايه سازي :
1394/07/04
استاد داور :
علي شفيعي، محمود مرآتيان
تاريخ ورود اطلاعات :
1396/10/04
چكيده فارسي :
به فارسي و انگليسي
چكيده انگليسي :
87Ali Maleki maleki110@cc iut ac irAbstractHot tearing is a common defect encountered in large freezing range cast alloys It occurs when the linearcontraction of the alloy which is going through its semi solid state is hindered by rigid cores or moldsections It has been shown that hot tearing includes two distinct stages of nucleation and growth and thatvolumetric defects such as gas and shrinkage porosity as well as entrained inclusions facilitates nucleation ofhot tears For this reason cast metal matrix composites are expected to have higher susceptibility to hottearing than their monolithic counterparts In the present research the occurrence of hot tearing in Al 4 7 Cu SiCP cast composites and their monolithic alloy was studied by computer simulation usingPROCAST software as well as by real casting experiments using Instrumented Constrained T shaped Casing ICTC method Also the effects of magnesium addition to the melt and use of feeding system wereinvestigated To study the influence of reinforcing particles on the occurrence of hot tears changes incontraction force developed during solidification of the castings was measured The simulation resultsindicated that the intensity of hot tearing decreases by incorporation of the feeding system and increases byaddition of the reinforcement particles The maximum contraction force measured in the experimental workfor the monolithic and the reinforced samples both cast using the feeding system was 7380 N and 5420 N respectively This confirms that the reinforcement addition increases the hot tearing intensity Use of feedingsystem however did not show any logical relationship with hot tearing The maximum contraction forcemeasured for the reinforced samples cast without feeding system with and without 2 Mg addition was 7750N and 9330 N respectively This shows that 2 Mg addition has reduced the hot tears tendency Keywords Hot tear Metal matrix composite ICTC test Al 4 7 wt Cu Al Cu SiC Isfahan University of Technology Department of Materials Engineering Experimental investigation and simulation of hot tearing of SiCp reinforced cast aluminum copper composites A thesis Submitted in partial fulfillment of the requirements for the degree of Master of Science
استاد راهنما :
بهزاد نيرومند
استاد داور :
علي شفيعي، محمود مرآتيان
