عنوان :
بررسي متغيرهاي عمليات حرارتي برگشت و پير سازي مجدد بر خواص مكانيكي و خستگي آلياژ آلومينيومT6-7075
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب مواد
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان ، دانشكده مواد
صفحه شمار :
ده، 96، [II] ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به: فارسي و انگليسي
استاد راهنما :
احمد كرمانپور، محمود منير واقفي
استاد مشاور :
عباس نجفي زاده
توصيفگر ها :
پير سازي مصنوعي , متالوگرافي نمونه ها , آناليز عنصري , دياگرام S-N
تاريخ نمايه سازي :
30/10/86
استاد داور :
ابراهيم حشمت دهكردي، فخرالدين اشرفي زاده
چكيده فارسي :
به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال
چكيده انگليسي :
AbstractIn this work effect of Retrogression and Reaging RRA treatment on microstructure mechanical properties and fatigue properties of 7075 T6 aluminum alloy wasinvestigated At first forged samples were homogenized at 460 C for 30 min and thenT6 treatment was performed on these samples at 120 C for 24 hr RRA treatment wascarried out at various temperatures of 180 200 220 240 C for 5 10 20 min following quenching T6 temper was performed on all samples Mechanical propertiesof all samples were measured The microstructures of T6 and RRA samples were characterized with opticalmicroscopy and composition of precipitates was found with EDS analysis Mechanical results showed that hardness and tensile strength increased 13 throughRRA at 200 C for 5min with respect to T6 The effect of RRA treatment on Fatigueproperties was measured by rotation bending test with load ratio 1 Fatigue resultsshowed that the RRA treatment can improve the fatigue strength of 7075 alloy Fractography analysis showed that space between striation lines in RRA samples isless than T6 ones confirming that RRA treatment can improve the fatigue resistance
استاد راهنما :
احمد كرمانپور، محمود منير واقفي
استاد مشاور :
عباس نجفي زاده
استاد داور :
ابراهيم حشمت دهكردي، فخرالدين اشرفي زاده
