investigation on heat treatment and mechanical behaviour of al2024/gr composites produced by in-situ powder metallurgy

نویسندگان

آرمان زارع بیدکی

دانشگاه تهران farshad akhlaghi

دانشگاه تهران

چکیده

in this study, al/gr composites with 5,10,15,20 weight percent of graphite were produced by in-situ powder metallurgy method. the produced powder mixtures were consolidated and sintered at optimum conditions. the resultant composites were solution treated at 495?c and aged at 170?c. the influence of graphite content on the bending strength of composites was studied. the distribution of graphite in the composite fractured surfaces was studied by sem. it was concluded that the graphite particles were uniformly distributed in the matrix alloy. the maximum hardness could be achieved by aging at 170?c for 5h and this time was independent on the content of graphite. the increased graphite content decreased the bending strength of the composite.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

AN INVESTIGATION ON ABRASIVE WEAR BEHAVIOUR OF Fe-C-Mo-FeCr COMPOSITE PRODUCED BY POWDER METALLURGY

In this study, the effect of chromium carbide (Cr7C3) on abrasive wear behavior of Fe-C-Mo-FeCr composite was investigated. Composite, which was produced by a powder metallurgy route was containing 3 wt.% Mo, 1.5 wt. % C and 4,8,12 wt. % FeCr with the different particle sizes. In the experiments, wear resistance of samples were determined using different loads by a pin on disc wear tester. Micr...

متن کامل

MECHANICAL PROPERTIES OF METAL MATRIX COMPOSITES (Al/SiCp) PARTICLES PRODUCED BY POWDER METALLURGY

Metal matrix composites (MMCs) have become attractive for engineering structural applications due to their excellent specific strength property and are increasingly seen as alternative to the conventional materials particularly in the automotive, aerospace and defence industries. Al/SiC MMC has aluminium matrix and the silicon carbide particles as reinforcements and exhibits many desirable mech...

متن کامل

Mechanical and Tribological Behaviour of Aluminium Metal Matrix Composites Using Powder Metallurgy Technique— a Review

Aluminium metal matrix composites are widely used in engineering applications, specially automobile, aerospace, marine and mineral processing industries owing to their improved wear properties compared to conventional monolithic aluminium alloys. Presently hybrid composites plays vital role in engineering application. The researchers who developed composites, were subjected to many characterisa...

متن کامل

Production and microstructural investigation of Al-nano TiB2 composite produced by powder metallurgy technique

Automotive and aerospace industries are required to light materials which have high properties. This causes to reduce production cost and fuel consumption. One of these advanced materials that have been attracted at these decades is particulate metal matrix nanocomposites. These materials have a combination of ductile matrix alloy properties and ceramic reinforcement nanoparticles. Powder metal...

متن کامل

Production and microstructural investigation of Al-nano TiB2 composite produced by powder metallurgy technique

Automotive and aerospace industries are required to light materials which have high properties. This causes to reduce production cost and fuel consumption. One of these advanced materials that have been attracted at these decades is particulate metal matrix nanocomposites. These materials have a combination of ductile matrix alloy properties and ceramic reinforcement nanoparticles. Powder metal...

متن کامل

Porous, Superelastic NiTi Produced by Powder-Metallurgy

Near-stoichiometric NiTi was foamed in the solid state at elevated temperatures through creep expansion of highpressure argon pores previously entrapped during powder consolidation. A sample with 17% porosity was found to be superelastic up to a compressive stress of 800 MPa.

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
نشریه دانشکده فنی

جلد ۴۳، شماره ۲، صفحات ۰-۰

کلمات کلیدی
[ ' i n t h i s s t u d y ' , ' a l / g r c o m p o s i t e s w i t h 5 ' , 1 0 , 1 5 , ' 2 0 w e i g h t p e r c e n t o f g r a p h i t e w e r e p r o d u c e d b y i n ' , ' s i t u p o w d e r m e t a l l u r g y m e t h o d . t h e p r o d u c e d p o w d e r m i x t u r e s w e r e c o n s o l i d a t e d a n d s i n t e r e d a t o p t i m u m c o n d i t i o n s . t h e r e s u l t a n t c o m p o s i t e s w e r e s o l u t i o n t r e a t e d a t 4 9 5 ? c a n d a g e d a t 1 7 0 ? c . t h e i n f l u e n c e o f g r a p h i t e c o n t e n t o n t h e b e n d i n g s t r e n g t h o f c o m p o s i t e s w a s s t u d i e d . t h e d i s t r i b u t i o n o f g r a p h i t e i n t h e c o m p o s i t e f r a c t u r e d s u r f a c e s w a s s t u d i e d b y s e m . i t w a s c o n c l u d e d t h a t t h e g r a p h i t e p a r t i c l e s w e r e u n i f o r m l y d i s t r i b u t e d i n t h e m a t r i x a l l o y . t h e m a x i m u m h a r d n e s s c o u l d b e a c h i e v e d b y a g i n g a t 1 7 0 ? c f o r 5 h a n d t h i s t i m e w a s i n d e p e n d e n t o n t h e c o n t e n t o f g r a p h i t e . t h e i n c r e a s e d g r a p h i t e c o n t e n t d e c r e a s e d t h e b e n d i n g s t r e n g t h o f t h e c o m p o s i t e . ' ]

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023