2013

مقاله ی مرجع حاضر حاوی ضرایب جانسون-کوک دو ماده ی آلومینیوم AA5083-H116 و همچنین ماده ی فولاد steel 4340 می باشد. مدل جانسون-کوک یکی از مدل های رفتاری ماده می باشد. این مدل دارای دقت بالایی جهت تعریف خواص مکانیکی و حرارتی ماده می باشد. نحوه ی محاسبه ی تنش در مدل رفتاری جانسون-کوک از فرمول زیر تبعیت می کند.مقاله …

Microstructural evolution and mechanical properties of dissimilar Al–Cu joints produced by friction stir welding C.W. Tan a,b, Z.G. Jiang a, L.Q. Li a,⇑, Y.B. Chen a, X.Y. Chen a چچکیده 5A02 aluminum alloy and pure copper were joined by friction stir welding (FSW). A defect-free joint was obtained when one of process parameters, i.e. the traverse speed was lowered from …

دانلود رایگان مقالات science direct  از 4fem Improved continuous tube welding due to unique process sensors system and process control F.Dorsch*,D.Pfitzner,H.Braun چکیده مقاله A unique camera-based triple sensor system increases productivity, yield and quality of continuous welding of tubes and profiles. It combines high -precistion semmtracking and beam positioning with weld spot visualization and characterization,and seam geometry measurement. The higher …

دانلود مقاله های انگلیسی استخراج شده از science direct Nano grainedTi–Nb micro alloy steel achieved by Accumulative Roll Bonding (ARB)process A.A.Tohidi n, M.Ketabchi,A.Hasannia Mining and Metallurgical Engineering Department , Amir kabir University of Technology,Tehran,Iran چکیده مقاله Over the  last  decade,nano crystalline and ultra-fine grained(UFG)materials with grain size less than1 μm have  aroused considerable interest due to their superior mechanical properties …

مقاله ه های انگلیسی  مکانیک science direct The effects of oxide film and annealing treatment on the bond strength of Al–Cu strips in cold roll bonding process Vahid Yousefi Mehr, Mohammad Reza Toroghinejad ⇑, Ahmad Rezaeian Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran چکیده مقاله In this study the influence of Al2O3 coating and post-rolling annealing …

دانلود مقاله انگلیسی استخراج شده از science direct Finite element simulation of accumulative roll-bonding process TadanobuInoue a,n, AkiraYanagida b, JunYanagimoto c National Institute for Materials Science,Sengen1-2-1,Tsukuba305-0047,Japan TokyoDenkiUniversity,Senju-Asahi-Cho5,Adachi-ku,Tokyo120-8551,Japan The UniversityofTokyo,Komaba4-6-1,Meguro-ku,Tokyo153-8505,Japan چکیده مقاله The accumulative roll-bonding (ARB) process, which is a severe plastic deformation process,was simulated using finite element analysis,including the influence of friction,stress–strain relations,and roll diameter.The complicated distributions of equivalent strain …