چکیده مقاله
In this study, non homogenous welding of nimonic 75 superalloy to Monel 400 with 1mm thickness was investigated with pulsed Nd:YAG laser welding The mechanicalproperties of the joint were analyzed with optical and scanning electron microscope, Xray diffraction, micro hardness test and tensile test In the case of non homogeneouswelding of Nimoinc 75 superalloy to Monel 400, defects such as liquation cracks andporosity in the welded samples were observed these defects were removed withincreasing the preheating temperature and decreasing the heat input The results showedthe voltage, pulse width, pulse frequency and welding speed should be selected as 500volts, 9 milliseconds, 3 Hz and 0 9 mm/s respectively to reach the proper penetrationdepth Also, the investigations show that the welding structure is composed of austeniticmatrix containing columnar dendrites and some cellular areas The mechanical propertiesof the weld metal were reduced after joining and segregation causes a change in theamount of elements and the appearance of intermetallic compounds in the spacesbetween dendrites and cells All non homogeneous samples broke during the tensile testfrom the weld metal area
کلیدواژه‌ها
نویسندگان
Ramin Mahdizadeh
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran,
Seyed Ali Asghar Akbari Musavi
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
Said Mehdipour
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran
شیوه ارجاع
Mahdizadeh, Ramin and Akbari Musavi, Seyed Ali Asghar and Mehdipour, Said,1401,Investigating the microstructure and mechanical properties of pulsedNd:YAG laser welding of Monel 400 to Nimonic 75,5th International Conference on Welding and Non Destructive Testing & 23rd National Conference on Welding & Inspection & 12th National Conference on NDT,Isfahan
ارائه‌شده در
مجموعه مقالات پنجمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب،بیست و سومین کنفرانس ملی جوش و بازرسی و دوازدهمین کنفرانس ملی آزمایش های غیرمخرب و اولین کنفرانس ملی ساخت افزایشی10 اسفند 1401 · اصفهان