چکیده مقاله
In this study, a dissimilar joint of cobalt based superalloys X 45 and FSX 414 has been created under the standard heat treatment conditions with the nickel based BNi 9interlayer with the thickness of 50μm by the transient liquid phase bonding process Solution heat treatment 1150°C/4h was used for bonding and the aging heat treatment 980°C/4h for the homogenization of the bond Optical metallography, Field Emission Scanning Electron Microscope with Energy Dispersive X ray Spectroscopy, Differentialscanning calorimetry, micro hardness test and shear strength test were used for the characterization of microstructural and mechanical evolution in base metals and bonds The solution heat treatment leads to the dissolution of a part of the M23C6 and M6C carbides in the substrate of superalloys, which due to the aging heat treatment secondaryand fine carbides M23C6 precipitate in the substrate and help strengthen the superalloys The diffusion of the boron from the molten interlayer to the base metals resulted in the complete isothermal solidification and a nickel based single phase solid solution has been developed Cobalt chromium tungsten molybdenum based carboboridesprecipitation with high hardness in the vicinity of the isothermal solidification zone and in base metals results in the non homogeneity of microhardness profile along the bonding area Homogenization heat treatment did not have an effect on the omission of these precipitations, but by more uniform redistribution of the alloying elements strengthen solid solution that could increase shear strength from 655 to 688 MPa, which is somewhat equivalent to the shear strength of the 45 X alloy and also 93% of the shear strength of the FSX 414 alloy
کلیدواژهها
نویسندگان
Mojtaba Naalchian
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Masoud Kasiri-Asgarani
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Morteza Shamanian
Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
Reza Bakhtiari
Department of Materials Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran
Hamid Reza Bakhsheshi- Rad
Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
شیوه ارجاع
Naalchian, Mojtaba and Kasiri-Asgarani, Masoud and Shamanian, Morteza and Bakhtiari, Reza and Bakhsheshi- Rad, Hamid Reza,1399,The effect of substrate's heat treatment on microstructure and mechanical properties TLP bonding X-45 and FSX-414 cobalt based superalloys,3rd International Conference on Welding and Non-Destructive Testing of Iran, 21st National Conference on Welding and Inspection and 10th National Conference on Non-Destructive Testing,Isfahan
ارائهشده در
مجموعه مقالات سومین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب ایران، بیست و یکمین کنفرانس ملی جوش و بازرسی و دهمین کنفرانس ملی آزمایش های غیرمخرب13 اسفند 1399 · اصفهان