TAILIEUCHUNG - The microstructural characteristics in a superalloy hybrid component fabricated by friction process

The dissimilar superalloy joint between Inconel 718 and Mar-M247 was fabricated by friction welding process. The microstructure in and around the welding was investigated by the Scanning Electron Microscope (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The welding was found to be free of defect and the welded zone was quite narrow. The diffused zone between the two base metals was tine. | Journal of Science and Technology 55 (2) (2017) 244-249 DOI: THE MICROSTRUCTURAL CHARACTERISTICS IN A SUPERALLOY HYBRID COMPONENT FABRICATED BY FRICTION PROCESS Tran Hung Tra1, *, Atsushi Sano2 1 2 Nha Trang University, 02 Nguyen Dinh Chieu St., Nha Trang City,Vietnam Nagaoka University of Technology, Kamitomioka-Machi 1603-1, Niigata, Japan, 940-2188 * Email: tra@ Received: 7 May 2016; Accepted for publication: 9 January 2017 ABSTRACT The dissimilar superalloy joint between Inconel 718 and Mar-M247 was fabricated by friction welding process. The microstructure in and around the welding was investigated by the Scanning Electron Microscope (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The welding was found to be free of defect and the welded zone was quite narrow. The diffused zone between the two base metals was tine. The microstructure in the welded zone was recrystallized significantly and revealed a very complicated morphology and characteristics in Inconel 718 side. Inconel 718 and Mar-M247 could be joined successfully by the friction welding process. Keywords: dissimilar friction welding, superalloys, microstructure characteristics. 1. INTRODUCTION Inconel 718 and Mar-M247 are the superalloys suitable for high temperature applications [1]. The joining of these two superalloys is expected to produce the hybrid components possessing excellent strength. The aim to join these dissimilar alloys is addressed to fabricate the “blisk” in gas turbines. Friction welding is an attractive method for dissimilar joining metals with high γ’ volume fraction such as Nickel based superalloys that considered to be unweldable by other welding methods [2 - 5]. One of the most advantages of friction welding is that the joints can be archived at a temperature below the melting point and thus this technique can join all metals including MMCs (metal matrix composites). In engineering, the welding of dissimilar metals is .

• Hoá học
• Journal of Science and Technology
• The microstructural characteristics
• Superalloy hybrid component fabricated by friction process
• The Scanning Electron Microscope
• Energy dispersive X ray spectroscopy
• Journal of Marine science and Technology
• Marine science and Technology
• Marine science and Technology no 56
• Marine science and Technology year 2018
• Evaluation method
• Electrical energy management model
• Marine science and Technology no 53
• Diesel engines
• Journal of Fisheries science and Technology
• Fisheries science and Technology
• Fisheries science and Technology no 3
• Fisheries science and Technology year 2016
• Striped catfish
• Common carp cyprinus carpio
• Fisheries science and Technology no 4
• Fisheries science and Technology year 2018
• Coastal fi shing activities
• White striped cleaner shrimp
• Journal of Science
• Journal of Technology
• Technology Management
• Science and Technology
• International integration
• Science and Technology Strategy
• Evaluation of science and technology
• Global journal of computer science
• Global journal of computer science and technology
• Information & technology
• GIS based fire emergency response system
• Marine science and technology no 61
• Actual GPS receivers
• Display information on stability
• Nuclear science and technology
• The journal of Nuclear science and technology
• Rotary rack served for elemental concentration
• Seawaterusing co precipitation method
• Natural radionuclides
• Experimental data
• Low energy experiments
• Multigroup cross sections
• Stable isotopic values
• Radial blanket
• Dissolved nitrogen compounds
• Irradiation channels
• Neutron rich nuclei
• Prescila neutron probe
• Full core conversion
• Multipurpose research reactor
• Aquatic environment
• Geochemical parameters
• External reactor vessel cooling method
• Radiation crosslinked scaffolds
• Adipose derived stem cell culture
• Treatment plans
• Minor actinide compositions
• IM NAA of non standard geometrical samples
• Cross shaped obstacle
• University entrepreneurship
• Entrepreneurial research university
• Technology innovation
• Industry university cooperation
• Regional innovation
• Journal of technology and science education
• Bring science and technology closer to secondary school
• Technology closer to secondary school
• Secondary school teachers
• Face to face
• Technology development
• Technology commercialization
• The role of informal science centers in science education
• Informal science center
• Attudes toward science
• Scientfic thinking skills
• Scientific research
• Research quality
• Strategy and policy
• Research Organizations
• Policy Planning
• Science and Technology development
• Theory Z
• Human Resources
• Development policy of Japan
• ‘Standards’ on the bench
• Technological literacy render an adequate image of technology
• Adequate image of technology
• Standards for technological literacy
• Philosophy of technology
• The nature of technology
• Concepts of technology
• Post secondary project based learning in science
• Post secondary project based learning in technology
• Post secondary project based learning in engineering and mathematics
• Post secondary project