Effects of Welding Parameters on Mechanical Properties in Electron Beam Welded CuCrZr Alloy Plates

7th National Conference on Processing and Characterization of Materials

Jaypuria, Sanjib^1 ; Doshi, Nirav^1 ; Pratihar, Dilip Kumar^1

Mechanical Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur

721302, India^1

关键词: Beam parameter;    CuCrZr alloy;    High frequency oscillations;    High thermal conductivity;    International thermonuclear experimental reactor;    Microstructural variation;    Plasma-facing components;    Ultimate tensile strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/338/1/012013/pdf
DOI  :  10.1088/1757-899X/338/1/012013

来源: IOP

【 摘 要 】

CuCrZr alloys are attractive structural materials for plasma-facing components (PFC) and heat sink element in the International Thermonuclear Experimental Reactor (ITER) fusion reactors. This material has gained so much attention because of its high thermal conductivity and fracture toughness, high resistance to radiation damage and stability at elevated temperatures. The objective of this work is to study the effects of electron beam welding parameters on the mechanical strength of the butt welded CuCrZr joint. Taguchi method is used as the design of experiments to optimize the input parameters, such as accelerating voltage, beam current, welding speed, oscillation amplitude and frequency. The joint strength and ductility are the desired responses, which are measured through ultimate tensile strength and percent elongation, respectively. Accelerating voltage and welding speed are found to have significant influence on the strength. A combination of low amplitude and high-frequency oscillation is suggested for the higher joint strength and ductility. There is a close agreement between Taguchi predicted results and experimental ones. Fractographic analysis of joint and weld zone analysis are carried out to study the failure behaviour and microstructural variation in the weld zone, respectively.