Investigation into the TIG welded joint of titanium G-5 alloy sheet

International Conference on Mechanical, Materials and Renewable Energy

机械制造;材料科学;能源学

Kumar Gope, Deepak^1 ; Kumar, Uday^1 ; Chattopadhyaya, S.^1 ; Mandal, S.^2

Department of Mechanical Engineering, Indian Institute of Technology (ISM), Dhanbad, India^1

Department of Electrical Engineering, Indian Institute of Technology (ISM), Dhanbad, India^2

关键词: Alloy sheets;    Fusion zones;    Hardness values;    High currents;    Ti-6al-4v titanium alloys;    Tungsten inert gas;    Welding current;    Welding process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/377/1/012114/pdf
DOI  :  10.1088/1757-899X/377/1/012114

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In TIG (Tungsten Inert Gas) welding process Welding Current and Speed are important parameters. This paper investigates into microstructure and some mechanical properties of TIG welded Ti-6Al-4V Titanium alloy. Welding was carried by varying welding current and speed while keeping other parameters constant. It investigates into microstructures of different zone around the welded joint and found that microstructures become coarser near the Fusion Zone (FZ) and Heat Affected Zone (HAZ) and β-Phase predominant at FZ. The analysis of microhardness shows that as we move from base metal to weld centreline hardness value increases and maximum value of hardness was found at Fusion Zone. Highest value of hardness was found to be 472 HVN which is very high compare to base metal which is at low speed and high current i.e. of Sample S3.