Material removal produced by a high‐power‐density electron beam

1977 ◽  
Vol 48 (7) ◽  
pp. 3035-3041 ◽  
Author(s):  
T. Miyazaki
Keyword(s):  
Electron Beam ◽  
Power Density ◽  
High Power ◽  
Material Removal ◽  
High Power Density

Comparison of microstructure, mechanical properties, and residual stresses in tungsten inert gas, laser, and electron beam welding of Ti–5Al–2.5Sn titanium alloy

2017 ◽  
Vol 233 (7) ◽  
pp. 1336-1351
Author(s):  
Massab Junaid ◽  
Khalid Rahman ◽  
Fahd Nawaz Khan ◽  
Nabi Bakhsh ◽  
Mirza Nadeem Baig
Keyword(s):  
Electron Beam ◽  
Residual Stresses ◽  
Power Density ◽  
Fusion Zone ◽  
High Power ◽  
Electron Beam Welding ◽  
Inert Gas ◽  
High Power Density ◽  
Cooling Rates ◽  
Zone Width

Electron beam welding (EBW), pulsed Nd:YAG laser beam welding (P-LBW), and pulsed tungsten inert gas (P-TIG) welding of Ti–5Al–2.5Sn alloy were performed in order to prepare full penetration weldments. Owing to relatively high power density of EBW and LBW, the fusion zone width of EBW weldment was approximately equal to P-LBW weldment. The absence of shielding gas due to vacuum environment in EBW was beneficial to the joint quality (low oxide contents). However, less cooling rates were achieved compared to P-LBW as an increase in heat-affected zone width and partial α′ martensitic transformation in fusion zone were observed in EBW weldments. The microstructure in fusion zone in both the EBW and P-TIG weldments comprised of both acicular α and α′ martensite within the prior β grains. Hardness of the fusion zone in EBW was higher than the fusion zone of P-TIG but less than the fusion zone of P-LBW weldments due to the observed microstructural differences. Notch tensile specimen of P-LBW showed higher load capacity, ductility and absorbed energy as compared to P-TIG and EBW specimens due to the presence of high strength α′ martensite phase. Maximum sheet distortions and tensile residual stresses were observed in P-TIG weldments due to high overall heat input. The lowest residual stresses were found in P-LBW weldments, which were tensile in nature. This was owing to high power density and higher cooling rates in P-LBW operation. EBW weldment exhibited the highest compressive residual stresses due to which the service life of EBW weldment is expected to improve.

Emittance of high-power-density electron beam

Vacuum ◽  
1999 ◽  
Vol 55 (3-4) ◽  
pp. 223-233 ◽  
Author(s):  
Jan Felba
Keyword(s):  
Electron Beam ◽  
Power Density ◽  
High Power ◽  
High Power Density

High‐power‐density electron‐beam‐sustained laser

1983 ◽  
Vol 54 (4) ◽  
pp. 458-462 ◽  
Author(s):  
M. Casey ◽  
P. W. Smith ◽  
M. H. R. Hutchinson
Keyword(s):  
Electron Beam ◽  
Power Density ◽  
High Power ◽  
High Power Density

Features and Application of Electron Beam Welding Technology

2015 ◽  
Vol 1120-1121 ◽  
pp. 1308-1312
Author(s):  
Ming Feng Li ◽  
Zheng Hong Zhu
Keyword(s):  
Electron Beam ◽  
Power Density ◽  
High Power ◽  
Electron Beam Welding ◽  
High Ratio ◽  
High Power Density ◽  
High Quality ◽  
Welding Equipment ◽  
Welding Technology ◽  
Wide Range

Electron beam welding technology is a mature special welding technology. The advantage of electron beam welding like these: high power density, high ratio of depth-to-width, high-quality welds. Electron beam welding equipment has been independently developed by tracking and bringing in. Electron beam welding technology has a wide range of applications in the aerospace, automotive, medical and other branches of industry, the field of applications is also expanding with the improved welding equipment. According to the demand of research and market, Electron beam welding technology will move toward the direction of universal, integrated, information-oriented in the future.

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