Interfacial behaviors and joint properties of the dual beam laser fusion brazing Ti6Al4V/AA7075 dissimilar metals

2022 ◽  
Vol 73 ◽  
pp. 279-289
Author(s):  
Yang Li ◽  
Xinhua Tang ◽  
Lidong Xu ◽  
Haichao Cui ◽  
Ruolin Zhang
Keyword(s):  
Laser Fusion ◽  
Dissimilar Metals ◽  
Beam Laser ◽  
Dual Beam ◽  
Joint Properties

The Effect of Weld Size on Joint Mechanical Properties of 5A90Al-Li Alloy

2010 ◽  
Vol 146-147 ◽  
pp. 1831-1838 ◽  
Author(s):  
Li Chen ◽  
Wei Wei Xu ◽  
Shui Li Gong
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Laser Welding ◽  
Alloy Sheet ◽  
Weld Width ◽  
Beam Laser ◽  
Full Penetration ◽  
Dual Beam ◽  
Joint Properties

The quality of full penetration laser welding 5A90 Al-Li alloy can be evaluated by weld width, especially the ratio of weld back width to weld surface width (Rw), according to the results from laser welding experiment. And Rw will influence the joint properties, such as tensile strength and fatigue. In this paper, the effect of Rw on joint properties of 5A90 Al-Li alloy sheet are discussed, these joint welded by laser welding, dual beam laser welding .

Temperature and Stress Analysis of Dual-Beam Laser Cladding on Gray Cast Iron Surface

Applied laser ◽  
2014 ◽  
Vol 34 (4) ◽  
pp. 288-293
Author(s):  
刘衍聪 Liu Yancong ◽  
范常峰 Fan Changfeng ◽  
尹晓丽 Yin Xiaoli ◽  
杨光辉 Yang Guanghui ◽  
许鹏云 Xu Pengyun
Keyword(s):  
Cast Iron ◽  
Stress Analysis ◽  
Laser Cladding ◽  
Gray Cast Iron ◽  
Iron Surface ◽  
Gray Cast ◽  
Beam Laser ◽  
Dual Beam

Effect of Energy Ratio on Dual Beam Laser Welding Characteristics

2017 ◽  
Vol 44 (3) ◽  
pp. 0302003
Author(s):  
马国龙 Ma Guolong ◽  
李俐群 Li Liqun ◽  
陈彦宾 Chen Yanbin
Keyword(s):  
Laser Welding ◽  
Energy Ratio ◽  
Beam Laser ◽  
Dual Beam

Influence of Temperature Distribution of Ceramic Coating Using Top-Hat Assistant Laser Beam in Dual-Beam Laser Cladding

2014 ◽  
Vol 41 (7) ◽  
pp. 0703012
Author(s):  
吴东江 Wu Dongjiang ◽  
褚洋 Chu Yang ◽  
牛方勇 Niu Fangyong ◽  
马广义 Ma Guangyi ◽  
庄娟 Zhuang Juan
Keyword(s):  
Temperature Distribution ◽  
Laser Beam ◽  
Laser Cladding ◽  
Ceramic Coating ◽  
Influence Of Temperature ◽  
Beam Laser ◽  
Dual Beam

Investigation of Fluid Flow and Heat Transfer in 3D Dual-Beam Laser Keyhole Welding

2010 ◽  
Author(s):  
Jun Zhou ◽  
Hai-Lung Tsai
Keyword(s):  
Heat Transfer ◽  
Laser Welding ◽  
Welding Process ◽  
Solidification Process ◽  
Melt Flow ◽  
Single Beam ◽  
Keyhole Welding ◽  
Beam Laser ◽  
Dual Beam ◽  
Laser Keyhole Welding

Dual-beam laser welding has become an emerging joining technique. Studies have demonstrated that it can provide benefits over conventional single-beam laser welding, such as increasing keyhole stability, slowing down cooling rate and delaying the humping onset to a higher welding speed. It is also reported to be able to improve weld quality significantly. However, due to its complexity the development of this promising technique has been limited to the trial-and-error procedure. In this study, mathematical models are developed to investigate the heat transfer, melt flow, and solidification process in three-dimensional dual-beam laser keyhole welding. Effects of key parameters, such as laser-beam configuration on melt flow, weld shape, and keyhole dynamics are studied. Some experimentally observed phenomena, such as the changes of the weld pool shape from oval to circle and from circle to oval during the welding process are analyzed in current study.

Higher Order Moments in the Entrainment Zone of Turbulent Penetrative Thermal Convection

1986 ◽  
Vol 108 (2) ◽  
pp. 323-329 ◽  
Author(s):  
R. Kumar ◽  
R. J. Adrian
Keyword(s):  
Heat Flux ◽  
Inversion Layer ◽  
Interfacial Region ◽  
Interfacial Zone ◽  
Stable Layer ◽  
Third Order ◽  
Beam Laser ◽  
Dual Beam ◽  
Entrainment Zone ◽  
Instantaneous Values

In a simulation of the lifting of an atmospheric inversion layer in the laboratory, measurements have been made to understand the dynamics in the interfacial region capped by a stable, linearly stratified layer. Instantaneous values of vertical and horizontal components of velocity have been measured using a two-component dual-beam laser Doppler anemometer. Temperature fluctuations have been made simultaneously. Detailed measurements of all relevant horizontally averaged one-point moments including heat flux and third-order joint vertical velocity–temperature moments have been obtained. The negative heat flux region is well defined in the entrainment zone, and varies in thickness with different stable layer temperature gradients. The entrainment mechanism is probably most important only in the top part of the interfacial zone. The present data supplement data obtained in the atmosphere, and they compare favorably with the existing data in the literature.

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