Propagation Characteristic of Ultrasonic in BT20 Titanium Alloy and Research on Distribution of Ultrasonic Field in Molten Pool of Laser Deposition Repair

2013 ◽  
Vol 40 (12) ◽  
pp. 1203009 ◽  
Author(s):  
杨光 Yang Guang ◽  
郭鹏飞 Guo Pengfei ◽  
王维 Wang Wei ◽  
钦兰云 Qin Lanyun ◽  
卞宏友 Bian Hongyou ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Molten Pool ◽  
Ultrasonic Field ◽  
Propagation Characteristic ◽  
Laser Deposition

Self-Sufficient Modeling of Single Track Deposition of Ti–6Al–4V With the Prediction of Capture Efficiency

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Christopher Katinas ◽  
Shunyu Liu ◽  
Yung C. Shin
Keyword(s):  
Molten Pool ◽  
Deposition Process ◽  
Capture Efficiency ◽  
Laser Deposition ◽  
Single Track ◽  
Profile Error ◽  
Track Geometry ◽  
Direct Laser Deposition ◽  
Direct Laser ◽  
Traditional Manufacturing

Understanding the capture efficiency of powder during direct laser deposition (DLD) is critical when determining the overall manufacturing costs of additive manufacturing (AM) for comparison to traditional manufacturing methods. By developing a tool to predict the capture efficiency of a particular deposition process, parameter optimization can be achieved without the need to perform a costly and extensive experimental study. The focus of this work is to model the deposition process and acquire the final track geometry and temperature field of a single track deposition of Ti–6Al–4V powder on a Ti–6Al–4V substrate for a four-nozzle powder delivery system during direct laser deposition with a LENS™ system without the need for capture efficiency assumptions by using physical powder flow and laser irradiation profiles to predict capture efficiency. The model was able to predict the track height and width within 2 μm and 31 μm, respectively, or 3.3% error from experimentation. A maximum of 36 μm profile error was observed in the molten pool, and corresponds to errors of 11% and 4% in molten pool depth and width, respectively. Based on experimentation, the capture efficiency of a single track deposition of Ti–6Al–4V was found to be 12.0%, while that from simulation was calculated to be 11.7%, a 2.5% deviation.

A Numerical Simulation for Fluid Flow and Temperature Field in the Molten Pool of Laser Cladding on Titanium Alloy

Applied laser ◽  
2014 ◽  
Vol 34 (5) ◽  
pp. 389-394
Author(s):  
王维 Wang Wei ◽  
刘奇 Liu Qi ◽  
杨光 Yang Guang ◽  
钦兰云 Qin Lanyun ◽  
薛雄 Xue Xiong
Keyword(s):  
Numerical Simulation ◽  
Titanium Alloy ◽  
Temperature Field ◽  
Fluid Flow ◽  
Laser Cladding ◽  
Molten Pool

Effect of Process Parameters on Both Molten Pool Temperature and Layer Size During Metal Laser Deposition Shaping

Applied laser ◽  
2013 ◽  
Vol 33 (3) ◽  
pp. 239-244
Author(s):  
卞宏友 Bian Hongyou ◽  
王婷 Wang Ting ◽  
王维 Wang Wei ◽  
杨光 Yang Guang ◽  
钦兰云 Qin Lanyun ◽  
...  
Keyword(s):  
Process Parameters ◽  
Molten Pool ◽  
Laser Deposition

Formation Structure and Properties of Parts from Titanium Alloys Produced by Direct Laser Deposition

2017 ◽  
Vol 265 ◽  
pp. 535-541 ◽  
Author(s):  
M.O. Sklyar ◽  
Olga G. Klimova-Korsmik ◽  
V.V. Cheverikin
Keyword(s):  
Titanium Alloy ◽  
Titanium Alloys ◽  
Fractional Composition ◽  
Laser Deposition ◽  
Deposition Method ◽  
Structure And Properties ◽  
Direct Laser Deposition ◽  
Direct Laser ◽  
Alloy Vt20

In this article, perspective using of the laser deposition method for manufacture details from the titanium alloy VT20 is considered. Dependence on a structure of the fractional composition is shown. Study of the structure and properties of parts, which were produced by DLD technology using different modes and under different conditions.

Investigation of atypical molten pool dynamics in tungsten carbide-cobalt during laser deposition usingin-situthermal imaging

2012 ◽  
Vol 100 (3) ◽  
pp. 034101 ◽  
Author(s):  
Yuhong Xiong ◽  
William H. Hofmeister ◽  
John E. Smugeresky ◽  
Jean-Pierre Delplanque ◽  
Julie M. Schoenung
Keyword(s):  
Tungsten Carbide ◽  
Molten Pool ◽  
Laser Deposition

Temperature Gradient and Heat Conduction of Titanium Alloy during Laser Welding

2010 ◽  
Vol 154-155 ◽  
pp. 42-45
Author(s):  
Ke Rong Zhang ◽  
Jian Xun Zhang
Keyword(s):  
Titanium Alloy ◽  
Heat Conduction ◽  
Liquid Phase ◽  
Energy Density ◽  
Temperature Gradient ◽  
Molten Pool ◽  
Solid Phase ◽  
Laser Energy ◽  
Laser Energy Density ◽  
Heating And Cooling

This paper set a numerical calculation model with local mesh refined for laser welding of titanium alloy applying body heat source model which can accurately describe the shape of keyhole and molten pool on laser welded joint. It calculated the change patterns of the temperature distribution and heat conduction in region of gas, liquid, and solid phase under different laser energy density on the stage of heating and cooling. The results showed that with the increase of the laser energy density t, the dimension of keyhole and molten pool, the temperature gradient and the duration of gas and liquid phase on the stage of heating and cooling are all expected to increase. Under the same laser energy density, temperature gradient has a maximum value in the region of gas phase, secondly is in liquid phase, and minimum in solid phase.

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