Correlations of thermal accumulation and melt pool geometry during Laser Deposition Titanium Alloy Manufacturing

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Correlations of thermal accumulation and melt pool geometry during Laser Deposition Titanium Alloy Manufacturing
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                        Qin LanyunQin Lanyun
1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
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Xu LiliXu Lili
1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
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Yang GuangYang Guang
1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
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Liu QiLiu Qi
1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
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Wang WeiWang Wei
1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
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Affiliation:1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,1.Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University
Clc Number:TG146.2
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Abstract:

In order to study the effect of thermal accumulation of Laser deposition manufacturing (LDM) process on melt pool geometry. A three-dimensional(3D) multi-layer model for LDMed TA15 titanium alloy was developed to discover thermal cycle characteristics, temperature distribution of melt pool and melt pool geometry. Results showed that melt pools width increase gradually with the increase of deposition layer because of thermal accumulation. The numerical results were validated by experimental-measured values collected by in-situ monitoring techniques. Thermal accumulation is strongly correlated to melt pool width and melt pool inclination, however, melt pool temperature and width gradually become relatively stableSafter a certain number of layers. The experimental data and model prediction show a good agreement.

Key words:Laser deposition manufacturing; melt pool; thermal accumulation; numerical simulation; melt pool inclination

Reference

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[Qin Lanyun, Xu Lili, Yang Guang, Liu Qi, Wang Wei. Correlations of thermal accumulation and melt pool geometry during Laser Deposition Titanium Alloy Manufacturing[J]. Rare Metal Materials and Engineering,2017,46(9):2645~2650.]
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Received:December 14,2016
Revised:February 06,2017
Adopted:February 20,2017
Online: November 29,2017
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