TY - GEN
T1 - Finite element analysis of thermal effect on large thick titanium alloy electron beam welding with different focus
AU - Zhang, Binggang
AU - Chen, Guoqing
AU - Guo, Wei
AU - Shi, Mingxiao
PY - 2012
Y1 - 2012
N2 - A composite heat source model composed of Gaussian surface heat source and rotational paraboloidal body heat source have been established to simulate the temperature field of 20mm TA15 titanium alloy. The results show that the simulated peak temperature of molten pool during surface focus welding is 3200°C, while the simulated peak temperature of molten pool during lower focus is 2700°C, and the whole surface temperature of surface focus welding is higher than that of lower focus welding, while the whole inner temperature of surface focus welding is lower than that of lower focus. The simulated temperature gradient in the direction of depth during surface focus welding is large, but the simulated temperature gradient in the direction of depth during lower focus welding is small. The simulated result was verified by the thermocouple and contrast of weld cross section morphology. The simulated thermal cycle curves are well consistent to the results tested by thermocouple, and there is a good consistency between the simulated molten pool morphology and the real weld morphology, they verify the accuracy of finite element model.
AB - A composite heat source model composed of Gaussian surface heat source and rotational paraboloidal body heat source have been established to simulate the temperature field of 20mm TA15 titanium alloy. The results show that the simulated peak temperature of molten pool during surface focus welding is 3200°C, while the simulated peak temperature of molten pool during lower focus is 2700°C, and the whole surface temperature of surface focus welding is higher than that of lower focus welding, while the whole inner temperature of surface focus welding is lower than that of lower focus. The simulated temperature gradient in the direction of depth during surface focus welding is large, but the simulated temperature gradient in the direction of depth during lower focus welding is small. The simulated result was verified by the thermocouple and contrast of weld cross section morphology. The simulated thermal cycle curves are well consistent to the results tested by thermocouple, and there is a good consistency between the simulated molten pool morphology and the real weld morphology, they verify the accuracy of finite element model.
KW - Electron beam welding
KW - Numerical simulation
KW - Temperature field
KW - Titanium alloy
UR - https://www.scopus.com/pages/publications/84863123165
U2 - 10.4028/www.scientific.net/AMM.152-154.665
DO - 10.4028/www.scientific.net/AMM.152-154.665
M3 - 会议稿件
AN - SCOPUS:84863123165
SN - 9783037853528
T3 - Applied Mechanics and Materials
SP - 665
EP - 671
BT - Mechanical Engineering and Materials
T2 - 2012 International Conference on Mechanical Engineering and Materials, ICMEM 2012
Y2 - 15 January 2012 through 16 January 2012
ER -