Microstructure and residual stress distribution of electron beam-welded joints of a 50 mm-thick TA15 titanium alloy plate
Author:
Zhao Xilong1ORCID, He Feng1, Wang Kun2, Lu Xinhong1
Affiliation:
1. School of Materials Science and Engineering , Lanzhou Jiaotong University , Lanzhou , P.R. China 2. School of Civil Engineering , Lanzhou Jiaotong University , Lanzhou , P.R. China
Abstract
Abstract
Vacuum electron beam welding was applied to a 50 mm-thick TA15 titanium alloy plate. Microstructure observation and microhardness testing were performed. Meanwhile, the residual stress on the surface at different distances from the weld centre was measured via the hole drilling method. A finite element model for electron beam welding of the TA15 titanium alloy plate was constructed on commercial finite element software. Experimental results showed that the microstructure of the weld zone consisted of a basket martensitic phase. The highest microhardness in the weld zone was 409 HV, and the microhardness of the base metal was the lowest. The maximum gradient change area was located at the HAZ near the base metal. The peak value of longitudinal residual stress from the simulation was 880 MPa, which was in the weld metal. The sharp change area of longitudinal residual stress gradient was located in the base metal near HAZ.
Publisher
Walter de Gruyter GmbH
Reference38 articles.
1. Liu, Q. M., Long, W. M., Fu, L., Zhang, Z. H., Zhang, L., Song, X. G. Fracture toughness evolution induced by hydrogen of TA10 titanium alloy welded joints. Chin. J. Mech. Eng. 2020, 56, 54–60. https://doi.org/10.3901/jme.2020.16.054. 2. Liu, C., Deng, C. Y., Gong, B. M., Zhang, C. Z., Liu, C., Liu, Y. Effect of microstructure inhomogeneity on mechanical properties of different zones in TA15 electron beam welded joints. Trans. Nonferrous Met. Soc. China 2020, 30, 678–687. https://doi.org/10.1016/s1003-6326(20)65245-1. 3. Suárez Fernández, D., Wynne, B. P., Crawforth, P., Jackson, M. Titanium alloy microstructure fingerprint plots from in-process machining. Mater. Sci. Eng. A 2021, 811, 141074. https://doi.10.1016/j.msea.2021.141074. 4. Callegari, B., Oliveira, J. P., Aristizabal, K., Coelho, R. S., Brito, P. P., Wu, L., Schell, N., Soldera, F. A., Mücklich, F., Pinto, H. C. In-situ synchrotron radiation study of the aging response of Ti-6Al-4V alloy with different starting microstructures. Mater. Charact. 2020, 165, 110400. https://doi.10.1016/j.matchar.2020.110400. 5. Callegari, B., Oliveira, J. P., Coelho, R. S., Brito, P. P., Schell, N., Soldera, F. A., Mücklich, F., Sadik, M. I., García, J. L., Pinto, H. C. New insights into the microstructural evolution of Ti-5Al-5Mo-5V-3Cr alloy during hot working. Mater. Charact. 2020, 162, 110180. https://doi.10.1016/j.matchar.2020.110180.
|
|