Effect of substrate cooling on the epitaxial growth of Ni-based single-crystal superalloy fabricated by direct energy deposition
作者： Jianwen Nie , Chaoyue Chen , Longtao Liu , Xiaodong Wang , Ruixin Zhao
DOI: 10.1016/J.JMST.2020.05.041
关键词:
摘要: The columnar-to-equiaxed transition (CET) or the formation of stray grains in the laser melting deposition is the least desirable for the repair of single-crystal blades. In this work, the forced water-cooling was conducted on a single-crystal René N5 substrate during the direct energy deposition (DED). The single track remelting, one-layer, two-layer, and eight-layer depositions were investigated to explore the grain growth mechanism. The solidification conditions of the DED process, including temperature field, temperature …
sci-hub.st 参考文章(32)
T.D. Anderson, J.N. DuPont, T. DebRoy, Origin of stray grain formation in single-crystal superalloy weld pools from heat transfer and fluid flow modeling Acta Materialia. ,vol. 58, pp. 1441- 1454 ,(2010) , 10.1016/J.ACTAMAT.2009.10.051
Zhiwei Guo, Shuo Yin, Zhongdong Qian, Hanlin Liao, Sai Gu, Effect of the deviation of the current density profile center on the three-dimensional non-transferred arc plasma torch Computers & Fluids. ,vol. 114, pp. 163- 171 ,(2015) , 10.1016/J.COMPFLUID.2015.03.003
Zhaoyang Liu, Huan Qi, Numerical Simulation of Transport Phenomena for a Double-Layer Laser Powder Deposition of Single-Crystal Superalloy Metallurgical and Materials Transactions A. ,vol. 45, pp. 1903- 1915 ,(2014) , 10.1007/S11661-013-2178-9
Y. C. Wang, S. X. Li †, L. Zhou, S. H. Ai, F. Liu, H. Zhang, Z. G. Wang, Microstructures of a single-crystal nickel-base superalloy after thermo-mechanical fatigue Philosophical Magazine. ,vol. 84, pp. 3335- 3351 ,(2004) , 10.1080/14786430412331283064
N. Matan, D.C. Cox, C.M.F. Rae, R.C. Reed, On the kinetics of rafting in CMSX-4 superalloy single crystals Acta Materialia. ,vol. 47, pp. 2031- 2045 ,(1999) , 10.1016/S1359-6454(99)00093-2
M Gäumann, S Henry, F Cléton, J.-D Wagnière, W Kurz, Epitaxial laser metal forming: analysis of microstructure formation Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 271, pp. 232- 241 ,(1999) , 10.1016/S0921-5093(99)00202-6
L. Wang, N. Wang, W.J. Yao, Y.P. Zheng, Effect of substrate orientation on the columnar-to-equiaxed transition in laser surface remelted single crystal superalloys Acta Materialia. ,vol. 88, pp. 283- 292 ,(2015) , 10.1016/J.ACTAMAT.2015.01.063
T. D. Anderson, J. N. DuPont, T. DebRoy, Stray Grain Formation in Welds of Single-Crystal Ni-Base Superalloy CMSX-4 Metallurgical and Materials Transactions A. ,vol. 41, pp. 181- 193 ,(2010) , 10.1007/S11661-009-0078-9
Takao Murakumo, Toshiharu Kobayashi, Yutaka Koizumi, Hiroshi Harada, Creep behaviour of Ni-base single-crystal superalloys with various γ' volume fraction Acta Materialia. ,vol. 52, pp. 3737- 3744 ,(2004) , 10.1016/J.ACTAMAT.2004.04.028
L. Wang, N. Wang, Effect of substrate orientation on the formation of equiaxed stray grains in laser surface remelted single crystal superalloys: Experimental investigation Acta Materialia. ,vol. 104, pp. 250- 258 ,(2016) , 10.1016/J.ACTAMAT.2015.11.018