[1] [1] Schlienger E, Dimos D, Griffith M, et al. Near net shape production of metal components using LENS[R]. Albuquerque: Office of Scientific & Technical Information, 1998: 1581-1586.

[2] [2] Wu X, Mei J. Near net shape manufacturing of components using direct laser fabrication technology[J]. Journal of Materials Processing Technology, 2003, 135(2-3): 266-270.

[3] [3] Qi H, Azer M, Singh P. Adaptive toolpath deposition method for laser net shape manufacturing and repair of turbine compressor airfoils[J]. The International Journal of Advanced Manufacturing Technology, 2010, 48(1): 121-131.

[4] [4] Qi Huan. Review of INCONEL 718 alloy: Its history, properties, processing and developing substitutes[J]. Journal of Materials Engineering, 2012(8): 92-100.

[5] [5] Liu Fencheng, Lin Xin, Yu Xiaobin, et al. Evolution of interface and crystal orientation of laser solid formed GH4169 superalloy during recrystallization[J]. Acta Metallurgica Sinica, 2014, 50(4): 463-470.

[6] [6] Gao Shoulei, Zhai Qijie, Qi Feipeng, et al. Application and development of high-intensity ultrasonic in solidification process of metals[J]. Materials Review, 2002, 16(9): 5-6.

[7] [7] Fan Jinhui, Zhai Qijie. Effects of physical fields on solidification structure of metals[J]. The Chinese Journal of Nonferrous Metals, 2002, 12(s1): 11-17.

[8] [8] Chen Changyuan, Deng Qilin, Song Jianli. The influence of ultrasonic vibration on the process of laser cladding[J]. Electromachining & Mould, 2005(3): 37-40.

[9] [9] Tatkhoa D, Li Dichen, Lu Bingheng, et al. Effect of scanning methods on the cracking of the DZ125L superalloy in laser direct metal forming[J]. Chinese J Lasers, 2012, 39(10): 1003002.

[10] [10] Lu Changliang, Hu Fangyou, Hu Bin, et al. Effects of ultrasonic vibration on residual stress of K418 alloy plate treated by laser remelting[J]. Metal Materials and Metallurgy Engineering, 2012, 40(5): 7-11.

[12] [12] Armstrong R W. The influence of polycrystal grain size on several mechanical properties of materials[J]. Metallurgical and Materials Transactions, 1970, 1(5): 1169-1176.