7Wang H, Jiang W, Ouyang J, et al. Rapid prototyping of 4043 Al-alloy parts by VP-GTAW[J]. Journal of Materials Processing Technology, 2004, 148( 1 ) :93 - 102.
8Male AT, Chen YW, Pan C, et al. Rapid prototyping of metal components by plasma-jet forming[ J ]. Journal of Materials Processing Technology, 2003, 135 ( 2 - 3 ) : 340 - 346.
9Terakubo, Janghwan Oh, Kirihara S, et al. Freeform fabrication of titanium metal by 3D micro welding[ J]. Materials Science and Engineering A, 2005, 402( 1 -2) :84 -91.
10Zhang YM, Chen Y, Li P, et al. Weld deposition-based rapid prototyping: a preliminary study [ J ]. Journal of Materials Processing Technology, 2003, 135 (2 - 3 ) :347 - 357.