Title: Effect of arc behavior on Ti-6Al-4V welds during high frequency pulsed arc welding 文章编号: 20170006 作者:
Author(s): Mingxuan Yang, Hao Zheng, Bojin Qi, Zhou Yang
关键词: Keywords: Pulsed arc welding; Ti-6Al-4V; Welds; Mechanical property 文献标识码: 中图分类号: EMAIL: 摘要: Abstract: Pulsed welding (20 kHz, 40 kHz) created arc constriction compared with conventional arc welding (CAW). The core region of the arc plasma increased by 43.7~51.5%, which was considered as the energy concentration. The arc force enhanced by 42.9~57.1%, compared with 2.8 mN of CAW. The arc behavior greatly impacted the characteristics of the Ti-6Al-4V welds. The microstructures and mechanical properties were optimized. The grain size decreased by about 30% in the fusion zone (FZ), and parallel martensite α’ can be found in the coarse grain region (CGR). The elongation increased by 68% (20 kHz) and 38% (40 kHz), and the area reduction rate increased by 180%. Frequencies at 20~40 kHz were found to be the best range for Ti-6Al-4V welding. 页码: 9-15
