Investigation of formation and microstructure of Ti-6Al-4V weld bead during pulse ultrasound assisted TIG welding

被引：48

作者：

Chen, Chao ^{[1
]}

Fan, Chenglei ^{[1
]}

Cai, Xiaoyu ^{[1
]}

Lin, Sanbao ^{[1
]}

Liu, Zeng ^{[1
]}

Fan, Qingkai ^{[1
]}

Yang, Chunli ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, 912,92 Xidazhi St, Harbin 150001, Heilongjiang, Peoples R China

来源：

JOURNAL OF MANUFACTURING PROCESSES | 2019年 / 46卷

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Pulse ultrasound assisted TIG welding; Ti-6Al-4V; Alloy; Weld formation; Microstructure; MECHANICAL-PROPERTIES; ALLOY; METAL; IMPROVEMENT; REFINEMENT; TAGUCHI; STEEL;

D O I：

10.1016/j.jmapro.2019.09.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The formation and microstructure of TC4 weld bead was investigated by using pulse ultrasound assisted TIG welding (PU-TIG). The results showed that weld penetration and weld width in the PU-TIG were increased by around 46% and 27%, separately, compared with that of the TIG. The grain sizes in the PU-TIG were smaller than that of the TIG. The minimum grain diameter of 148 mu m was obtained in the PU-TIG of 10Hz, which was decreased by about 0.5 time compared with that of the TIG. The average hardness of TIG weld seam was about 348HV. In the PU-TIG, the average hardness of the weld seam was about 370HV. Compared with the continuous ultrasonic assisted TIG (U-TIG), ultrasonic efficiency was obviously improved in the PU-TIG.

引用

页码：241 / 247

页数：7

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