Microstructure and Properties of Welded Joints of Low Density Niobium Alloy

作者：Bai Run^*; Zheng Xin; Cai Xiaomei; Wang Feng; Xia Mingxing; Liu Hui; Li Laiping

来源：Rare Metal Materials and Engineering, 2016, 45(5): 1302-1307.

• low density niobium alloy
• titanium alloy
• high strength niobium alloy
• electronic beam welding
• mechanical properties

The microstructure and properties of the joints of low density niobium alloy (LDNb) with itself, high strength niobium alloy Nb521 and high temperature titanium alloy TC4 welded by the electronic beam welding (EBW) was investigated. For different alloys, electronic beam was deviated to the side of higher melting point alloy. The corresponding current, welding speed and deflection distance were also adjusted. The results show that the welded joints are smooth with good tensile strength. The plasticity of the joints welded with itself, LDNb or Nb521 are consistent with that of the base alloy. The ultimate strength of welded joint of LDNb and Nb521 alloy is up to 75.3 MPa at 1100 degrees C, which is close to that of the base alloy.

• 出版日期2016-5
• 单位西北有色金属研究院