Dissimilar joining of TiAl alloy and Ni-based superalloy by laser welding technology using V/Cu composite interlayer
Dissimilar joining of TiAl alloy and Ni-based superalloy by laser welding technology using V/Cu composite interlayer
复制标题
V/Cu复合中间层激光焊接技术TiAl合金与镍基高温合金的异种连接
DOI：
10.1016/j.optlastec.2018.09.053
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发表时间：
2019-04-01
影响因子：
5
通讯作者：
Shen, Chengjie
中科院分区：
文献类型：
--
作者：
Cai, Xiaolong;Sun, Daqian;Shen, Chengjie
TiAl合金与镍基高温合金的连接在航空航天、汽车等领域有着广泛的应用前景。研究了TiAl合金与镍基高温合金通过V/Cu复合中间层激光焊接的可行性。对接头进行了详细的显微组织表征、力学性能和断裂行为分析。与未添加中间层的接头相比，添加V/Cu复合中间层可显著减少脆性相的形成，消除随后的裂纹，提高接头的力学性能。室温和高温（873 K）抗拉强度分别为230 MPa（达到TiAl母材的60%左右）和145 MPa。研究结果表明，添加V/Cu复合中间层对TiAl/Ni基高温合金的激光焊接是非常有效的。
Joining TiAl alloy to Ni-based superalloy is of great interest for applications in aerospace and automobile field. In present study, we report the feasibility of TiAl alloy to Ni-based superalloy welding through V/Cu composite interlayer carried out by laser. Detailed microstructural characterization, mechanical properties and fractured behavior of the joints were performed. The V/Cu composite interlayer remarkably decreased the formation of brittle phases and eliminated subsequent cracking compared with no interlayer and eventually improvement of mechanical properties of the joints. The tensile strength of room temperature and high temperature (873 K) were 230 MPa (reaching about 60% of the TiAl base metal) and 145 MPa, respectively. The study results indicate that insertion of V/Cu composite interlayer is very useful for laser welding of TiAl/Ni-based superalloy.