Fracture mechanism of transient liquid phase bonding joint of gamma '-strengthened Co-based single crystal superalloy
Fracture mechanism of transient liquid phase bonding joint of gamma '-strengthened Co-based single crystal superalloy
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DOI：
10.1016/j.matlet.2019.126730
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发表时间：
2020
影响因子：
3
通讯作者：
Zhou Y. Z.
中科院分区：
文献类型：
--
作者：
Wang S. Y.;Sun Y.;Hou X. Y.;Cui C. Y.;Sun X. F.;Zhou Y. Z.
采用瞬时液相连接技术对γ′强化Co基单晶高温合金进行了连接，并采用原位拉伸试验研究了TLP连接接头的断裂过程。结果表明，硼化物诱发裂纹产生于扩散影响区，倾向于停留在母材附近，并逐渐向等温凝固区移动。TLP接头的失效是由于裂纹的聚合，使得扩散影响区的断裂路径相对平坦。
Herein, γ′-strengthened Co-based single crystal superalloy is bonded by a transient liquid phase bonding process and the fracture process of TLP joint is investigated by usingin-situtensile characterization. The results reveal that boride-induced cracks emerged in the diffusion affected zone, which prefer to stay near the base metal and gradually move towards the isothermally solidified zone. The failure of TLP joint occurs due to the coalescence of cracks, rendering a relatively flat fracture path in the diffusion affected zone.