Effect of Carbide Characteristics on Damage of Cold Deformed GH3536 Alloy and Its Control
Received date: 2022-03-07
Revised date: 2022-05-03
Online published: 2022-10-26
Supported by
National Natural Science Foundation of China(92160201)
GH3536 alloy is a solid solution-strengthened superalloy for aero-engines. In general, this alloy is cold rolled into thin strips and used in honeycomb structures in engine sealing systems. During cold deformation of GH3536 alloy, a microstructural damage caused by carbide particles is the focus of attention. Therefore, understanding the influence of carbides on the cold deformation damage of GH3536 alloy is necessary to control such a phenomenon. Carbide cracking and local cracking of the matrix was observed through cold rolling deformation of thin strips and compression deformation of cylindrical specimens. Combined with finite element simulation results, the effect of carbide morphology and distribution characteristics on the microstructural damage was further discussed. Results show that when carbides are larger in size, irregular in shape, and distributed in agglomeration, the internal stress and fracture tendency are larger, which is contrary to small circular carbides. The agglomeration and banded distribution of carbides primarily increase matrix stress and cracking tendency. The heat treatment results show that the agglomeration and banded distribution characteristics of small carbides can be significantly improved by increasing the solution/annealing heat treatment temperature above 1150oC, but the effect is not evident for large carbides above 10 μm.
Key words： GH3536 alloy; cold deformation; heat treatment; carbide fracture
YU Hua , LI Xin , JIANG He , YAO Zhihao , DONG Jianxin . Effect of Carbide Characteristics on Damage of Cold Deformed GH3536 Alloy and Its Control[J]. Acta Metall Sin, 2024 , 60(4) : 464 -472 . DOI: 10.11900/0412.1961.2022.00094
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