Compression Deformation of a Nickel-Base Single Crystal Superalloy of Different Orientations

Chin J Mater Res

2011, Vol. 25

Issue (4): 355-361 DOI:

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Compression Deformation of a Nickel-Base Single Crystal Superalloy of Different Orientations

MENG Jie¹, JIN Tao^1,2, SUN Xiaofeng¹, HU Zhuangqi¹

1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
2.University of Science and Technology, Beijing 100083

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MENG Jie JIN SUN Xiaofeng HU Zhuangqi. Compression Deformation of a Nickel-Base Single Crystal Superalloy of Different Orientations. Chin J Mater Res, 2011, 25(4): 355-361.

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Abstract A nickel base single crystal superalloy was compressed at room temperature along the <001>, <110> and <111> orientations, respectively. The evolution of the slip traces and the microstructure in the deformation was investigated by metallographic microscope and transmission electron microscope. It was found that compress deformation depends on the crystal orientation and the precedence of the compress yield stress is: <111>, <110>, <001>. For the <001> or <110> oriented specimen compressed 4.5% the slip traces match the octahedral slip, and the slip traces in the <111> oriented alloy prove to slip along the {001} planes. It is noted that deformation of the <110> oriented alloy takes place by activation of two slip systems. The anisotropy of the matrix channel, dendritic segregation and eutectic leads to the change of deformation behavior for various orientations. For the <110> oriented alloy γ’ particles cut by stacking fault. The high dense dislocation of the <111> oriented alloy contributes to its high yield strength.

Key words: metallic materials nickel-base single crystal superalloy compress slip trace anisotropy

Received: 13 August 2010

ZTFLH:

TG146

Fund:

Supported by the National Basic Research Program (973 Program) of China No.2010CB631206, the National Natural Science Foundation of China No.50931004 and State Key Lab of Advanced Metals and Materials No.2008ZD–07.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2011/V25/I4/355

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