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题名: Creep deformation of a nickel-based single crystal superalloy under high stress at 1033 K
作者: Qi, DQ;  Wang, D;  Du, K;  Qi, Y;  Lou, LH;  Zhang, J;  Ye, HQ
发表日期: 2018-2-25
摘要: The microstructure of a nickel-based single crystal superalloy has been investigated after creep deformation at 1033 K under stress up to 850 MPa. High density of stacking faults are formed in gamma' precipitates during the creep deformation. At 700 MPa and 850 MPa, bi-directional stacking faults are observed. These stacking faults are induced by the movement of a/3 < 112 > partial dislocations. Two formation mechanisms of a/3 < 112 > partial dislocations, reaction and dissociation mechanisms, are simultaneously observed in this alloy after deformation. The proportion of a/3 < 112 > dislocations formed by the dissociation mechanism increases as the applied stress increases. The primary creep strain of this alloy is 2.45% at 850 MPa, which may be attributed to the combination of these two mechanisms. (C) 2017 Elsevier B.V. All rights reserved.
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Recommended Citation:
Qi, DQ,Wang, D,Du, K,et al. Creep Deformation Of A Nickel-based Single Crystal Superalloy Under High Stress At 1033 K[J]. Journal Of Alloys And Compounds,2018,735:813-820.

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