| 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. |
| 刊名: | JOURNAL OF ALLOYS AND COMPOUNDS |
| Appears in Collections: | 中国科学院金属研究所_期刊论文
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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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