Creep deformation of a nickel-based single crystal superalloy under high stress at 1033 K

IMR OpenIR

	Creep deformation of a nickel-based single crystal superalloy under high stress at 1033 K
	Qi, DQ; Wang, D; Du, K; Qi, Y; Lou, LH; Zhang, J; Ye, HQ; Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Wang, D (reprint author), Chinese Acad Sci, Superalloys Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
	2018-02-25
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	735 页码:813-820
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.; 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.
部门归属	[qi, dongqing ; qi, yang ; ye, hengqiang] northeastern univ, inst mat sci & engn, shenyang 110819, liaoning, peoples r china ; [qi, dongqing ; du, kui ; zhang, jian ; ye, hengqiang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, liaoning, peoples r china ; [wang, dong ; lou, langhong ; zhang, jian] chinese acad sci, superalloys div, inst met res, shenyang 110016, liaoning, peoples r china
关键词	Anisotropic Creep Stacking-faults Fracture Mechanism Gamma-phase Temperature Shearing Cmsx-4 Behavior Lattice Alloys
学科领域	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	Natural Sciences Foundation of China [51390473, 11332010, 51101160, 51631008]; Special Funds for the Major State Basic Research Projects of China [2010CB631206]
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79487
专题	中国科学院金属研究所
通讯作者	Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Wang, D (reprint author), Chinese Acad Sci, Superalloys Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	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.
APA	Qi, DQ.,Wang, D.,Du, K.,Qi, Y.,Lou, LH.,...&Wang, D .(2018).Creep deformation of a nickel-based single crystal superalloy under high stress at 1033 K.JOURNAL OF ALLOYS AND COMPOUNDS,735,813-820.
MLA	Qi, DQ,et al."Creep deformation of a nickel-based single crystal superalloy under high stress at 1033 K".JOURNAL OF ALLOYS AND COMPOUNDS 735(2018):813-820.