Effect of Ru additions on very high temperature creep properties of a single crystal Ni-based superalloy

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	Effect of Ru additions on very high temperature creep properties of a single crystal Ni-based superalloy
	X. P. Tan; J. L. Liu; T. Jin; Z. Q. Hu; H. U. Hong; B. G. Choi; I. S. Kim; C. Y. Jo; D. Mangelinck
	2013
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	580 页码:21-35
摘要	The creep deformation of three single crystal Ni-based superalloys with various Ru contents has been investigated to clarify the effect of Ru additions at very high temperatures and low stresses conditions. The creep properties were significantly improved by Ru additions under the conditions of 1150 degrees C/100 MPa and 1180 degrees C/70 MPa. It is noted that obvious gamma' phase dissolution occurs during the entire creep deformation at very high temperatures. It differs from the typical high-temperature creep curves that a short incubation period occurs before the primary creep stage during the creep deformation at very high temperatures. Ru additions are able to produce denser interfacial dislocation networks and improve the stability and homogeneous configuration of interfacial dislocations; and promote the high-temperature stability of gamma' phase and formation of perfect gamma' rafting. It is thus shown that Ru additions reduce the minimum creep rate, and prolong the secondary creep stage accordingly. The topological inversion of gamma/gamma', microstructure did not occur under both conditions. The origin of the rapid increase of creep rate is closely relevant to the unstable propagation of micro-cracks in the vicinity of porosity in necked regions. (C) 2013 Elsevier B.V. All rights reserved.
部门归属	[tan, x. p. ; liu, j. l. ; jin, t. ; hu, z. q.] chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china. [tan, x. p. ; choi, b. g. ; kim, i. s. ; jo, c. y.] korea inst mat sci, high temp mat res grp, chang won 641831, gyeongnam, south korea. [tan, x. p. ; mangelinck, d.] univ aix marseille, cnrs, im2np, umr 7334, f-13397 marseille 20, france. [hong, h. u.] changwon natl univ sarim dong, dept mat sci & engn, chang won 641773, gyeongnam, south korea. ; tan, xp (reprint author), univ aix marseille, cnrs, im2np, umr 7334, av escadrille normandie niemen,case 142, f-13397 marseille 20, france. ; xptan1985@gmail.com
关键词	Ni-based Superalloy Ru Creep Deformation Interfacial Dislocation Gamma' Rafting Nickel-based Superalloy Gamma/gamma'-microstructure Nonisothermal Creep Behavior Ruthenium Kinetics Phase Interdiffusion Precipitation Suppression
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71491
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. P. Tan,J. L. Liu,T. Jin,et al. Effect of Ru additions on very high temperature creep properties of a single crystal Ni-based superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2013,580:21-35.
APA	X. P. Tan.,J. L. Liu.,T. Jin.,Z. Q. Hu.,H. U. Hong.,...&D. Mangelinck.(2013).Effect of Ru additions on very high temperature creep properties of a single crystal Ni-based superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,580,21-35.
MLA	X. P. Tan,et al."Effect of Ru additions on very high temperature creep properties of a single crystal Ni-based superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 580(2013):21-35.