Effect of ruthenium on tensile properties of a single crystal Ni-based superalloy

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	Effect of ruthenium on tensile 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
	2012
发表期刊	Metals and Materials International
ISSN	1598-9623
卷号	18 期号:5 页码:769-775
摘要	The tensile properties of two single crystal Ni-based superalloys with and without added Ru (0 and 3 wt%) were investigated under a constant strain rate of 3.3x10(-4) /s at 20 A degrees C, 760 A degrees C, 800 A degrees C and 1000 A degrees C, respectively. The deformation mechanisms could be divided into two temperature regimes. From room temperature to 800 A degrees C, the deformation mechanism is caused by the shearing of gamma' particles by anti-phase boundaries (APB) or stacking faults. At 1000 A degrees C, the deformation mechanism is caused by the bypassing of gamma' particles by dislocations. At 20 A degrees C and 800 A degrees C, gamma' particles were sheared by APB. Due to smaller gamma' particles, the yield strength was decreased with addition of 3 wt% Ru. Additionally, work hardening is less pronounced in the alloy without Ru, hence the ultimate tensile strength was not decreased with the addition of 3 wt% Ru. At 760 A degrees C, gamma' particles were sheared by stacking faults. Since the formation of stacking faults was promoted, the yield strength was decreased due to a 3 wt% Ru addition. However, the ultimate tensile strength was significantly increased when 3 wt% Ru was added. This is due to the markedly stronger work hardening caused by large numbers of stacking faults. At 1000 A degrees C, deformation occurred by dislocations bypassing gamma' particles. Due to wider gamma channels, the yield strength was decreased by 3 wt% Ru addition. Moreover, Alloy 3Ru has smaller gamma' particles and a volume fraction as well as less pronounced work hardening, so the ultimate tensile strength was decreased when 3 wt% Ru was added.
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.; hong, h. u.; choi, b. g.; kim, i. s.; jo, c. y.] korea inst mat sci, high temp mat res grp, chang won 641831, gyeongnam, south korea.;jin, t (reprint author), chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china.;tjin@imr.ac.cn
关键词	Alloys Solidification Strength Tensile Test Microstructure Nickel-based Superalloy Temperature Behavior Mechanisms Phase
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60252
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 ruthenium on tensile properties of a single crystal Ni-based superalloy[J]. Metals and Materials International,2012,18(5):769-775.
APA	X. P. Tan.,J. L. Liu.,T. Jin.,Z. Q. Hu.,H. U. Hong.,...&C. Y. Jo.(2012).Effect of ruthenium on tensile properties of a single crystal Ni-based superalloy.Metals and Materials International,18(5),769-775.
MLA	X. P. Tan,et al."Effect of ruthenium on tensile properties of a single crystal Ni-based superalloy".Metals and Materials International 18.5(2012):769-775.