Effect of hafnium on creep behavior of a corrosion resistant nickel base superalloy

IMR OpenIR

	Effect of hafnium on creep behavior of a corrosion resistant nickel base superalloy
	J. S. Hou; J. T. Guo; Y. X. Wu; L. Z. Zhou; H. Q. Ye
	2010
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	527 期号:6 页码:1548-1554
摘要	The effect of the selective additions of hafnium (Hf) on the variation of creep life and microstructure of an experimental nickel base superalloy has been investigated. Artificial neural networks (ANNs) were utilized to predict the effect of Hf content on the creep rupture life at temperatures of 850-950 degrees C and showed that, with the addition of Hf, the creep life was prolonged. This effect was more pronounced at low stress than at high stress and was most noticeable with the first 0-0.6 wt% of Hf addition. Analysis of the correlation between microstructure and creep life of 0.4 wt% Hf doped alloy revealed that at low stresses the initiation and propagation of microcracks from MC carbides was retarded, and the beneficial effect of grain boundary strengthening on creep life was significant, although the tendency of appearance of gamma' rafting in 0.4 wt% Hf doped alloy is very close to that in Hf-free alloy. This was in agreement with above ANNs prediction. In addition, the relationship between the appearance of gamma' rafting and lattice misfit with regards to Hf content was discussed. (C) 2009 Elsevier B.V. All rights reserved.
部门归属	[hou, j. s.; guo, j. t.; zhou, l. z.; ye, h. q.] chinese acad sci, inst met res, shenyang, peoples r china. [wu, y. x.] anhui univ technol, inst mol engn & appl chem, maanshan, anhui, peoples r china.;hou, js (reprint author), chinese acad sci, inst met res, shenyang, peoples r china;jshou@imr.ac.cn
关键词	Creep Life Artificial Neural Networks Microstructure Superalloy Rafting Lattice Misfit X-ray Prediction Alloys Microstructure
URL	查看原文
WOS记录号	WOS:000275778900033
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31152
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. S. Hou,J. T. Guo,Y. X. Wu,et al. Effect of hafnium on creep behavior of a corrosion resistant nickel base superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2010,527(6):1548-1554.
APA	J. S. Hou,J. T. Guo,Y. X. Wu,L. Z. Zhou,&H. Q. Ye.(2010).Effect of hafnium on creep behavior of a corrosion resistant nickel base superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(6),1548-1554.
MLA	J. S. Hou,et al."Effect of hafnium on creep behavior of a corrosion resistant nickel base superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.6(2010):1548-1554.