Effect of carbon content on the microstructure and creep properties of a 3rd generation single crystal nickel-base superalloy

IMR OpenIR

	Effect of carbon content on the microstructure and creep properties of a 3rd generation single crystal nickel-base superalloy
	Li, X. W.; Liu, T.; Wang, L.; Liu, X. G.; Lou, L. H.; Zhang, J.; wangli@imr.ac.cn
	2015
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	639 页码:732-738
摘要	Effect of carbon content on the microstructure and creep properties of a 3rd generation single crystal nickel-base superalloy has been investigated by the scanning electron microscope, X-ray computed tomography and electron probe microanalyzer. With the increase of the carbon content, MC carbides evolve from octahedral to well-developed dendrite, which promotes the formation of microporosity. Moreover, the volume fraction of porosity increases in the experimental alloys after solution heat treatment. As a result, the increase in the size of MC carbides and the porosity has a detrimental effect on the low temperature and high stress creep behavior of the alloys. The specimen crept at 850 degrees C and 586 MPa with the carbon content of 430 ppm shows the shortest rupture life due to the largest primary creep strain. However, the creep behavior of the alloy at 1120 degrees C and 140 MPa gets better as the carbon content increases from 88 to 430 ppm. TCP phase is observed near the fracture surfaces of the alloys, which explores as a potential cause for the creep rupture. However, the formation of TCP phase is effectively suppressed for decreasing segregation of the alloying elements, which results in the improvement of the creep life in the alloy with 430 ppm carbon at 1120 degrees C and 140 MPa. (C) 2015 Elsevier B.V. All rights reserved.
部门归属	[li, x. w. ; liu, t. ; wang, l. ; liu, x. g. ; lou, l. h. ; zhang, j.] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china ; [wang, l. ; zhang, j.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
关键词	Carbides Microporosity X-ray Computed Tomography Creep Property Nickel-base Superalloys
资助者	National Natural Science Foundation of China [51201164]; National High Technology Research and Development Program of China [2012AA03A511]
收录类别	sci
语种	英语
WOS记录号	WOS:000357549200092
引用统计	被引频次：20[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/321006/74739
专题	中国科学院金属研究所
通讯作者	wangli@imr.ac.cn
推荐引用方式 GB/T 7714	Li, X. W.,Liu, T.,Wang, L.,et al. Effect of carbon content on the microstructure and creep properties of a 3rd generation single crystal nickel-base superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,639:732-738.
APA	Li, X. W..,Liu, T..,Wang, L..,Liu, X. G..,Lou, L. H..,...&wangli@imr.ac.cn.(2015).Effect of carbon content on the microstructure and creep properties of a 3rd generation single crystal nickel-base superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,639,732-738.
MLA	Li, X. W.,et al."Effect of carbon content on the microstructure and creep properties of a 3rd generation single crystal nickel-base superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 639(2015):732-738.