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	Influence of solidification conditions and alloying elements Re and Ti on micropores formed during homogenization of Ni base single crystal superalloy
	Liu, JL; Meng, J; Yu, JJ; Zhou, YZ; Sun, XF; Liu, JL (reprint author), Chinese Acad Sci, Inst Met Res, Superalloy Div, Shenyang 110016, Liaoning, Peoples R China.
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2018-05-25
卷号	746页码:428-434
关键词	High-temperature Creep X-ray Tomography Nickel Porosity Diffusion Growth Mechanisms Behavior Pores Model
ISSN号	0925-8388
英文摘要	The influence of withdraw rate during directional solidification and elements Re and Ti on the formation of micropores during homogenization in Ni base single crystal superalloy CMSX-4 is investigated by Xray tomography method. The results show that the number of micropores below 5 mm in sample solidified at 10 mm/min after homogenization at 1300 degrees C/3 h is greater than that in the case of 6 mm/min. The number of micropores below 10 mm in Re free and Ti free alloys is rather smaller than that of normal CMSX-4 alloy, while the number of micropores between 15 mm and 25 mm in Ti free alloy is relatively greater than that in Re free alloy. The variation of number of micropores is analyzed based on measurement of primary dendrite arm spacing (PDAS) and segregation ratios of alloying elements, the causes are mainly attributed to reverse segregation tendencies of Re and Ti and their remarkable diffusion coefficient difference, the increasing of PDAS also enhances the propensity of micropores formation during homogenization. (c) 2018 Elsevier B.V. All rights reserved.; The influence of withdraw rate during directional solidification and elements Re and Ti on the formation of micropores during homogenization in Ni base single crystal superalloy CMSX-4 is investigated by Xray tomography method. The results show that the number of micropores below 5 mm in sample solidified at 10 mm/min after homogenization at 1300 degrees C/3 h is greater than that in the case of 6 mm/min. The number of micropores below 10 mm in Re free and Ti free alloys is rather smaller than that of normal CMSX-4 alloy, while the number of micropores between 15 mm and 25 mm in Ti free alloy is relatively greater than that in Re free alloy. The variation of number of micropores is analyzed based on measurement of primary dendrite arm spacing (PDAS) and segregation ratios of alloying elements, the causes are mainly attributed to reverse segregation tendencies of Re and Ti and their remarkable diffusion coefficient difference, the increasing of PDAS also enhances the propensity of micropores formation during homogenization. (c) 2018 Elsevier B.V. All rights reserved.
学科主题	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National Natural Science Foundation of China [1671188, 51601192]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79301]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, JL (reprint author), Chinese Acad Sci, Inst Met Res, Superalloy Div, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Liu, JL,Meng, J,Yu, JJ,et al. Influence of solidification conditions and alloying elements Re and Ti on micropores formed during homogenization of Ni base single crystal superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,746:428-434.
APA	Liu, JL,Meng, J,Yu, JJ,Zhou, YZ,Sun, XF,&Liu, JL .(2018).Influence of solidification conditions and alloying elements Re and Ti on micropores formed during homogenization of Ni base single crystal superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,746,428-434.
MLA	Liu, JL,et al."Influence of solidification conditions and alloying elements Re and Ti on micropores formed during homogenization of Ni base single crystal superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 746(2018):428-434.

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