Effect of Withdrawal Rates on Microstructure and Creep Strength of a Single Crystal Superalloy Processed by LMC

IMR OpenIR

	Effect of Withdrawal Rates on Microstructure and Creep Strength of a Single Crystal Superalloy Processed by LMC; Effect of Withdrawal Rates on Microstructure and Creep Strength of a Single Crystal Superalloy Processed by LMC
	C. B. Liu; J. Shen; J. Zhang; L. H. Lou
	2010 ; 2010
发表期刊	Journal of Materials Science & Technology ; Journal of Materials Science & Technology
ISSN	1005-0302 ; 1005-0302
卷号	26 期号:4 页码:306-310
摘要	A nickel base single crystal (SC) superalloy was directionally solidified using liquid metal cooling (LMC) process at various withdrawal rates. The microstructure was refined as increasing the withdrawal rate from 3 to 12 mm/min. However, higher withdrawal rate of 15 mm/min induced the formation of stray grains. Size and volume fraction of the eutectics were found to decrease with the increasing in withdrawal rate. After solution heat treatment at 1250 degrees C, un-dissolved eutectic was observed in specimens. High temperature creep rupture life was observed to be very sensitive to the fraction of these remaining eutectics. Creep rupture tests at 1000 degrees C/235 MPa showed that refined microstructure and low fraction of the remaining eutectic lead to significant improvement of the rupture life.; A nickel base single crystal (SC) superalloy was directionally solidified using liquid metal cooling (LMC) process at various withdrawal rates. The microstructure was refined as increasing the withdrawal rate from 3 to 12 mm/min. However, higher withdrawal rate of 15 mm/min induced the formation of stray grains. Size and volume fraction of the eutectics were found to decrease with the increasing in withdrawal rate. After solution heat treatment at 1250 degrees C, un-dissolved eutectic was observed in specimens. High temperature creep rupture life was observed to be very sensitive to the fraction of these remaining eutectics. Creep rupture tests at 1000 degrees C/235 MPa showed that refined microstructure and low fraction of the remaining eutectic lead to significant improvement of the rupture life.
部门归属	[zhang, jian] chinese acad sci, natl lab mat sci, inst met res, shenyang 110016, peoples r china. [liu, chengbao; shen, jian; lou, langhong] chinese acad sci, superalloys div, inst met res, shenyang 110016, peoples r china.;zhang, j (reprint author), chinese acad sci, natl lab mat sci, inst met res, shenyang 110016, peoples r china;jianzhang@imr.ac.cn ; [zhang, jian] chinese acad sci, natl lab mat sci, inst met res, shenyang 110016, peoples r china. [liu, chengbao; shen, jian; lou, langhong] chinese acad sci, superalloys div, inst met res, shenyang 110016, peoples r china.;zhang, j (reprint author), chinese acad sci, natl lab mat sci, inst met res, shenyang 110016, peoples r china;jianzhang@imr.ac.cn
关键词	Eutectic Eutectic Single Crystal Superalloy Single Crystal Superalloy Liquid-metal-cooling Liquid-metal-cooling Withdrawal Withdrawal Rate Rate Ni-base Superalloy Ni-base Superalloy Solidification Solidification
URL	查看原文 ; 查看原文
WOS记录号	WOS:000277698000003 ; WOS:000277698000003
引用统计	被引频次：43[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/321006/31269
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. B. Liu,J. Shen,J. Zhang,et al. Effect of Withdrawal Rates on Microstructure and Creep Strength of a Single Crystal Superalloy Processed by LMC, Effect of Withdrawal Rates on Microstructure and Creep Strength of a Single Crystal Superalloy Processed by LMC[J]. Journal of Materials Science & Technology, Journal of Materials Science & Technology,2010, 2010,26, 26(4):306-310, 306-310.
APA	C. B. Liu,J. Shen,J. Zhang,&L. H. Lou.(2010).Effect of Withdrawal Rates on Microstructure and Creep Strength of a Single Crystal Superalloy Processed by LMC.Journal of Materials Science & Technology,26(4),306-310.
MLA	C. B. Liu,et al."Effect of Withdrawal Rates on Microstructure and Creep Strength of a Single Crystal Superalloy Processed by LMC".Journal of Materials Science & Technology 26.4(2010):306-310.