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Accession number: 20151800812325 Title: Effects of Co on the solidification and precipitation behaviors of IN 718 alloy Authors: Xin, Xin1 Email author xxin@imr.ac.cn; Zhang, Wei Hong1 Email author whzhang@imr.ac.cn; Yu, Lian Xu1 Email author lxyu@imr.ac.cn; Liu, Fang1 Email author fangliu@imr.ac.cn; Jia, Dan1 Email author djia@imr.ac.cn; Sun, Wen Ru1 Email author wrsun@imr.ac.cn; Hu, Zhuang Qi1 Email author zqhu@imr.ac.cn Author affiliation: 1 Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, China Corresponding author: Sun, Wen Ru Source title: Materials Science Forum Abbreviated source title: Mater. Sci. Forum Volume: 816 Volume title: High Performance Structural Material Part number: 1 of 1 Issue date: 2015 Publication year: 2015 Pages: 613-619 Language: English ISSN: 02555476 CODEN: MSFOEP ISBN-13: 9783038353959 Document type: Conference article (CA) Conference name: Chinese Materials Congress, CMC 2014 Conference date: July 4, 2014 - July 7, 2014 Conference location: Chengdu, China Conference code: 118109 Publisher: Trans Tech Publications Ltd Abstract: The effects of Co from 0 to 11.60% (in mass fraction) on the solidification and precipitation behaviors of IN 718 alloy had been investigated. The results showed that the volume fraction of the dendrite core increased with the addition of Co. In the alloys with 0-5.84%Co, the addition of Co could restrain the precipitation of blocky Laves phase and promoted the formation of eutectic Laves phase. In the alloys with 9.00-11.60% Co, the eutectic gray phase and small blocky Laves phase precipitated in the interdendritic region. The eutectic gray phase increased and small blocky Laves phase decreased with increasing Co. The parallel lath-like ¦Ä-Ni<inf>3</inf>Nb phase was observed to precipitate in some interdendritic region without the formation of gray phase and Laves phase in the 9.00-11.60% Co alloys. Further research found that Co slightly segregated in the dendrite core and markedly raised the solubility of element Mo in the dendrite core which resulted in reduced Mo in the residual liquid, and consequently, restrained Laves phase while promoted the precipitation of Mo-depleted gray phase and ¦Ä-Ni3Nb phase. Furthermore, Co was seemed to elevate the solidification point of the ¦Ã matrix while decrease that of the Laves phase. © (2015) Trans Tech Publications, Switzerland. Number of references: 7 Main heading: Solidification Controlled terms: Alloys - Cobalt - Cobalt alloys - Eutectics - Precipitation (chemical) Uncontrolled terms: Co alloys - Effects of CO - Interdendritic regions - Laves-phase - Mass fraction - Precipitation behavior - Residual liquid - Solidification points Classification code: 531.1 Metallurgy - 531.2 Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations DOI: 10.4028/www.scientific.net/MSF.816.613 Database: Compendex Compilation and indexing terms, © 2015 Elsevier Inc. |
10Â¥2015-10-29 15:42:33













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