定向凝固Cu-0.33Cr-0.1Ti亚共晶合金中带状组织的形成机理

doi:10.11896/j.issn.1005-023X.2018.04.019

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Abstract The directional solidification structures of the Cu-0.33Cr-0.1Ti hypoeutectic alloy at solidified rate of 20 μm/s were investigated. The morphology and composition of the band-like microstructure were analyzed by means of SEM and EDS. The reason and mechanism of formation of band-like microstructure were discussed based on the dynamics, nucleation conditions. The results showed that the band-like microstructures were formed by the alternation of the monocrystalline α-Cu phase and the (α-Cu)+(β-Cr) eutectic structure. The formation of the band-like microstructure was related to the solute distribution at the front of solid-liquid interface, which was mainly affected by solute concentration, effective solute coefficient and solidification rate and other factors.

Key words： directional solidification Cu-0.33Cr-0.1Ti hypoeutectic alloy band-like microstructure solute distribution

Published: 25 February 2018

CLC number:

TG113.12

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	Articles by authors
	LI Yong
	ZHU Jing
	WANG Ying
	LI Huan
	ZHAO Yaru

Cite this article:

LI Yong,ZHU Jing,WANG Ying, et al. Formation Mechanism of Band Structure in Directionally Solidified Cu-0.33Cr-0.1Ti Hypoeutectic Alloy[J]. Materials Reports, 2018, 32(4): 602-605.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.04.019 OR http://www.mater-rep.com/EN/Y2018/V32/I4/602

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