DISSOLUTION BEHAVIOR OF CARBIDE IN Ti-60 TITANIUM ALLOYS WITH BIMODAL MICROSTRUCTURE DURING AGEING

Acta Metall Sin

2005, Vol. 41

Issue (9): 969-973 DOI:

Research Articles

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DISSOLUTION BEHAVIOR OF CARBIDE IN Ti-60 TITANIUM ALLOYS WITH BIMODAL MICROSTRUCTURE DURING AGEING

ZHANG Shangzhou; WANG Qingjiang; LIU Yuyin; YANG Rui

School of Environment and Materials Engineering; Yantai University; Yantai 264005

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ZHANG Shangzhou; WANG Qingjiang; LIU Yuyin; YANG Rui. DISSOLUTION BEHAVIOR OF CARBIDE IN Ti-60 TITANIUM ALLOYS WITH BIMODAL MICROSTRUCTURE DURING AGEING. Acta Metall Sin, 2005, 41(9): 969-973 .

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Abstract Dissolution behavior of carbide TiC in Ti-60 alloys with bimodal microstructure during ageing was investigated. Solution treatment in the (α+β) phase field followed by quenching in water resulted in the precipitation of TiC carbide particles, most of which distributed in the β transformed grains and seldom at the interface of the primary α (αp) and β transformed grains or in the αp phase. The (α+β) solution-treated specimens were aged in the temperature range of 750 to 850 ℃. For the carbide precipitate in the β transformed grain, the dissolution of carbide preferentially occurs from the β phase side, leading to the irregular shape of carbide particles and the β phase-poor matrix immediately surrounding the carbide. The carbide in the αp phase dissolves at an uniformly slow rate. The mechanisms of carbide dissolution are discussed in terms of the peritectoid transformation between the β phase and carbide, the movement of dislocations and the influence of curvature.

Key words: Ti-60 titanium alloy carbide dissolution

Received: 07 March 2005

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	ZHANG Shangzhou
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	YANG Rui

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2005/V41/I9/969

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