TRANSFORMATION KINETICS AND COARSENING OF LAMELLAR STRUCTURE IN γ-TiAl ALLOY

Acta Metall Sin

1994, Vol. 30

Issue (3): 117-123 DOI:

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TRANSFORMATION KINETICS AND COARSENING OF LAMELLAR STRUCTURE IN γ-TiAl ALLOY

TIAN Huahang;HUANG Zheng;CHEN Changqi(Beijing University of Aeronautics and Astronautics); LIN Jianguo(University of Xiang tan)(Manuscript received 5 April;1993;in revised form 28 September;1993)

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TIAN Huahang;HUANG Zheng;CHEN Changqi(Beijing University of Aeronautics and Astronautics); LIN Jianguo(University of Xiang tan)(Manuscript received 5 April;1993;in revised form 28 September;1993). TRANSFORMATION KINETICS AND COARSENING OF LAMELLAR STRUCTURE IN γ-TiAl ALLOY. Acta Metall Sin, 1994, 30(3): 117-123.

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Abstract Transformation mechanism and discontinuous coarsening of lamellar structure were studied by cooling Ti-47.8at.-%Al alloy fromα region to room temperature and then aging in the two phase region.The lamellar transformation process relates to aging temperature and cooling rate,at which α_2 single phase forms. A model of lamellar transformation kinetics was developed.The stability of lamellae decreases with decreasing interlamellar spacing and discontinuous coarsening occurres during aging.Correspondent:TIAN Huahang,assistant,Laboratory No.8,Department No.1,Beijing University of Aeronautics and Astronautics,Beijing 100083

Key words: γ-TiAl alloy lamellar structure kinetics discontinuous coarsening

Received: 18 March 1994

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1994/V30/I3/117

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