MICROSTRUCTURE AND PHASE TRANSFORMATION DURING ANNEALING OF RAPIDLY SOLIDIFIED Al-Fe-Ti-C ALLOY

Acta Metall Sin

1994, Vol. 30

Issue (3): 133-138 DOI:

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MICROSTRUCTURE AND PHASE TRANSFORMATION DURING ANNEALING OF RAPIDLY SOLIDIFIED Al-Fe-Ti-C ALLOY

TONG Xingcun;SHEN Ningfu(Zhengzhou Institute of Technology);LIU Baicheng(Tsinghua University;Beijing)(Manuscript received 3 August;1993:in revised form 6 September 1993)

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TONG Xingcun;SHEN Ningfu(Zhengzhou Institute of Technology);LIU Baicheng(Tsinghua University;Beijing)(Manuscript received 3 August;1993:in revised form 6 September 1993). MICROSTRUCTURE AND PHASE TRANSFORMATION DURING ANNEALING OF RAPIDLY SOLIDIFIED Al-Fe-Ti-C ALLOY. Acta Metall Sin, 1994, 30(3): 133-138.

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Abstract The microstructure and phase transformation during annealing of rapidly solidified Al-Fe-Ti-C alloy have been studied by TEM,EDS and EELS.The initial microstructure consists mostly of α-Al,Al_6Fe particles and a smaller volume fraction of an amorphous phase.During annealing,the amorphous phase transforms into α_T-AlFeSi phase,the globular particles of Al_6Fe growth up and some needle-like Al_3Fe phase precipitates near the α-Al grain boundaries.At 673 K,96 h and 773 K,5 h annealing,the Ti and C dissolved in the α-Al during rapid solidification precipitates as a compound phase of TiC_079.And the formation process of TiC phase was discussed.Correspondent:TONG Xingcun,lecturer,Centre of Malerials Research,Zhengzhou Institute of Technology,Zhengzhou 450002

Key words: rapid solidification Al-Fe-Ti-C alloy microstructure annealing

Received: 18 March 1994

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