The Influence of Ni on the Microstructure of Co-Base ODS Alloys

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Co-based ODS alloys strengthened by γ΄ precipitates and nanosized oxides are promising high-temperature structural materials. Single solid solution of Al and W in the matrix can not be achieved after mechanical alloying, resulting in the formation of low volume fraction of γ΄ phase and several kinds of secondary phases. The addition of Ni promotes the precipitation of γ΄ phase and reduces the amount of secondary phases by the enlargement of the solid solution limit of Al and W within the matrix. In comparison with the lower fracture strength and cleavage fracture mode of the alloy without the addition of Ni, Ni-containing Co-base ODS alloys exhibit much higher fracture strength and obvious ductile facture mode.

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Periodical:

Advanced Materials Research (Volumes 535-537)

Edited by:

Chunxiang Cui, Yali Li and Zhihao Yuan

Pages:

1011-1014

Citation:

L. Zhang et al., "The Influence of Ni on the Microstructure of Co-Base ODS Alloys", Advanced Materials Research, Vols. 535-537, pp. 1011-1014, 2012

Online since:

June 2012

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$38.00

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