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| AN INVESTIGATION OF MAGNETIC Ni-Fe-Mo AND Ni-Fe-Nb ALLOYS |
| Xu Wenchong;Wang Junjian;Su Xiujin;Li Zhihua Beijing Institute of Iron and Steel Research |
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Cite this article:
Xu Wenchong;Wang Junjian;Su Xiujin;Li Zhihua Beijing Institute of Iron and Steel Research. AN INVESTIGATION OF MAGNETIC Ni-Fe-Mo AND Ni-Fe-Nb ALLOYS. Acta Metall Sin, 1979, 15(2): 252-311.
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Abstract An investigation of the structures of Ni-Fe-Mo and Ni-Fe-Nb alloys has beencarried out by means of TEM supplemented by electron diffraction and X-ray dif-fraction analysis. The results obtained have been correlated with magnetic proper-ties as follows: Both alloys showed modulated structures, in which the Ni-Fe-Nb alloy beingcoarser and more predominant. As the proportion of modulated structures increases,the hardness of the alloy also increases, but vice versa in the case of its mag-netic permeability. The introduction of solute atoms Mo and Nb would lower the degree of or-dering in Ni_3Fe alloy, but fortunately only certain degree of ordering was sufficientto yield conditions for high permeability. A preprecipitating phase possessing thefcc (ordered) Ni_3Nb (γ′) structure and being coherent with the matrix,was observ-ed in the Ni-Fe-Nb alloy. This phase appears to promote the formation of modu-lated structures and exert a strengthening effect on matrix.
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Received: 18 February 1979
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