合金元素Ni对NbCr<sub>2</sub>/Nb合金热稳定性的影响

doi:10.11896/j.issn.1005-023X.2018.14.021

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Abstract The (NbCr₂/Nb)-Ni alloy was prepared by mechanical alloying and hot pressing. The effect of alloying element Ni on thermal stability of the NbCr₂/Nb alloy was studied by the change of the microstructure and properties of the (NbCr₂/Nb)-Ni alloy thermally exposed at 1 200 ℃ for 100 h. The results show that alloying element Ni exists in Laves phase NbCr₂ and it has no apparent phase transformation during the thermal exposure process. The addition of alloying element Ni causes the decrease of the Vickers hardness, the yield strength and the increase of the plastic strain of the NbCr₂/Nb alloy because alloying element Ni can relax the structure of Laves phase by replacing the part position of Cr atoms. During the thermal exposure process, the change of the pro-perties of the NbCr₂/Nb alloy with alloying element Ni, such as Vickers hardness, compressive strength and plastic strain, is significantly smaller than those of the NbCr₂/Nb alloy without alloying element Ni.It can be seen that alloying element Ni can improve the thermal stability of the NbCr₂/Nb alloy.

Key words： NbCr₂/Nb alloy alloying element Ni thermal stability

Published: 31 July 2018

CLC number:

TG146.4

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	Articles by authors
	DENG Liping
	LU Shiqiang
	LIN Yan

Cite this article:

DENG Liping,LU Shiqiang,LIN Yan. Effect of Alloying Element Ni on Thermal Stability of NbCr₂/Nb Alloy[J]. Materials Reports, 2018, 32(14): 2442-2447.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.14.021 OR http://www.mater-rep.com/EN/Y2018/V32/I14/2442

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