Laser Rapid Forming of Ti-Ni Functionally Graded Alloy

Xiao Jing Xu; Xin Lin; Jing Chen; Fei He; Wei Dong Huang

doi:10.4028/www.scientific.net/MSF.561-565.227

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Laser Rapid Forming of Ti-Ni Functionally Graded...

Laser Rapid Forming of Ti-Ni Functionally Graded Alloy

Abstract:

Ti-Ni based functionally graded alloy is a kind of the promising material, which has potential to be used in aero engines. Using laser rapid forming, a Ti-Ni graded alloy with a continuous compositional gradient from pure Ti to Ti-50wt.%Ni were fabricated. On comparison with the graded alloy, a series of homogenous deposits with the typical composition between pure Ti to Ti-50wt.%Ni were also laser rapid formed. The phase evolution along the compositional gradient direction in the graded alloy is: α+β→β+Ti2Ni →(TiNi +Ti2Ni)+ TiNi; and the phase evolution in the corresponding compositional homogeneous deposit is: α+β→ β+(β+Ti2Ni)→ β+Ti2Ni+(β+Ti2Ni)→ (TiNi+Ti2Ni)+TiNi. The phase transformation and microstructural evolution along the compositional gradient were analyzed by using the microstructure selection map.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

227-230

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.227

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Online since:

October 2007

Authors:

Xiao Jing Xu, Xin Lin, Jing Chen, Fei He, Wei Dong Huang

Keywords:

Graded Material, Laser Rapid Forming, Nickel Ni, Titanium (Ti)

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