Fracture Analysis of Superplastic Diffusion Bonding Joints between Titanium Alloy and Stainless Steel

Min Wang; J.W. Dai; Hong Zhen Guo; C.X. Ma

doi:10.4028/www.scientific.net/MSF.561-565.1011

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Fracture Analysis of Superplastic Diffusion...

Fracture Analysis of Superplastic Diffusion Bonding Joints between Titanium Alloy and Stainless Steel

Abstract:

The microstructure and characteristic of fracture between TC4 titanium alloy and 1Cr18Ni9Ti stainless steel bonding joints were analyzed concretely in this paper. For direct SP/DB of TC4/1Cr18Ni9Ti, the diffusion layer joint was composed of some new phases such as β-Ti, TiFe2, TiFe, σ-FeCr and α-Fe, and the shear strength could be ensured when the thickness of TiFe/TiFe2 brittle phases was controlled within 3~5μm. In SP/DB of TC4/1Cr18Ni9Ti, the joint status of microzone in interface was asymmetric and exhibited different fractograph. The bonding area of fracture could be divided into three zones: similar original interface zone, metallurgical bonding zone and quasi-metallurgical bonding zone. The interface deficiencies were constitutive of mechanical bonding area, cavity and impurity.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

1011-1014

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.1011

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Online since:

October 2007

Authors:

Min Wang, J.W. Dai, Hong Zhen Guo, C.X. Ma

Keywords:

Brittle Phase, Fined Grain, Fracture, Superplastic Diffusion Bonding

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References

[1] Kong Ronglu, Zhang Jiuhai. Aerospace Materials & Technology, Vol. 2 (1997), p.1.

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[2] Fang Zhengchun. Welding Technology, Vol. 4(1997), p.10.

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[3] Y. ckim. Welding International, Vol. 8(11) (1994), p.893 Fig. 5 Fractograph of SP/DB of TC4/Ni/1Cr18Ni9Ti Fig. 6 Bonding defects of SP/DB of TC4/Ni/1Cr18Ni9Ti.

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