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

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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)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1011-1014

Citation:

M. Wang et al., "Fracture Analysis of Superplastic Diffusion Bonding Joints between Titanium Alloy and Stainless Steel", Materials Science Forum, Vols. 561-565, pp. 1011-1014, 2007

Online since:

October 2007

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$38.00

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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.