Infrared Brazing Ti50Ni50 and Invar Using Ag-Based Filler Foils

Shiue, Ren-Kae; Chang, Yun-Hsuan; Wu, S.K.

doi:10.1007/s11661-013-1902-9

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…Figure 5a,b indicate the area on the Ti 50 Ni 50 side and that on 316L SS side, respectively. In Figure 5a, a (Cu x Ni 1−x ) 2 Ti intermetallic layer (labelled by B) is formed at the Ti 50 Ni 50 side which is similar to that in Figure 3b [6,20,22]. The silver penetrated into the (Cu x Ni 1−x ) 2 Ti layer is also observed.…”

Section: Materials Used and Experimental Proceduressupporting

confidence: 60%

“…To evaluate joint strength of the brazed sample in this study, shear tests were conducted with three specimens being performed in each brazing condition. According to our past experience, a double lap joint of 316L SS/Ti 50 Ni 50 /316L SS was used in shear test [21,22]. A Shimadzu universal testing machine with AG-10 model was used to conduct shear tests with a strain rate of 0.0167 mm/s.…”

Section: Materials Used and Experimental Proceduresmentioning

confidence: 99%

“…The alloys' joining brazed by an infrared power source can quickly heat up the specimen with a maximum heating rate of 50 • C/s, and it is much faster than that of ordinary electric furnace [21,22]. Under the condition of temperature being precisely controlled, the joining process by infrared brazing is quite suitable to investigate the early-stage evolution of the reaction kinetics exhibited in the brazed joint.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Infrared Dissimilar Joining of Ti50Ni50 and 316L Stainless Steel with Copper Barrier Layer in between Two Silver-Based Fillers

Shiue

Yang

et al. 2017

Metals

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Infrared dissimilar joining Ti 50 Ni 50 and 316L stainless steel using Cu foil in between Cusil-ABA and BAg-8 filler metals has been studied. The Cu foil serves as a barrier layer with thicknesses of 70 µm and 50 µm, and it successfully isolates the interfacial reaction between Ti and Fe at the 316L SS (stainless steel) substrate side. In contrast, the Cu foil with 25 µm in thickness is completely dissolved into the braze melt during brazing and fails to be a barrier layer. A layer of (Cu x Ni 1−x ) 2 Ti intermetallic is formed at the Ti 50 Ni 50 substrate side, and the Cu interlayer is dissolved into the Cusil-ABA melt to from a few proeutectic Cu particles for all specimens. For the 316L SS substrate side, no interfacial layer is observed and (Ag, Cu) eutectic dominates the brazed joint for 70 µm/50 µm Cu foil. The average shear strength of the bond with Cu barrier layer is greatly increased compared with that without Cu. The brazed joints with a 50 µm Cu layer demonstrate the highest average shear strengths of 354 MPa and 349 MPa for samples joined at 820 • C and 850 • C, respectively. Cracks are initiated/propagated in (Ag, Cu) eutectic next to the 316L substrate side featured with ductile dimple fracture. It shows great potential for industrial application.

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Section: Materials Used and Experimental Proceduressupporting

confidence: 60%

Section: Materials Used and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Infrared Dissimilar Joining of Ti50Ni50 and 316L Stainless Steel with Copper Barrier Layer in between Two Silver-Based Fillers

Shiue

Yang

et al. 2017

Metals

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“…A symmetrical double lap joint, Inconel 600/Ti 50 Ni 50 /Inconel 600, was used for shear testing of the brazed joint, as in previous studies. 12,14) Shear tests were conducted using a Shimadzu AG-10 universal testing machine (Shimadzu Corp., Nakagyo-ku, Kyoto, Japan) with a constant crosshead speed of 0.0167 mm/s. Cross-sections of infrared brazed joints were examined using a NOVA NANO 450 eld-emission scanning electron microscope (FESEM) (FEI Corp., Oregon, USA) equipped with an energy-dispersive spectrometer (EDS).…”

Section: Methodsmentioning

confidence: 99%

Interfacial Reaction and Bonding Strength of Ti<sub>50</sub>Ni<sub>50</sub> and Inconel 600 Dissimilar Brazed Joints

Shiue

Liu

et al. 2017

Mater. Trans.

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The interfacial reaction and shear strength of Ti 50 Ni 50 SMA and Inconel 600 alloy infrared brazed with a gold-based ller metal Au-22Ni-8Pd (BAu-6) were investigated. The shear strengths of Ti 50 Ni 50 /Au-22Ni-8Pd/Inconel 600 joints brazed for 180 s and 300 s were as high as 387 MPa and 527 MPa, respectively. Cracks initiated and propagated along the interface between Ti(Ni,Au) 3 /TiNiAu eutectic and/or TiNi 2 Au layer. The joints show high potential for industrial applications.

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“…As mentioned above, we selected 80/16/4 wt.% Ag-Cu-Zn as the brazing filler alloy, a common metalsmithing material with a melting point of  743 C. This metal falls in a general category of high-silvercontent brazing fillers, known for its high wetting on irongroup metals without significantly penetrating the base structure via diffusion [20,23,32,43,44]. These characteristics of the filler preserve the properties of the structural Invar-36 material, such as the CTE, strength and stiffness, to a significant extent.…”

Section: Brazing-clip and Flux Placingmentioning

confidence: 99%

Clip-brazing for the design and fabrication of micronewton-resolution millimeter-scale force sensors

Singer¹,

Chang²,

Calderón³

et al. 2019

Smart Mater. Struct.

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We present clip-brazing as a new method to construct millimeter-to-centimeter-scale metal structures with micron-scale precision that is fast, scalable and extremely low-cost. Small structures with demanding requirements on both dimensional tolerances and dynamic force responses to time-varying loads are difficult to fabricate and expensive to iteratively prototype. The technique introduced here enables precise placement of strong metallic brazed bonds to create 3D structures with micrometric accuracy, which in this work is exemplified through the design and construction of a broadband micronewton-resolution force-sensing device. The fabrication method uses tensioned clips made from a silver brazing alloy wire to accurately place and control the volume of the metal that joins and supports the pieces that compose the microstructures. The use of clips also allows the simultaneous fusion of all the connections in the structure during a single heating sequence, reducing tolerance stack-up. To analyze the quality and strength of the brazes, we employed scanning electron microscopy (SEM) on cross-sections and tensile testing on dogbone-shaped sample pieces, respectively. After proper calibration, the functionality of the constructed micro-force-sensing system was analyzed and demonstrated using constant a priori known weights and the vertical periodic forces produced by an 83 mg flapping-wing microrobot (including a 3 mg attachment truss). The static tests, in combination with solid-mechanics analyses and simulations based on finite-element analysis (FEA), provide compelling evidence of the high accuracy and precision of the force sensing system for frequencies below 167.5 Hz. Furthermore, the shape characteristics and average values of the measured periodic signals are compared to computational fluid dynamics (CFD) simulations and validated for two sets of flapping angles across the frequency range from 55 to 100 Hz. These results validate the proposed approach as a viable tool for microrobotic design and fabrication.

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Infrared Brazing Ti50Ni50 and Invar Using Ag-Based Filler Foils

Cited by 6 publications

References 19 publications

Infrared Dissimilar Joining of Ti50Ni50 and 316L Stainless Steel with Copper Barrier Layer in between Two Silver-Based Fillers

Infrared Dissimilar Joining of Ti50Ni50 and 316L Stainless Steel with Copper Barrier Layer in between Two Silver-Based Fillers

Interfacial Reaction and Bonding Strength of Ti<sub>50</sub>Ni<sub>50</sub> and Inconel 600 Dissimilar Brazed Joints

Clip-brazing for the design and fabrication of micronewton-resolution millimeter-scale force sensors

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