Machining and brazing of accelerating RF cavity

Ghodke, S.R.; R.Barnwal,; Mondal, Jayant; Dhavle, A S; Parashar, S.; Kumar, Manoj; Nayak, Susanta; Jayaprakash, D.; Sharma, Vijay; Acharya, S.; Nimje, V.T.; Mittal, K. C.; Dutta, B.K.; Gantayet, L.M.

doi:10.1109/deiv.2014.6961629

Cited by 7 publications

(6 citation statements)

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“…Despite of this, it is reported that, Cu-SS can be joined with the help of different techniques such as shielded metal arc welding (SMAW), Tungsten/metal gas suspended arc welding, brazing, laser beam welding (LBW), electron-beam welding (EBW), hot isostatic pressing (HIP), explosive welding (EW), friction stir welding (FSW), etc. [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The melting of the material causes various problems of solidification cracking, porosity, and residual stresses that triggering premature failure [10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The melting of the material causes various problems of solidification cracking, porosity, and residual stresses that triggering premature failure [10][11][12][13][14][15][16][17][18][19]. Furthermore, LBW and EBW necessitate close control over the parameters which results in a higher degree of complexity [10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The melting of the material causes various problems of solidification cracking, porosity, and residual stresses that triggering premature failure [10][11][12][13][14][15][16][17][18][19]. Furthermore, LBW and EBW necessitate close control over the parameters which results in a higher degree of complexity [10][11][12][13][14][15][16][17][18][19]. Solid-state welding process such as EW involves explosive materials, whereas HIP enforces repetitive heating and cooling cycles [10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, LBW and EBW necessitate close control over the parameters which results in a higher degree of complexity [10][11][12][13][14][15][16][17][18][19]. Solid-state welding process such as EW involves explosive materials, whereas HIP enforces repetitive heating and cooling cycles [10][11][12][13][14][15][16][17][18][19]. It restricts grain growth resulting in heterogeneous joint.…”

Section: Introductionmentioning

confidence: 99%

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Microstructures and Properties of Copper to Stainless Steel Joints by Hybrid FSW

Joshi

Badheka

2017

Metallogr. Microstruct. Anal.

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The present research article is focused to investigate the heating-and cooling-assisted friction stir welding (FSW) on dissimilar copper to stainless steel joints along with normal FSW. Gas tungsten arc welding torch was applied for heating-assisted source in front of the FSW tool, wherein preheating current was varied as 20, 40, and 60 A with rest of constant FSW parameters. Similarly, cooling-assisted FSW was performed by compressed air and water behind the FSW tool for constant FSW parameters, wherein the compressed air flow rate was varied as 15 and 30 PSI and water cooling was applied with 75 ml/ min one after another. Weld properties of assisted approaches were compared with normal FSW on the scale of macrostructure and microstructure analysis, tensile testing, and microhardness properties. The obtained results reveal that the normal FSW of dissimilar copper to stainless steel joint was observed as superior relative to assisted approaches. Surface oxides were observed for the welds of heating-assisted FSW and cooling-assisted FSW of compressed air. Elimination of surface oxides was noted for FSW assisted by water cooling. Highest tensile strength was reported for normal FSW relative to heating-assisted FSW and cooling-assisted FSW. Tensile strength was deteriorated as cooling conditions increase. The microstructures of the stir zone were observed as metal matrix type with Cu matrix and SS particles, wherein SS particles were reported as in random distribution with its varying size. Major defects were reported around the largely dispersed SS particles inside Cu matrix.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructures and Properties of Copper to Stainless Steel Joints by Hybrid FSW

Joshi

Badheka

2017

Metallogr. Microstruct. Anal.

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“…The individual parts must be joined through processes such as brazing, electron beam welding or similar methods to achieve vacuum tightness and maximum electrical conductivity. This multi-stage manufacturing process limits the freedom in design and thus new innovative cavity concepts required for linacs with, for example, lower energy consumption or longer operating times [2,[7][8][9]. Moreover, the conventional manufacturing process is responsible for over 35% of the investment costs for Linacs [10][11][12], which can be significantly reduced through additive manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Improving Fabrication and Performance of Additively Manufactured RF Cavities by Employing Co-Printed Support Structures and Their Subsequent Removal

Mayerhofer,

Brenner,

Doppler

et al. 2024

Instruments

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The enormous potential of additive manufacturing (AM), particularly laser powder bed fusion (L-PBF), to produce radiofrequency cavities (cavities) has already been demonstrated. However, the required geometrical accuracy for GHz TM010 cavities is currently only achieved by (a) avoiding downskin angles <40∘, which in turn leads to a cavity geometry with reduced performance, or (b) co-printed support structures, which are difficult to remove for small GHz cavities. We have developed an L-PBF-based manufacturing routine to overcome this limitation. To enable arbitrary geometries, co-printed support structures are used that are designed in such a way that they can be removed after printing by electrochemical post-processing, which simultaneously reduces the surface roughness and thus maximizes the quality factor Q0. The manufacturing approach is evaluated on two TM010 single cavities printed entirely from high-purity copper. Both cavities achieve the desired resonance frequency and a Q0 of approximately 8300.

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Studies on Tool Shoulder Diameter of Dissimilar Friction Stir Welding Copper to Stainless Steel

Joshi

Badheka

2019

Metallogr. Microstruct. Anal.

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Machining and brazing of accelerating RF cavity

Cited by 7 publications

References 0 publications

Microstructures and Properties of Copper to Stainless Steel Joints by Hybrid FSW

Microstructures and Properties of Copper to Stainless Steel Joints by Hybrid FSW

Improving Fabrication and Performance of Additively Manufactured RF Cavities by Employing Co-Printed Support Structures and Their Subsequent Removal

Studies on Tool Shoulder Diameter of Dissimilar Friction Stir Welding Copper to Stainless Steel

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