Interfacial microstructures of HIP joined W and ferritic–martensitic steel with Ti interlayers

Jung, Yang‐Il; Park, Jeong-Yong; Choi, Byoung-Kwon; Lee, Dongwon; Cho, Seungyon

doi:10.1016/j.fusengdes.2013.02.049

Cited by 28 publications

(9 citation statements)

References 13 publications

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“…Ti was chosen as a compliant interlayer with the prospect of reducing the stress concentration at the W/Fe interface, caused mainly by the different thermal expansion. Ti was also successfully used in joining of W to steel by hot isostatic pressing (HIP) [31]. The W interlayer was tested because of its expected good adhesion to the substrate and chemical affinity to the sprayed coating (same element).…”

Section: Methodsmentioning

confidence: 99%

“…Different grey levels within the interface layer suggest that diffusion took place between the substrate/layer/coating materials. Unfortunately, the resolution of the EDS analysis was not sufficient to properly examine this area; however, phase diagrams and literature suggest a possible presence of FeTi or Fe 2 Ti at the substrate/layer interface [31,38] and solid solution of W and Ti at the layer/coating interface [39]. Depending on the local surface conditions and the state of impacting particle, interfaces of different qualities were developed.…”

Section: Observations Of Single Splatsmentioning

confidence: 99%

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The Influence of Interface Characteristics on the Adhesion/Cohesion of Plasma Sprayed Tungsten Coatings

et al. 2013

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Abstract:Tungsten is the prime candidate material for plasma facing components of future fusion devices. Plasma spraying, with its ability to coat large areas, including non-planar surfaces, with a significant thickness, is a prospective fabrication technology for components subject to moderate heat loads, e.g., the first wall of the Demonstration Reactor (DEMO). The functionality of such coatings is critically dependent on their adhesion to the underlying material. This in turn, is influenced by a variety of processing-related factors, chief among them being the state of the interface. In this study, the effects of two factors-surface roughness and the presence of thin interlayers-were investigated. Two different levels of roughness of steel substrates were induced by grit blasting, and two thin interlayers-titanium (Ti) and tungsten (W)-were applied by physical vapor deposition prior to plasma spraying of W by a Water Stabilized Plasma (WSP) torch. Coating adhesion was determined by a shear adhesion test. The structures of the coatings and the interfaces, as well as the characteristics of the fractured surfaces, were observed by SEM.

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Section: Methodsmentioning

confidence: 99%

Section: Observations Of Single Splatsmentioning

confidence: 99%

The Influence of Interface Characteristics on the Adhesion/Cohesion of Plasma Sprayed Tungsten Coatings

et al. 2013

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“…The joining of W and RAFMs has been realised mainly by brazing [13][14][15][16][17][18][19][20][21][22][23][24][25]45,46] and solid-state diffusion bonding [16,17,[26][27][28][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Brazing is suitable for joining components with complex geometries.…”

Section: Introductionmentioning

confidence: 99%

“…The effective joining also requires minimal changes in the microstructure and material properties of W and RAFMs. Various joining methods and filler materials have been extensively studied for the fabrication of high-performance W/RAFMs joints [13-46].…”

Section: Introductionmentioning

confidence: 99%

Tungsten/reduced activation ferritic–martensitic steel joints made with an Fe–Si–B amorphous filler

Wang

Lian

Feng

et al. 2021

Materials Science and Technology

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The joining of Tungsten (W) and reduced activation ferritic–martensitic steel (RAFMs) is crucial to the fabrication of divertors in future fusion reactors. In this work, an Fe75.0Si8.33B16.67 (at.-%) amorphous filler and iron interlayer are considered for brazing W and RAFMs. Crack-free joints in both the as-brazed and post joining heat treatment (PJHT) states have been obtained by short-time vacuum brazing at 1230°C. The bonding seams of the joints are composed of an α-Fe matrix, fine FeWB and Fe3B particles. The PJHT joint exhibits a high strength of 310 MPa and room temperature plasticity. The strong and tough joint would be appealing in its thermal cycling and thermal shock performance.

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“…Only one of the combinations showed a bonding zone without formation of new phases in the interface, and it could be concluded that this was determined by the composition of the tool steels. Jung et al 3 reported the microstructures of HIP joined W and ferritic-martensitic steel, for applications in plasma facing components in fusion power plants. A 50 mm thick Ti interlayer was applied to mitigate the difference in thermal expansion.…”

Section: Introductionmentioning

confidence: 99%

Compound materials by PM-HIP

et al. 2014

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There are many applications where compound materials can be of interest, for example when different properties are needed in different parts of a component. Compound materials can be produced by hot isostatic pressing (HIP) of powder metallurgical materials. One aspect that should be considered in the design is the quality of the interface between the two different material compositions. Diffusion during HIP can cause formation of brittle phases in the interface or deteriorate properties by diffusion of alloying elements. The present work shows results from a study where different steel types were joined (quench and temper steel/air hardening steel/bearing steel with a tool steel/corrosion resistant martensitic steel). The evaluation was performed by computational predictions and by small scale HIP experiments that were evaluated by microstructure analysis and chemical analysis.

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Interfacial microstructures of HIP joined W and ferritic–martensitic steel with Ti interlayers

Cited by 28 publications

References 13 publications

The Influence of Interface Characteristics on the Adhesion/Cohesion of Plasma Sprayed Tungsten Coatings

The Influence of Interface Characteristics on the Adhesion/Cohesion of Plasma Sprayed Tungsten Coatings

Tungsten/reduced activation ferritic–martensitic steel joints made with an Fe–Si–B amorphous filler

Compound materials by PM-HIP

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