Development of a powder metallurgy process for tungsten components

Piotter, V.; Zeep, B.; Norajitra, P.; Ruprecht, R.; Weth, A. von der; Haußelt, J.

doi:10.1016/j.fusengdes.2008.06.022

Cited by 45 publications

(20 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tungsten has already been selected as a candidate material for ITER. Pure tungsten is generally manufactured through different technologies, including powder metallurgy [6,7] and plastic deformation [8,9]. Recovery, recrystallization and grain coarsening will occur in plastically deformed tungsten at high temperature.…”

Section: Introductionmentioning

confidence: 99%

Hardness loss and microstructure evolution of 90% hot-rolled pure tungsten at 1200–1350 °C

Wang

Zan

et al. 2017

Fusion Engineering and Design

View full text Add to dashboard Cite

Tungsten is a promising plasma-facing material because of its low sputtering yield, high melting point and high thermal conductivity. The hardness loss and microstructure evolution of pure tungsten hot-rolled to 90% thickness reduction is investigated by isothermal annealing at temperature range of 1200 to 1350 °C. Changes in the mechanical properties caused by recovery and recrystallization during heat treatment are detected by Vickers hardness measurements. Additionally, the microstructural evolution is analyzed with light optical microscopy and X-ray diffraction. The results indicate that the hardness evolution can be divided into two stages: recovery and recrystallization. Recrystallization of W90 in the temperature range of 1200 to1350 °C is governed by the same activation energy as grain boundary diffusion. The average recrystallized grain size is larger for lower annealing temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Hardness loss and microstructure evolution of 90% hot-rolled pure tungsten at 1200–1350 °C

Wang

Zan

et al. 2017

Fusion Engineering and Design

View full text Add to dashboard Cite

show abstract

“…Owing to the extremely high melting point, tungsten is generally manufactured via the powder metallurgy route [5]. The combination of sintering and hot or cold-work plays a fundamental role in powder consolidation and design of the final structure.…”

Section: Introductionmentioning

confidence: 99%

Development of Wire + Arc additive manufacture for the production of large-scale unalloyed tungsten components

Marinelli

Martina

Ganguly

et al. 2019

International Journal of Refractory Metals and Hard Materials

View full text Add to dashboard Cite

The manufacturing of refractory-metals components presents some limitations induced by the materials' characteristic low-temperature brittleness and high susceptibility to oxidation. Powder metallurgy is typically the manufacturing process of choice. Recently, Wire + Arc Additive Manufacturing has proven capable to produce fully-dense large-scale metal parts at relatively low cost, by using highquality wire as feedstock. In this study, this technique has been used for the production of large-scale tungsten linear structures. The orientation of the wire feeding has been studied and optimised to obtain defect-free tungsten deposits. In particular, front wire feeding eliminated the occurrence of pores and micro-cracks, when compared to side wire feeding. The microstructure, the occurrence of defects and their relationship with the deposition process have also been discussed. Despite the repetitive thermal cycles and the inherent brittleness of the material, the asdeposited structures were free from internal cracks and the layer dimensions were stable during the entire deposition process. This enabled the production of a relatively large-scale component, with the dimension of 210 x 75 x 12 mm. This study has demonstrated that Wire + Arc Additive Manufacture can be used to produce large-scale parts in unalloyed tungsten by complete fusion, presenting a potential alternative to the powder metallurgy manufacturing route.

show abstract

“…Because MIM is a process for producing small parts in complex shapes, innovative sintering approaches such as SPS, FAST and microwave sintering have not been applied in MIM industries to date. Piotter et al [14] performed a comprehensive study on the conventional sintering of W samples with a powder particle size of 2 μm in a dry H 2 atmosphere at temperatures higher than 2000°C. Thermal treatment resulted in a grain size of approximately 18 μm and a final density of 95% measured by a helium pycnometer.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of the particle size effect on the densification behaviour of metal injection moulded tungsten parts during sintering

et al. 2015

View full text Add to dashboard Cite

Development of a powder metallurgy process for tungsten components

Cited by 45 publications

References 1 publication

Hardness loss and microstructure evolution of 90% hot-rolled pure tungsten at 1200–1350 °C

Hardness loss and microstructure evolution of 90% hot-rolled pure tungsten at 1200–1350 °C

Development of Wire + Arc additive manufacture for the production of large-scale unalloyed tungsten components

Experimental and numerical analysis of the particle size effect on the densification behaviour of metal injection moulded tungsten parts during sintering

Contact Info

Product

Resources

About