Microstructure, basic thermal–mechanical and Charpy impact properties of W-0.1 wt.% TiC alloy via chemical method

Lang, Shaoting; Yan, Qingzhi; Sun, Ningbo; Zhang, Xiaoxin; Deng, Lin; Wang, Yijia; Chen, Ge

doi:10.1016/j.jallcom.2015.11.088

Cited by 35 publications

(8 citation statements)

References 27 publications

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“…As reported by X. Ding et al, spark plasma sintering of W -1%TiC produced an average grain size of 3 µm and relative density of 98.6% [22]. Additionally, S. Lang et al demonstrated a decrease in tungsten's DBTT to below 300°C on samples that had undergone hot rolling with an 83% reduction ratio of sintered W-TiC alloy [23]. Theoretical and experimental research on the alloying of tungsten with Ti metal, as well as work on other Ti compounds, have also shown sufficient cause for further investigation.…”

Section: Introductionmentioning

confidence: 72%

A study on the sintering of ultrafine grained tungsten with Ti-based additives

Ren

Koopman

Fang

et al. 2017

International Journal of Refractory Metals and Hard Materials

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Tungsten (W) is a brittle material at room temperature making it very difficult to fabricate. Although the lack of ductility remains a difficult challenge, nano-sized and ultrafine grain (UFG) microstructures offer potential for overcoming tungsten's room temperature brittleness. One way to manufacture UFG W is to compact and sinter nanosized W powder, however, it is a non-trivial task to control grain growth during sintering. In an effort to inhibit grain growth, the effect of Ti-based additives on the densification and grain growth of nano-W powders was investigated in this study. The addition of 1 wt.% Ti into tungsten led to more than a 63% decrease in average grain size of sintered samples at comparable density levels. It was also found that sintering in Ar yielded a finer grain size than sintering in H 2 at similar densities. Compared to conventional high temperature sintering, a lower temperature sintering cycle for a longer hold time resulted in both near-full density and fine grain size. The roles of the Ti additive include not only the inhibition of grain growth, but also the potential absorption of oxygen from W particles.

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Section: Introductionmentioning

confidence: 72%

A study on the sintering of ultrafine grained tungsten with Ti-based additives

Ren

Koopman

Fang

et al. 2017

International Journal of Refractory Metals and Hard Materials

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“…At present, the common deformation processing techniques of forging, rolling and swaging are exploited to improve the performances of W materials. W materials (such as pure W, W-K alloy, W-TiC, W-Y 2 O 3 and W-La 2 O 3 ) were processed by different deformation processing techniques with different processes to improve its microstructure and performances [37,63,[79][80][81][82][83][84][85][86][87]. Table 2 lists the relative density, grain size and some other performances of the obtained W materials after processed by different deformation processing techniques.…”

Section: Follow-up Deformation Processing Techniquementioning

confidence: 99%

Manufacturing of tungsten and tungsten composites for fusion application via different routes

2019

Tungsten

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Tungsten is a refractory metal with the highest melting point of all metals, which is considered as a promising candidate material for plasma-facing materials in the future fusion reactor. However, tungsten faces several challenges from intrinsic embrittlement, irradiation embrittlement and recrystallization embrittlement during the operation of the fusion reactor. To satisfy the fusion engineering application, an advanced tungsten material with the fine grain and dense microstructure is required and developed. This paper briefly introduces the application background of the tungsten materials and mainly illustrates a series of common techniques for manufacturing advance tungsten materials, such as powder preparation technologies, bulk densification techniques, continuous processing technologies and the coating and additive manufacturing technologies. Furthermore, the development prospects for manufacturing techniques of tungsten materials are also presented in the end. Considering the tungsten materials employed in the fusion engineering application, combining these scalable techniques of the wet-chemical method, pressureless sintering and continuous deformation processing techniques would be the possible research and development routes to realize the manufacture of the advanced tungsten materials.

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“…Transition and rare metal carbide and oxide particles such as ZrC [ 10 , 11 ], TiC [ 12 , 13 , 14 , 15 , 16 , 17 ], HfC [ 18 ], La 2 O 3 [ 19 , 20 ], and Y 2 O 3 [ 21 ] have been introduced into the tungsten matrix to improve the mechanical properties of tungsten materials effectively. Among these introduced particles, transition metal carbide particles have been proven to be ideal strengthening phases for tungsten materials [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…To date, several methods have been developed to prepare carbide particle reinforced tungsten materials, such as using mechanical alloying [ 3 , 10 , 13 , 14 , 15 , 21 , 27 ] and chemical method [ 16 , 17 , 28 , 29 , 30 , 31 , 32 ] to prepare tungsten composite powders, and then utilizing different sintering methods to consolidate the composite powders. Among these powder preparing methods, mechanical alloying is the predominant preparation method to prepare carbide particle reinforced tungsten alloys.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Ultra-Fine-Grained W-TiC Alloys by a Simple Ball-Milling and Hydrogen Reduction Method

et al. 2021

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In this paper, a simple method to fulfill the ideal microstructural design of particle reinforced tungsten (W) alloys with promising mechanical properties is presented. W-0.5 wt.% TiC powders with core-shell (TiC/W) structure are prepared by ball-milling and controlled hydrogen reduction processes. TEM observation demonstrates that the nano TiC particles are well coated by tungsten. The W-TiC powders are sintered by spark plasma sintering (SPS) under 1600 °C. The sintered microstructures are characterized by FESEM and TEM. It is found that the W-0.5TiC alloys obtain an ultra-fine-sized tungsten grain of approximately 0.7 μm. The TiC particles with the original nano sizes are uniformly distributed both in tungsten grain interiors and at tungsten grain boundaries with a high number density. No large agglomerates of TiC particles are detected in the microstructure. The average diameter of the TiC particles in the tungsten matrix is approximately 47.1 nm. The mechanical tests of W-0.5 TiC alloy show a significantly high microhardness and bending fracture strength of 785 Hv0.2 and 1132.7 MPa, respectively, which are higher than the values obtained in previous works. These results indicate that the methods used in our work are very promising to fabricate particle-dispersion-strengthened tungsten-based alloys with high performances.

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Microstructure, basic thermal–mechanical and Charpy impact properties of W-0.1 wt.% TiC alloy via chemical method

Cited by 35 publications

References 27 publications

A study on the sintering of ultrafine grained tungsten with Ti-based additives

A study on the sintering of ultrafine grained tungsten with Ti-based additives

Manufacturing of tungsten and tungsten composites for fusion application via different routes

Fabrication of Ultra-Fine-Grained W-TiC Alloys by a Simple Ball-Milling and Hydrogen Reduction Method

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