Carbide Formation in Refractory Mo15Nb20Re15Ta30W20 Alloy under a Combined High-Pressure and High-Temperature Condition

Zhang, Congyan; Bhandari, Uttam; Zeng, Congyuan; Ding, Huan; Guo, Shengmin; Yan, Jinyuan; Yang, Shizhong

doi:10.3390/e22070718

Cited by 10 publications

(4 citation statements)

References 39 publications

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“…Zhang et al [128] reviewed high pressure induced phase transitions in HEAs. Application of high pressure torsion [37,[129][130][131][132][133][134][135][136][137][138][139][140][141][142] is more frequent than other pressure techniques [136,[143][144][145][146][147][148][149][150].…”

Section: Background and Conventional Methodsmentioning

confidence: 99%

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

Sonal

Lee

2021

Metals

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Alloying has been very common practice in materials engineering to fabricate metals of desirable properties for specific applications. Traditionally, a small amount of the desired material is added to the principal metal. However, a new alloying technique emerged in 2004 with the concept of adding several principal elements in or near equi-atomic concentrations. These are popularly known as high entropy alloys (HEAs) which can have a wide composition range. A vast area of this composition range is still unexplored. The HEAs research community is still trying to identify and characterize the behaviors of these alloys under different scenarios to develop high-performance materials with desired properties and make the next class of advanced materials. Over the years, understanding of the thermodynamics theories, phase stability and manufacturing methods of HEAs has improved. Moreover, HEAs have also shown retention of strength and relevant properties under extreme tribological conditions and radiation. Recent progresses in these fields are surveyed and discussed in this review with a focus on HEAs for use under extreme environments (i.e., wear and irradiation) and their fabrication using additive manufacturing.

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Section: Background and Conventional Methodsmentioning

confidence: 99%

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

Sonal

Lee

2021

Metals

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“…On the contrary, the alloying of carbon with bcc-structured HEAs has been rarely investigated. According to Zhang et al [31], the structure and lattice constant of the Nb 20 Ta 30 Mo 15 -W 20 Re 15 HEA are not affected by adding 0.1 at% C, although binary carbides are formed above 809°C at a pressure of 6 GPa. Very recently, Casilaas-Trujillo et al [32] studied the solution energies of dilute carbon atoms in the bcc HfNbTiVZr HEA by employing theoretical calculations.…”

Section: Introductionmentioning

confidence: 98%

Interstitially carbon-alloyed refractory high-entropy alloys with a body-centered cubic structure

et al. 2021

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The introduction of carbon interstitials into high-entropy alloys (HEAs) provides an effective way to improve their properties. However, all such HEA systems explored so far are limited to those with the face-centered-cubic (fcc) structure. Here we report the structural, mechanical and physical properties of the refractory (Nb 0.375 Ta 0.25 Mo 0.125 -W 0125 Re 0.125 ) 100−x C x HEAs over a wide x range of 0 ≤ x ≤ 20. It is found that, whereas the starting HEA (x = 0) is composed of a major body-centered-cubic (bcc) phase with significant impurities, the bcc phase fraction increases with the C concentration and achieves almost 100% at x = 20. Moreover, the increase of C content x results in an expansion of the bcc lattice, an enhancement of the microhardness, an increase in residual resistivity and a small variation of density of states at the Fermi level. All these features are consistent with the expectation that carbon atoms occupy the interstitial site. For x ≥ 11.1, the X-ray photoelectron spectroscopy indicates the bond formation between the carbon and metal atoms, suggesting that some carbon atoms may also reside in the lattice site. In addition, a semiquantitative analysis shows that the enhanced mixing entropy caused by carbon addition plays a key role in stabilizing the (nearly) single solid-solution phase. Our study not only provides the first series of carbon interstitial HEAs with a bcc structure, but also helps to better understand the alloying behavior of carbon in refractory HEAs.

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“…By examining the latest developments in LPBF technology, such as improved process parameters, enhanced scanning strategies, and optimized material compositions, this review will provide a comprehensive understanding of the evolving capabilities of LPBF technology. Additionally, this review will highlight the types of alloys [10][11][12][13][14][15] commonly used in LPBF, exploring various materials, including high-performance metals, superalloys, and specialized alloys tailored for specific applications. Focusing on the scope and objectives of this review, the exploration of LPBF technology will include a detailed analysis of alloy selection criteria, material properties, process parameters, and performance characteristics that influence the success of LPBF manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Laser Powder Bed Fusion: Exploring Recent Technological Breakthroughs and Alloy Utilization

Hedric

2024

Preprint

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Laser Powder Bed Fusion (LPBF), as a transformative technology in the field of additive manufacturing, offers unprecedented design flexibility and material efficiency. This review paper delves into the latest advancements in LPBF technology and the various alloys used in the process, including titanium alloys, aluminum alloys, nickel-based superalloys, steel alloys, copper alloys, and high-entropy alloys. For each alloy category, we discuss their specific applications, performance characteristics, and challenges faced in LPBF usage. The paper discusses important technological breakthroughs, including innovations in laser systems, scanning strategies, and in-situ monitoring technologies, which have enhanced the precision and reliability of LPBF.

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Carbide Formation in Refractory Mo15Nb20Re15Ta30W20 Alloy under a Combined High-Pressure and High-Temperature Condition

Cited by 10 publications

References 39 publications

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

Recent Advances in Additive Manufacturing of High Entropy Alloys and Their Nuclear and Wear-Resistant Applications

Interstitially carbon-alloyed refractory high-entropy alloys with a body-centered cubic structure

Laser Powder Bed Fusion: Exploring Recent Technological Breakthroughs and Alloy Utilization

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