Study on the influence of oxygen content evolution on the mechanical properties of tantalum powder fabricated by laser powder bed fusion

Song, Chengli; Deng, Zhengtai; Chen, Jiaqi; Yang, Zhuo; Zou, Zhuang; Li, Lisha; Yang, Yongqiang; Xu, Kuixue; Wang, Jianhua

doi:10.1016/j.matchar.2023.113235

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…7 and 8. It is more appropriate to designate this substance as the nonuniform diffusion interstitial solid solution behavior of tantalum/oxygen 30,31 , as the solid solution of oxygen in the bcc Ta lattice increases the internal stress of the nanocrystalline tantalum coating, resulting in the offset of α-Ta phase peaks. Due to the short oxidation time, tantalum oxide crystallization did not occur over a large range, still leading to a generalizing diffraction peak width.…”

Section: Short-time Oxidation Mechanism Of Nanocrystalline Ta Coatingmentioning

confidence: 99%

Short-time high-temperature oxidation behavior of nanocrystalline Ta coating at 850 °C

Niu,

Xing,

Zhu

et al. 2024

npj Mater Degrad

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Short-time oxidation behavior of nanocrystalline Ta coating is studied at 850 °C in comparison with that of the Ta sheet. Owing to the large PBR value and insufficient expansion space, the oxide scale on Ta sheet is dramatically cracked, delaminated and pulverized, resulting in rapid deterioration. For nanocrystalline Ta coatings with columnar structures and quantitative grain boundaries, a rapid oxygen diffusion rate causes no initial Ta2O5 to form. The gap between columns provides spaces for bulk expansion, resulting in few opening cracks and delamination. Ta oxidation experiences a crystallization course from amorphous Ta oxide, leading to in situ temperature surging and thus pulverization.

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Section: Short-time Oxidation Mechanism Of Nanocrystalline Ta Coatingmentioning

confidence: 99%

Short-time high-temperature oxidation behavior of nanocrystalline Ta coating at 850 °C

Niu,

Xing,

Zhu

et al. 2024

npj Mater Degrad

View full text Add to dashboard Cite

show abstract

“…Due to its excellent RT ductility, Ta is used for the cold forming of intricate parts, minimizing potential damage. These characteristics enhance the use of Ta alloys in the military, electronics, medical, and aerospace industries [13,14]. Ta's properties can also be achieved through the addition of solute elements.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure and Crystallographic Texture in Deformed and Annealed BCC Metals and Alloys: A Review

Tandon,

Park,

Khatirkar

et al. 2024

Metals

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Dislocation slips, twinning, shear banding (SBs), strain localization, and martensite formation are a few deformation modes that are activated in BCC metals and alloys. Strain, strain rate, and deformation temperature are other parameters that determine the activation of deformation modes in BCC alloys. This review focuses on several BCC alloys, such as beta-titanium (β-Ti), tantalum (Ta), and ferritic stainless steels (FSSs), all of which exhibit differences in deformation behavior. These alloys often undergo thermo-mechanical processing (TMP) to enhance their mechanical properties. TMP leads to the evolution of deformation-induced products, such as SBs, strain-induced martensite (SIM), strain localizations, and mechanical/deformation twins (DTs) during plastic deformation, while also influencing crystallographic texture. The deformation modes in β-Ti depend upon the stability of the β-phase (i.e., β-stabilizers); low-stability alloys show the formation of SIM along with slips and twins, whereas in highly stable β-Ti alloys, only slip+twin modes are observed as the primary deformation mechanisms. In the case of Ta, slip activity predominantly occurs on {110} planes, but it can also occur on planes with the highest resolved shear stress. The breakdown of Schmid’s law or non-Schmid behavior for Ta and Ta-W alloys has been discussed in detail. The cold rolling (CR) of FSSs results in the formation of ridges, which is an undesirable phenomenon leading to very low formability. The microstructures of the rolled sheets consist of elongated ferrite grains with in-grain SBs, which are preferentially formed in the γ-fiber-oriented grains. The formation of finer grains after recrystallization improves both the mechanical properties and ridging resistance in FSS. Therefore, this review comprehensively reports on the impact of TMP on the microstructural and crystallographic texture evolution during the plastic deformation and annealing treatment of β-Ti, Ta alloys, and FSSs in BCC materials, using results obtained from electron microscopy and X-ray diffraction.

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Simultaneously enhanced strength and plasticity of laser powder bed fused tantalum by hot isostatic pressing

Qin,

Shi,

Zhou

et al. 2024

Materials Letters

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Study on the influence of oxygen content evolution on the mechanical properties of tantalum powder fabricated by laser powder bed fusion

Cited by 4 publications

References 24 publications

Short-time high-temperature oxidation behavior of nanocrystalline Ta coating at 850 °C

Short-time high-temperature oxidation behavior of nanocrystalline Ta coating at 850 °C

Evolution of Microstructure and Crystallographic Texture in Deformed and Annealed BCC Metals and Alloys: A Review

Simultaneously enhanced strength and plasticity of laser powder bed fused tantalum by hot isostatic pressing

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