Microstructure and strengthening mechanisms of tantalum prepared using laser melting deposition

Guan, Baosheng; Xu, Man; Yang, Xiaohui; Zhou, Yuan; Li, Chun; Ji, Yaqi; Xue, Lianqing; Li, Jinfeng; Wang, Dou; Tang, Jingang; Le, Guomin

doi:10.1016/j.ijrmhm.2021.105773

Cited by 10 publications

(13 citation statements)

References 29 publications

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“…On one hand, this has a solid solution-strengthening effect. On the other hand, it significantly reduces toughness [15,32].…”

Section: The Effect Of Oxygen and Nitrogen Content On Mechanical Prop...mentioning

confidence: 99%

“…The interstitial solid solution of oxygen and nitrogen could significantly affect the yield strength of pure tantalum [15]. The yield strength (YS) of pure tantalum can be expressed as follows [32]:…”

Section: The Effect Of Oxygen and Nitrogen Content On Mechanical Prop...mentioning

confidence: 99%

“…Le G M fabricated pure Ta using a laser melting deposition (LMD) technology with coarse and fine spherical powders. The oxygen and nitrogen content of pure tantalum prepared with coarse spherical tantalum powders increased by 123 ppm and 60 ppm, which was far lower than that with fine spherical tantalum powders and resulted in relatively low hardness and high plasticity [15]. However, further research is still needed to understand the effect of oxygen and nitrogen impurities on the mechanical performance of SLMed Ta.…”

Section: Introductionmentioning

confidence: 98%

“…The effect of the microstructure and impurities on the mechanism of strength and toughness was mainly analyzed. [20] 415-747 27-43 Electron beam melted [10] 205 40 Cold-rolled [14] 265 62 Annealed [10] 200-390 20-50 Wrought [1] 178 21 Laser melting deposition [15] 400-480 14-16 SLM [10,19] 600-750 1-3…”

Section: Introductionmentioning

confidence: 99%

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Selective Laser Melting Additive Manufactured Tantalum: Effect of Microstructure and Impurities on the Strengthening-Toughing Mechanism

Lian

Chen

et al. 2023

Materials

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The balance between the strength and the toughness of pure tantalum (Ta) fabricated with selective laser melting (SLM) additive manufacturing is a major challenge due to the defect generation and affinity for oxygen and nitrogen. This study investigated the effects of energy density and post-vacuum annealing on the relative density and microstructure of SLMed tantalum. The influences of microstructure and impurities on strength and toughness were mainly analyzed. The results indicated that the toughness of SLMed tantalum significantly increased due to a reduction in pore defects and oxygen-nitrogen impurities, with energy density decreasing from 342 J/mm3 to 190 J/mm3. The oxygen impurities mainly stemmed from the gas inclusions of tantalum powders, while nitrogen impurities were mainly from the chemical reaction between the molten liquid tantalum and nitrogen in the atmosphere. The proportion of <110> texture decreased after vacuum-annealing at 1200 °C, while that of the <100> texture increased. Concurrently, the density of dislocations and small-angle grain boundaries significantly decreased while the resistance of the deformation dislocation slip was significantly reduced, enhancing the fractured elongation up to 28% at the expense of 14% tensile strength.

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“…On one hand, this has a solid solution-strengthening effect. On the other hand, it significantly reduces toughness [15,32].…”

Section: The Effect Of Oxygen and Nitrogen Content On Mechanical Prop...mentioning

confidence: 99%

Section: The Effect Of Oxygen and Nitrogen Content On Mechanical Prop...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Selective Laser Melting Additive Manufactured Tantalum: Effect of Microstructure and Impurities on the Strengthening-Toughing Mechanism

Lian

Chen

et al. 2023

Materials

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“…AM of pure tantalum has been mainly investigated in the context of laser powder bed fusion (LPBF) and electron beam powder bed fusion (EB-PBF) for the manufacturing of orthopaedic implants [14][15][16][17][18], and wire arc additive manufacturing (WAAM) to produce larger components for the aerospace and chemical industries [7,19]. LMD has also been applied to fabricate pure tantalum parts [20] and deposit tantalum coatings to improve the osseointegration of titanium implants [21]. However, to the best of authors' knowledge, no attempts to repair tantalum components have been reported in the literature so far.…”

Section: Introductionmentioning

confidence: 99%

Damage Characterisation of Tantalum Ion Source Electrodes and Reconditioning by Wire- and Powder-Based Laser Metal Deposition

Romano¹,

Kroģere²,

Ratkus³

et al. 2023

Preprint

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Comparison of laser cladding properties of tantalum and tantalum pentoxide powders on titanium substrates

Li,

Hsieh,

Lin

et al. 2024

Int J Adv Manuf Technol

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Tantalum (Ta) has excellent mechanical properties, biocompatibility, and corrosion resistance. However, its application is limited by its high cost. Tantalum pentoxide (Ta 2 O 5 ), a stable oxide of Ta, is a key role of Ta surface with excellent biological properties and corrosion resistance and has the advantage of a lower cost. In this study, Ta and Ta 2 O 5 powders were preplaced on titanium (Ti) substrates and irradiated by a diode laser to form single-layer single-pass coatings. For comparison purposes, the scanning process was performed using a range of laser powers (1000, 1500, and 2000 W) and scanning speeds (3-5, 4.5-7.5, and 6-10 mm/s). The Ta coatings showed no surface cracking. However, spherical pores were observed near the fusion line of the coating with the substrate in some samples. The porosity increases with the decrease of laser powers and the scanning speeds. The formation of these pores was attributed mainly to the evaporation of the Ti substrate during the cladding process and the subsequent entrapment of the vapor bubbles within the coating. The Ta 2 O 5 coatings showed almost no pores but exhibited few transverse cracks on the coating surface as a result of the thermal expansion coe cient mismatch between the ceramic coating and metallic substrate. For all of the coatings, the coating hardness was signi cantly higher than that of the substrate. The Ta 2 O 5 coatings (580-700 HV) showed a higher hardness than the Ta coatings (350-400 HV). Moreover, the coating hardness remained approximately constant through the coating depth, whereas that of the Ta coatings showed a notable reduction with an increasing distance from the coating surface.

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Microstructure and strengthening mechanisms of tantalum prepared using laser melting deposition

Cited by 10 publications

References 29 publications

Selective Laser Melting Additive Manufactured Tantalum: Effect of Microstructure and Impurities on the Strengthening-Toughing Mechanism

Selective Laser Melting Additive Manufactured Tantalum: Effect of Microstructure and Impurities on the Strengthening-Toughing Mechanism

Damage Characterisation of Tantalum Ion Source Electrodes and Reconditioning by Wire- and Powder-Based Laser Metal Deposition

Comparison of laser cladding properties of tantalum and tantalum pentoxide powders on titanium substrates

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