Solidification microstructure variations in additively manufactured Ti-6Al-4V using laser powder bed fusion

Yang, Lu; Ramachandran, Saranarayanan; Bagasol, Axieh; Guan, Qiyu; Wang, Weiguang; Browne, David J.; Dowling, Denis P.; Mirihanage, Wajira

doi:10.1016/j.scriptamat.2023.115430

Cited by 7 publications

(1 citation statement)

References 30 publications

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“…Metal additive manufacturing (MAM) encompasses various techniques such as laser powder (LP, ISO/ASTM 52941), electron beam (EB) powder (ISO/ASTM 52911–3:2023), and wire and arc-based methods (ISO/ASTM WK69732). , LP-based technology stands out in the medical industry due to its precise dimensional control and cost-effectiveness compared to EB-based processes. , However, compared to conventional processes, LP-based processes demand a higher cost of investment and processing for the batch manufacturing of medium to large biomedical components, which is of concern to the industry . LP-based processes possess inherent challenges such as inclusions of porosity and residual thermal stresses on the manufactured Ti6Al4V implants, resulting in compromised mechanical properties. − Despite these constraints, the production of biomedical implants and metallic medical devices relies heavily on powder-based MAM techniques, particularly laser powder bed fusion. − …”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on the Material Property and Cell Viability of Wire Arc Additively Manufactured Ti6Al4 V

Paul,

Singh,

Hirwani

et al. 2024

ACS Appl. Bio Mater.

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Wire arc additive manufacturing (WAAM) holds promise for producing medium to large industrial components. Application of WAAM in the manufacturing of biomedical materials has not yet been evaluated. The current study addresses two key research questions: first, the suitability of the WAAMed Ti6Al4V alloy for biomedical applications, and second, the effect of Ti6Al4V’s constituents (α and β phases) on the cell viability. The WAAMed Ti6Al4V alloy was fabricated (as-deposited: AD) using a metal inert gas (MIG)-based wire arc system using an in-house designed shielding chamber filled with argon. Subsequently, samples were subjected to solution treatment (950 °C for 1 h), followed by aging at 480 °C (T1), 530 °C (T2), and 580 °C (T3) for 8 h and subsequent normalization to ambient conditions. Microstructural analysis revealed ∼45.45% of α′-Ti colonies in the as-deposited samples, reducing to 23.26% postaging at 580 °C (T3). The α-lath thickness and interstitial oxygen content in the sample were observed to be proportional to the aging temperature, peaking at 580 °C (T3). Remarkably, during tribocorrosion analysis in simulated body fluid, the 580 °C-aged T3 sample displayed the lowest corrosion rate (7.9 μm/year) and the highest coefficient of friction (CoF) at 0.58, showing the effect of increasing oxygen content in the alloy matrix. Cell studies showed significant growth at 530 and 580 °C by day 7, correlated with higher oxygen content, while other samples had declining cell density. Additionally, optimal metallurgical property ranges were identified to enhance the Ti6Al4V alloy’s biocompatibility, providing crucial insights for biomedical implant development.

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Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on the Material Property and Cell Viability of Wire Arc Additively Manufactured Ti6Al4 V

Paul,

Singh,

Hirwani

et al. 2024

ACS Appl. Bio Mater.

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Stress Mitigation of Nanosilicon Anode to Achieve Energy‐Dense and Highly‐Stable Full Cell

Cao,

Zheng,

Dong

et al. 2023

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Nanosilicon (nano‐Si) anode is subjected to significant stress concentration, which is caused by extrusion deformation of expanded Si nanoparticles with uneven distribution. The low‐strength binder and adhesive interface are unable to withstand the stress, resulting in exfoliation and impeding the use of nano‐Si anodes. This work aims to mitigate stress in a Si anode with flexible copper (Cu) skeletons that are metallurgically bonded to uniformly distributed Si nanoparticles. It is worth noting that the proposed porous Si‐Cu anode exhibits improved high‐load cycling performance and promising potential in the full cell, with an energy density of 463 Wh kg−1 at 0.5 C and retention of 81% after 500 cycles at 2 C. Chemo‐mechanical simulation and in (ex) situ observation demonstrate that expansion stress is reduced and more evenly distributed in the anode due to uniform distribution of Si nanoparticles, flexible Cu skeletons, and adequate pores. More importantly, the stress is primarily distributed in the flexible Cu skeletons and bonding interface, preventing anode exfoliation, and ensuring efficient lithium ion/electron transference. This work sheds light on the structure construction of an alloy‐type anode.

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Solidification Microstructure Reconstruction and Its Effects on Phase Transformation, Grain Boundary Transformation Mechanism, and Mechanical Properties of TC4 Alloy Welded Joint

Du,

Liu,

Wang

et al. 2024

Metall Mater Trans A

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Solidification microstructure variations in additively manufactured Ti-6Al-4V using laser powder bed fusion

Cited by 7 publications

References 30 publications

Effect of Heat Treatment on the Material Property and Cell Viability of Wire Arc Additively Manufactured Ti6Al4 V

Effect of Heat Treatment on the Material Property and Cell Viability of Wire Arc Additively Manufactured Ti6Al4 V

Stress Mitigation of Nanosilicon Anode to Achieve Energy‐Dense and Highly‐Stable Full Cell

Solidification Microstructure Reconstruction and Its Effects on Phase Transformation, Grain Boundary Transformation Mechanism, and Mechanical Properties of TC4 Alloy Welded Joint

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