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Advancement in the pressureless sintering of CP titanium using high-frequency induction heating

Abstract
High-frequency induction heating is applied as an alternative heating source for pressureless sintering of commercially pure Ti powders, aiming to intensify the sintering process. The effects of the process parameters on the properties of the sintered material are systematically studied. The initial powder compact density is the most influential parameter permitting sintered structures with highly porous to almost fully dense appearance. Short heating time combined with sintering to temperatures just above the β-transus resulted in a strong diffusion bonding between the Ti powder particles, and grain growth is observed at the former boundaries of the neighboring powder particles. The dimpled appearance of the fracture surface at those regions confirmed the strong metallic interparticle bonding. Tensile properties comparable to those of Ti-Grade 3 and Ti-Grade 4 are achieved, which also demonstrates the efficiency of the induction sintering process. A mechanism explaining the fast and efficient sintering is proposed. The process has the added advantage of minimizing the oxygen pickup.
Type
Journal Article
Type of thesis
Series
Citation
Raynova, S. (Stella) R., Collas, Y., Yang, F., & Bolzoni, L. (2019). Advancement in the pressureless sintering of CP titanium using high-frequency induction heating. Metallurgical and Materials Transactions A, 50A(10), 4732–4742. https://doi.org/10.1007/s11661-019-05381-z
Date
2019
Publisher
Springer
Degree
Supervisors
Rights
© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made