New Ti/β-Ti alloy laminated composite processed by powder metallurgy: Microstructural evolution and mechanical property

Zhang, Weidong; Peng, Yang; Cao, Yuankui; Li, Xi; Wei, Daixiu; Kato, Hidemi; Wu, Zhenggang

doi:10.1016/j.msea.2021.141702

Cited by 10 publications

(1 citation statement)

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“…More novel approaches have been reported to generate fully dense samples with comparable properties to wrought alloys [10]. For example, induction sintering [6], spark plasma sintering (SPS) [11], extrusion [12,13], FAST-forge (Field-assisted sintering technology) [14] and direct powder forging (DPF) [15][16][17]. In the case of SPS [18] and FAST-forge [19], both have been shown to achieve near-net shape (NNS) parts with complex geometries.…”

Section: Introductionmentioning

confidence: 99%

Direct Powder Forging—A New Approach for near Net Shape Processing of Titanium Powders

Careau¹,

Ulate-Kolitsky²,

Tougas³

2023

Powders

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This study investigates direct powder forging (DPF) as a new approach for near-net-shape processing of titanium alloys using a coarse particle size distribution (PSD) between 90 and 250 μm. This route was utilised to takes advantage of DPF’s enclosed nature to make near-net-shape components with conventional forging equipment, making it attractive and viable even for reactive powder such as titanium. In this study, the uncompacted Ti-6Al-4V ELI powder was sealed under vacuum in a stainless-steel canister and hot forged in air to produce a fully dense titanium femoral stem. After the final forging stage, the excess material in the flash region was cut, which efficiently released the canister, revealing the forged part with minimal surface contamination. The as-forged microstructure comprises coarse β grains with a martensitic structure. The subsequent annealing was able to generate a fine and homogenous lamellar microstructure with mechanical properties that respects the surgical implant standard, showing that DPF offers significant potential for forged titanium parts. Therefore, the DPF process provides a suitable alternative to produce titanium components using basic equipment, making it more available to the industry.

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