Spark plasma sintering of a commercial TiAl 48-2-2 powder: Densification and creep analysis

Martins, David; Grumbach, Fanny; Sallot, Pierre; Mocellin, Katia; Bellet, Michel; Estournès, Claude

doi:10.1016/j.msea.2017.11.041

Cited by 19 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7. Thus, it is likely that different mechanisms occur simultaneously during the SPS of those materials as it has also been raised in the literature [22,29]. A way to improve the model would be to combine at least two mechanisms to describe the densification.…”

Section: Numerical Identification Of the Creep Parametersmentioning

confidence: 98%

“…To do so, two different approaches are used: the Olevsky [13] and the Abouaf [14] (or the Norton-Green) models. They both will be used since the mechanical model is based on previous works done on the same machine used for this study: Manière et al [21] worked on Al 2 O 3 samples with the Olevsky model whereas Martins et al [22] studied the TiAl with the Abouaf model.…”

Section: Creep Law and Densification Modelsmentioning

confidence: 99%

“…6 shows the comparison between the experimental and calculated values of the density of both the Al 2 O 3 and the TiAl pellets during the SPS trials. As mentioned previously, the sintering model chosen for the Al 2 O 3 uses the Olevsky approach like in the work of C. Manière et al [21], whereas it uses the Abouaf approach for the TiAl sample similarly to the study of D. Martins et al [22]. The porosity functions required by the Abouaf approach are described in Eq.…”

Section: Numerical Identification Of the Creep Parametersmentioning

confidence: 99%

See 2 more Smart Citations

Fully coupled electrothermal and mechanical simulation of the production of complex shapes by spark plasma sintering

Laan

Epherre²,

Chevallier³

et al. 2021

Journal of the European Ceramic Society

View full text Add to dashboard Cite

The obtention of an accurate mechanical model of the spark plasma sintering (SPS) requires the identification of creep parameters. Those parameters are usually determined experimentally, which involves several tests and could be a source of error for the model predictions. A numerical identification, based on only one SPS experiment per material, allowed the determination of the creep parameters of Al 2 O 3 and TiAl samples. The resulting mechanical model was then coupled with an electro-thermal model of the system to obtain a fully coupled simulation of the SPS. This model can predict the densification behavior not only of simple pellets, but also of complex shape configurations. It accurately predicts the density gradients inside the complex sintered parts as well as the interface distortion during sintering. Thus, numerical simulation can be used as an efficient predictive tool to obtain fully dense objects with the desired geometry.

show abstract

Section: Numerical Identification Of the Creep Parametersmentioning

confidence: 98%

Section: Creep Law and Densification Modelsmentioning

confidence: 99%

Section: Numerical Identification Of the Creep Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Fully coupled electrothermal and mechanical simulation of the production of complex shapes by spark plasma sintering

Laan

Epherre²,

Chevallier³

et al. 2021

Journal of the European Ceramic Society

View full text Add to dashboard Cite

show abstract

“…Of much interest to this paper is carburation in TiAl alloys manufactured using SPS. Martin et al [77] fully densified a commercial 48-2-2 TiAl powder by SPS and developed a two-fold protocol to obtain the desired microstructure and avoid TiC formation. Firstly, 8 and 10 mm samples were densified at 1200 • C below 50 MPa to obtain fully densified compacts with minimal (less than 1 µm) growth of the TiC layer.…”

Section: Carburation At High Temperature During Spsmentioning

confidence: 99%

Spark Plasma Sintering of Titanium Aluminides: A Progress Review on Processing, Structure-Property Relations, Alloy Development and Challenges

Mogale

Matizamhuka

2020

Metals

View full text Add to dashboard Cite

Titanium aluminides (TiAl) have the potential of substituting nickel-based superalloys (NBSAs) in the aerospace industries owing to their lightweight, good mechanical and oxidation properties. Functional simplicity, control of sintering parameters, exceptional sintering speeds, high reproducibility, consistency and safety are the main benefits of spark plasma sintering (SPS) over conventional methods. Though TiAl exhibit excellent high temperature properties, SPS has been employed to improve on the poor ductility at room temperature. Powder metallurgical processing techniques used to promote the formation of refined, homogeneous and contaminant-free structures, favouring improvements in ductility and other properties are discussed. This article further reviews published work on phase constituents, microstructures, alloy developments and mechanical properties of TiAl alloys produced by SPS. Finally, an overview of challenges in as far as the implementation of TiAl in industries of interest are highlighted.

show abstract

“…FAST of titanium aluminides (TiAl), which are weight saving candidates in aeroengine applications, has been investigated due to difficulties in conventional processing [35][36][37][38]. FAST of TiAl has been a research focus of CEMES in Toulouse [39][40][41][42], with the Ti-48Al-2W-0.08B IRIS alloy with reportedly excellent mechanical properties developed [43,44], and single-step FAST consolidation to near-net-shape of a γ-TiAl turbine blade with excellent properties [45].…”

Section: Single Materials Systemsmentioning

confidence: 99%

Exploitation of field assisted sintering technology (FAST) for titanium alloys

2020

View full text Add to dashboard Cite

Field assisted sintering technology (FAST), also known as spark plasma sintering (SPS), is increasingly utilised to process powders/particulates of engineering alloys and metal-based composite materials. FAST is currently extensively used at laboratory scale by research institutes and universities as a rapid and cost‑effective process to consolidate powders. This includes investigating new alloy compositions and material combinations, improving established materials’ properties, and consolidating materials considered challenging/impossible through conventional sintering techniques. FAST is gaining traction for industrial applications with possible benefits as an alternative to hot isostatic pressing or conventional melt-wrought processing. FAST preform complexity is improving and near-net-shape components are becoming a possibility. Demonstrator components for the aerospace and automotive sectors, including aeroengine blades, brake callipers and rocker arms, have been produced from titanium alloy powders. FAST has also been demonstrated as an effective intermediate step for consolidating a range of feedstocks, including recycled materials, into shaped billets that can be further processed to refine shape and/or properties. Hybrid processes such as FAST‑forge and FAST‑DB have been developed that can produce affordable titanium components with forged properties. This paper presents the current status, emerging developments, and challenges of FAST for titanium-based powders and particulates.

show abstract

Spark plasma sintering of a commercial TiAl 48-2-2 powder: Densification and creep analysis

Cited by 19 publications

References 16 publications

Fully coupled electrothermal and mechanical simulation of the production of complex shapes by spark plasma sintering

Fully coupled electrothermal and mechanical simulation of the production of complex shapes by spark plasma sintering

Spark Plasma Sintering of Titanium Aluminides: A Progress Review on Processing, Structure-Property Relations, Alloy Development and Challenges

Exploitation of field assisted sintering technology (FAST) for titanium alloys

Contact Info

Product

Resources

About