Microstructural evolution and mechanical properties of a high yttrium containing TiAl based alloy densified by spark plasma sintering

Gu, Xiaofeng; Cao, Fuyang; Liu, Na; Zhang, Guoqing; Yang, Dongye; Shen, Hongxian; Zhang, Dongdong; Song, Heqian; Sun, Jianfei

doi:10.1016/j.jallcom.2019.153264

Cited by 18 publications

(11 citation statements)

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“…Voluntarily, a process control agent (PCA) is also added to aid in minimising cold welding and lump formation. Collisions between the wall of the Several studies involving the use of GA and SPS have been carried out to date [27][28][29][30]. Gu et al [27] fabricated pre-alloyed (PA) Ti-43Al-5Nb-2V-Y (at.…”

Section: Mechanical Milling (Mm)mentioning

confidence: 99%

“…Fully densified γ-TiAl alloys with less residual porosity can be successfully produced using SPS. It has been proved countlessly [27,[103][104][105][106] that the superior properties of these alloys can also be achieved by optimising SPS parameters. A fully densified γ-TiAl by SPS will have three distinctive microstructures namely, equiaxed γ grains, DP and lamella colonies having alternating layers of α 2 and γ phase [9,103,107].…”

Section: Microstructure-property Relationsmentioning

confidence: 99%

“…In a recent study, Gu and associates [27] produced a PA TiAl alloy with added yttrium using SPS. The microstructures (in Figure 12) obtained were DP, NL and FL by employing varying sintering temperatures ranging from 100 up to 1250 • C at a sintering pressure of 40 MPa.…”

Section: Microstructure-property Relationsmentioning

confidence: 99%

“…Scanning electron microscope (SEM) images of yttrium added TiAl alloys produced by SPS with (a) outer part of sample sintered at 1100 °C; (b) center of sample sintered at 1150 °C; (c) sample sintered at 1200 °C; and (d) 1250 °C (reproduced from[27], with permission from Elsevier, 2020).…”

mentioning

confidence: 99%

“…Stress-strain plots at room temperature (RT) of yttrium added TiAl alloys produced by SPS, reproduced from[27], with permission from Elsevier, 2020.…”

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confidence: 99%

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

Mogale

Matizamhuka

2020

Metals

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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.

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Section: Mechanical Milling (Mm)mentioning

confidence: 99%

Section: Microstructure-property Relationsmentioning

confidence: 99%

Section: Microstructure-property Relationsmentioning

confidence: 99%

mentioning

confidence: 99%

“…Stress-strain plots at room temperature (RT) of yttrium added TiAl alloys produced by SPS, reproduced from[27], with permission from Elsevier, 2020.…”

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