Effect of ageing on the properties of the W-containing IRIS-TiAl alloy

@article{Couret2020EffectOA,
  title={Effect of ageing on the properties of the W-containing IRIS-TiAl alloy},
  author={Alain Couret and David Reyes and Marc Thomas and Nicolas Ratel-Ramond and Christophe Deshayes and Jean-Philippe Monchoux},
  journal={Acta Materialia},
  year={2020},
  volume={199},
  pages={169-180}
}
Abstract The effects of ageing at 800 °C on the properties of the IRIS alloy (Ti49.9Al48W2B0.1) are studied. The initial microstructure of this alloy densified by Spark Plasma Sintering (SPS) is mainly composed of lamellar colonies which are surrounded by γ grains. The evolutions of the alloy strength and creep resistance resulting from this ageing treatment are measured by the related mechanical tests. The microstructural changes are investigated by scanning and transmission electron… 
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References

SHOWING 1-10 OF 61 REFERENCES
Mechanical Properties of the TiAl IRIS Alloy
This paper presents a study of the mechanical properties at room and high temperature of the boron and tungsten containing IRIS alloy (Ti-48Al-2W-0.08B at. pct). This alloy was densified by Spark
On the high creep strength of the W containing IRIS-TiAl alloy at 850 °C
This paper presents a study of the creep at 850°C under 150 MPa of the IRIS alloy (Ti-Al48-W2-B0.1) densified by spark plasma sintering. The dislocation microstructure in a sample strained up to 1.5%
Microstructures and deformation mechanisms of a G4 TiAl alloy produced by spark plasma sintering
Abstract TiAl alloys are prepared by spark plasma sintering (SPS) using a pre-alloyed powder with the so-called G4 composition (Ti 51 Al 47 Re 1 W 1 Si 0.2 ). SPS densifications are conducted using
Refinement of lamellar microstructures by boron incorporation in GE-TiAl alloys processed by Spark Plasma Sintering
Abstract The aim of this study is to check the efficiency of boron in refining lamellar microstructures of TiAl alloys densified by Spark Plasma Sintering. Boron-containing TiAl47Cr2Nb2B0.6 and
Obtaining of a fine near-lamellar microstructure in TiAl alloys by Spark Plasma Sintering
Abstract This work presents a study of the Spark Plasma Sintering of a boron and tungsten containing alloy (Ti 49,92 Al 48 W 2 B 0,08 , called IRIS) as a function of the sintering temperature.
Microstructure study of a γ-TiAl based alloy containing W and Si
The phase transformations and modulated microstructures in the cast alloy Ti-47Al-2W-0.5Si(at.%) have been studied. It has been shown that microstructure is sensitive to heat treatment and
Influence of microstructure on tensile and creep properties of a new castable TiAl-based alloy
Snecma Motors has been working on the development of γ-TiAl low-pressure turbine blades, including manufacturing optimization, castability evaluation of a selected alloy called G4, and heat-treatment
Primary creep at 750 °C in two cast and PM Ti48Al48Cr2Nb2 alloys
Abstract The primary creep of two Ti 48 Al 48 Cr 2 Nb 2 alloys produced by cast (C) and powder metallurgy (PM) routes is investigated at 750 °C, under 150 and 80 MPa, respectively. A higher primary
The effect of heat treatments on the microstructural stability of the intermetallic Ti–46.5Al–2W–0.5Si
Abstract The effect of heat treatment on the microstructure of a γ-based TiAl alloy containing W and Si has been studied. The starting microstructure of a cast and heat-treated commercial γ-based
B2 precipitates and distribution of W in a Ti–47Al–2W–0.5Si alloy
The precipitation behavior of B2 particles and the distribution of W in a Ti-47Al-2W-0.5Si alloy were investigated using high-spatial resolution analytical electron microscopy (AEM) and
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