The microstructures and mechanical properties of powder metallurgy (PM) Ti-48A1-2Cr-2Nb-(0-1)W

Bulmer, S.

doi:10.22215/etd/2008-07713

Cited by 3 publications

(8 citation statements)

References 63 publications

(184 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gamma grains can also form in the aluminum rich interdendritic zones [31]. Heat treating just below the a transus can also result in a near lamellar structure [32], A duplex structure is typically formed by heat treating in the a+y phase field where upon cooling, the structure transforms into the duplex structure consisting of lamellar grains and single phase gamma grains [31,33]. Figure 9 shows specific treatment temperatures that can be used to form the four different microstructures.…”

Section: Microstructuresmentioning

confidence: 99%

“…Tungsten (W) can be effectively used to increase the creep resistance through the formation of P particles at the grain boundaries and lamellar interfaces [14,15,32,35].…”

Section: Tungstenmentioning

confidence: 99%

“…However, even if the desired microstructure and mechanical properties can be achieved at a research level, the cost and statistical success of full-scale production of the TiAl components must also be considered. The ongoing production of TiAl LPT blades for the GEnx engine by means 32 of investment casting has proven that full-scale production of TiAl components is economically feasible. With expansions to some of their plants, GE is expected to produce 50,000 blades per year by 2010 [41].…”

Section: Processingmentioning

confidence: 99%

See 2 more Smart Citations

Hot isostatic pressing and heat treatment development of powder metallurgy beta gamma titanium aluminide alloys

Laurin¹

View full text Add to dashboard Cite

Section: Microstructuresmentioning

confidence: 99%

“…Tungsten (W) can be effectively used to increase the creep resistance through the formation of P particles at the grain boundaries and lamellar interfaces [14,15,32,35].…”

Section: Tungstenmentioning

confidence: 99%

Section: Processingmentioning

confidence: 99%

See 1 more Smart Citation

Hot isostatic pressing and heat treatment development of powder metallurgy beta gamma titanium aluminide alloys

Laurin¹

View full text Add to dashboard Cite

“…The duplex microstructure is composed of equiaxed c grains mixed with FL grains, roughly of the same volume fraction. 11 The lamellar microstructure consists of alternating a 2 and c lamellae and can be formed by cooling along the path of aRazcRa 2 zc after heat treating within the single a phase region. 11 The duplex microstructure has good room temperature ductility and strength, but relatively poor creep resistance and fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

Oxidation behaviour of gamma titanium aluminides with or without protective coatings

Kim

Seo

Huang

et al. 2014

International Materials Reviews

View full text Add to dashboard Cite

The γ-TiAl alloys are promising high temperature materials for aeroengines due to their low density, high specific strength and low material cost compared with Nickel based superalloys. However, the insufficient ductility at room temperature and the limited oxidation resistance at temperatures above approximately 750°C have limited their applications. Oxidation resistance in the application temperature range of 800 and 1000°C is of particular importance. Remarkable improvement to the environmental resistance by adding ternary and quaternary elements to the γ-TiAl alloys has been reported; however, alloying additions frequently deteriorate their mechanical properties. Surface modifications or coatings, which promote the formation of highly protective alumina scales, are also viable ways to improve the environmental resistance of TiAl alloys. In this article, the research work from the last 30 years on the oxidation behaviour of bare and coated TiAl alloys will be reviewed, with special focus on the γ-TiAl alloys. The review will begin with the oxidation behaviour of TiAl substrate alloys and the oxidation behaviour of γ-TiAl alloys with high temperature coatings such as aluminide, MCrAlY, Ti–Al– X and thermal barrier coating (TBC) system will be followed.

show abstract

“…tensometer providing a strain resolution of +/-1.5x10 −5 . Details of the creep frame and associated set-up may be found in [120]. Strain measurements were recorded at 1…”

Section: Mechanical Testingmentioning

confidence: 99%

Joining of Powder Metallurgy Beta Gamma Titanium Aluminide Through Diffusion Brazing

Sawatzky¹

View full text Add to dashboard Cite

This thesis presents an experimental study of diffusion brazing powder metallurgy beta gamma titanium aluminide, along with a methodology utilizing pentenary equivalent beta forming effectiveness for the design of post bond heat treatments. Beta gamma titanium aluminides are attractive high temperature materials with low density and high specific strength. Adequate joining and repair methods, and the re-

show abstract

The microstructures and mechanical properties of powder metallurgy (PM) Ti-48A1-2Cr-2Nb-(0-1)W

Cited by 3 publications

References 63 publications

Hot isostatic pressing and heat treatment development of powder metallurgy beta gamma titanium aluminide alloys

Hot isostatic pressing and heat treatment development of powder metallurgy beta gamma titanium aluminide alloys

Oxidation behaviour of gamma titanium aluminides with or without protective coatings

Joining of Powder Metallurgy Beta Gamma Titanium Aluminide Through Diffusion Brazing

Contact Info

Product

Resources

About