Improving the ductility of γ(TiAl) based alloy by introducing disordered β phase

Jiandong, Shi; Pu, Zhongjie; Zhong, Z.Y.; Zou, Dunxu

doi:10.1016/0956-716x(92)90079-t

Cited by 35 publications

(14 citation statements)

References 5 publications

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“…In contrast to that, non-isothermal hot-forging tests conducted on industrial-scale equipment showed that alloys with comparable composition exhibit good deformation behaviour at temperatures well below 1400 C [4,7]. Since ordered b 0 shows higher deformation resistance than disordered b, the validity of the predicted ordering temperature was questioned [22,23].…”

Section: Introductionmentioning

confidence: 83%

Phase fractions, transition and ordering temperatures in TiAl–Nb–Mo alloys: An in- and ex-situ study

et al. 2010

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Section: Introductionmentioning

confidence: 83%

Phase fractions, transition and ordering temperatures in TiAl–Nb–Mo alloys: An in- and ex-situ study

et al. 2010

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“…[33] These alloys can be heat treated to produce a combination of c-TiAl intermetallic (L1 0 structure), disordered BCC solid solution, and a B2 phase. These materials have excellent compressive ductility (> 35 %) and yield strengths above 700 MPa, but tensile properties (tensile ductility is much more difficult to achieve) have not been reported.…”

Section: Reviewsmentioning

confidence: 99%

Ductility in Intermetallic Compounds

Russell¹

2003

Adv Eng Mater

109

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Intermetallic compounds are comprised of two or more metallic elements, but unlike ordinary metals, they have bonding that is part metallic, part covalent, and part ionic. Because of their mixed bonding, they are often lighter, stronger, stiffer, and more corrosion‐resistant than ordinary metals, particularly at high temperatures. Yet their uses are limited because they are usually brittle at room temperature (RT), making them difficult to fabricate and vulnerable to fracture. These materials hold great promise to improve efficiency in the transportation, electric power generation, and chemical process industries; however, persistent problems with low ductility and poor fracture toughness have severely limited their use in engineering systems. This article presents an overview of the progress in improving the RT ductility and fracture toughness of intermetallic compounds and describes prospects for their near‐term engineering use.

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“…Broadening and even bifurcating of timelines provides evidences for the establishment of defect structures that can accommodate the plastic deformation imposed. At high temperatures, the β-phase is subjected to very high local strains due to its smaller flow stress compared to the α-phase [7,10]. Therefore, grains rotate fast and cause sharp dots to appear in the AT-plot.…”

Section: Resultsmentioning

confidence: 99%

Hot Deformation of Cast and Extruded TiAl: An <i>In Situ</i> Diffraction Study

Schmoelzer

Liss

Mayer

et al. 2012

MSF

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Intermetallic TiAl alloys are a class of innovative high-temperature materials which are developed to replace the substantially denser Ni-base alloys in low-pressure turbine blades of jet engines. By streamlining the production process of these parts, a substantial decrease in production costs can be achieved. To this end, a profound knowledge of the microstructural processes occurring during hot deformation is a prerequisite. To investigate the microstructural development during forming operations, cast and extruded as well as only cast specimens were hot-deformed and the microstructural development investigated in-situ by means of a novel diffraction method. This powder diffraction method utilizes the behavior of individual reflection spots on the Debye-Scherrer rings for deriving the materials response to the deformation imposed. It was found that the behavior of the two specimens is rather similar, although the starting microstructures show pronounced differences.

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Improving the ductility of γ(TiAl) based alloy by introducing disordered β phase

Cited by 35 publications

References 5 publications

Phase fractions, transition and ordering temperatures in TiAl–Nb–Mo alloys: An in- and ex-situ study

Phase fractions, transition and ordering temperatures in TiAl–Nb–Mo alloys: An in- and ex-situ study

Ductility in Intermetallic Compounds

Hot Deformation of Cast and Extruded TiAl: An <i>In Situ</i> Diffraction Study

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