Deformation mechanisms in TiAl intermetallics—experiments and modeling

Marketz, W.; Fischer, F.D.; Clemens, Helmut

doi:10.1016/s0749-6419(01)00036-5

Cited by 117 publications

(54 citation statements)

References 48 publications

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“…Al concentration), orientation, impurity content of interstitial atoms and deformation temperature (Marketz et al 2003;Nakano et al 1996). It is now well established that the fundamental deformation mechanisms of Ti-rich γ -TiAl+α 2 -Ti 3 Al based alloys consist of ordinary slip 1/2<110]{111}, superdislocation slip <101]{111} as well as twin systems 1/6<112]{111} (Feng and Whang 2000;Fujiwara et al 1990;Gregori and Veyssiere 1999;Kawabata et al 1985).…”

Section: Deformation Mechanisms: Ti-rich Vs Al-rich Lamellar Tialmentioning

confidence: 99%

Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry

Chowdhury

Altenbach

Krüger

et al. 2017

Mech Adv Mater Mod Process

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In the last decades, the class of Ti-rich TiAl-based intermetallic materials has replaced many contemporary alloys till 900°C. Due to higher oxidation resistance, 20% lower density and higher (about 150°C more) operating temperature possibility of Al-rich TiAl alloys over Ti-rich side, phases from the Al-rich region of this alloy system are considered to be highly potential candidates for high temperature structural applications. Although there are a lot of works about Ti-rich alloys, however, investigation from the Al-rich side is very limited. This work reviews the class of Al-rich TiAl alloys in terms of phases, microstructures, morphology, deformation mechanisms, mechanical behaviors along with a possible micromechanical modeling approach. Single crystal like Ti-61.8at.%Al alloy from the Al-rich family has been chosen as an example for modeling high temperature anisotropy and tension-compression asymmetry. A possible comparison with Ti-rich side is also presented.

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Section: Deformation Mechanisms: Ti-rich Vs Al-rich Lamellar Tialmentioning

confidence: 99%

Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry

Chowdhury

Altenbach

Krüger

et al. 2017

Mech Adv Mater Mod Process

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“…Many studies have been undertaken on the mechanical properties and microstructure evolution of these materials [3,4]. However, in the literature to date, few of it reports the high strain rate response of TiAl materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of laser shock peening on microstructure and residual stress evolution in Ti–45Al–2Cr–2Nb–0.2B alloy

Qiao

Zhao

Zhang

et al. 2015

Surface and Coatings Technology

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“…The mechanical behavior of TiAl alloys strongly depends on their composition and in particular there is a considerable difference between single-phase and two-phase alloys [8,9]. The two-phase TiAl with Ti-rich compositions (Ti-48 at.% Al) shows higher strength and better ductility than the single-phase TiAl.…”

Section: Introductionmentioning

confidence: 99%

“…Grain size refinement and solution strengthening through W addition contribute to an increased hardness of TiAl alloys. Alloying elements, such as Mo and Nb, can improve tensile strength at room and elevated temperatures, but have little effect on improving room-temperature ductility [9,16]. The strength of TiAl alloys can also be enhanced by adding Ru (up to 1.4 at.%).…”

Section: Introductionmentioning

confidence: 99%

The Effects of Cr and Mo on the Microstructure and Mechanical Properties of As-Cast TiAl Alloys

2013

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Abstract. The effect of the microstructure and mechanical properties locally made arc-melting to identify the phases present in the samples. The micr samples was characterized using scanning electron microscop energy dispersive spectroscopy (EDS). Compression tests were carried out at room temperature using show that the Ti-48Al alloy exhibited addition of Cr a nearly lamellar microstructure was observed in Ti with the addition of both Cr and Mo values increased slightly the alloying elements. The presence of Cr in Ti increase in compressive fracture strain. produced a higher yield strength and fracture str to the other as-cast TiAl alloys. alloys, mixed brittle transgranular and interlamellar fracture modes were predominantly observed.

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Deformation mechanisms in TiAl intermetallics—experiments and modeling

Cited by 117 publications

References 48 publications

Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry

Reviewing the class of Al-rich Ti-Al alloys: modeling high temperature plastic anisotropy and asymmetry

Effects of laser shock peening on microstructure and residual stress evolution in Ti–45Al–2Cr–2Nb–0.2B alloy

The Effects of Cr and Mo on the Microstructure and Mechanical Properties of As-Cast TiAl Alloys

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