Influence of lattice misfit on the deformation behaviour of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e810" altimg="si26.svg"><mml:msub><mml:mrow><mml:mi>α</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math>/<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e820" altimg="si27.svg"><mml:mi>γ</mml:mi></mml:math> lamellae in TiAl alloys

Chauniyal, Ashish; Janisch, Rebecca

doi:10.1016/j.msea.2020.140053

Cited by 22 publications

(5 citation statements)

References 26 publications

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“…However, macroscopically thinner lamellae within the α 2 /γ colonies would result in a strain localization along the colony boundaries and thus higher tendency for crack initiation [32,39]. Also, a change in the α 2 /γ ratio and significantly lower lamellar spacing are reported to affect coherency [19,62]. Furthermore, the presence of small globular γ grains along different interfaces may improve fracture behavior.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, in several studies, the formation of cracks along semicoherent α 2 /γ interfaces is reported to take place due to the limited number of available glide systems [16,17,18,19]. This results in a preferred crack propagation along the aforementioned interface type due to local stress concentrations within α 2 /γ colonies [20,21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, crack-tip blunting by ductile phases, shear ligament toughening, twinning, and crack-tip interface debonding are also considered to enhance the crack resistance at the micro-scale [12,35,37]. Therefore, the deformability of γ lamellae due to mechanical twinning or slip of dislocations within the plastic zone in front of the crack tip and the interaction with adjacent γ or α 2 lamellae has to be considered [19,21,23,32,38,39].…”

Section: Introductionmentioning

confidence: 99%

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In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloy

et al. 2020

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloy

et al. 2020

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“…The level of misfit δ around the interface between Y 2 O 3 particle and TiAl matrix can be calculated according to [58]:…”

Section: Twins and Nanoparticle/matrix Interface In Pbf-eb Y 2 O 3 /T...mentioning

confidence: 99%

Electron Beam Powder Bed Fusion of Y2o3/Γ-Tial Nanocomposite with Balanced Strength and Toughness

Gao¹,

Hui²,

Yue

et al. 2023

Preprint

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“…Several studies have focused on the relationship between γ lath and ductility. Chauniyal et al [121] reported that the γ-lath fraction is the dominant factor when the load direction is parallel to the lamellar interface, while the lamellar spacing is the dominant factor when the loading direction is perpendicular to the semi-coherent lamellar interface by atomistic simulation. Droessler et al [110] reported that the increase of γ-lath fraction leads to a substantial increment of RT strain without changing the hardness greatly.…”

Section: Dctilitymentioning

confidence: 99%

Microstructure Design and Its Effect on Mechanical Properties in Gamma Titanium Aluminides

Liu

Lin

Zhang

et al. 2021

Metals

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Intermetallic gamma titanium aluminides display attractive engineering properties at high temperatures of up to 750 °C. To date, they have been used in low-pressure turbine blades and turbocharger rotors in advanced aircraft and automotive engines. This review summarizes the fundamental information of the Ti–Al system. After providing the development of TiAl alloys, typical phases, microstructures and their characteristics in TiAl alloys, the paper focuses on the effects of alloying elements on the phase boundary shifting, stabilizing effects and strengthening mechanism. The relationships between chemical additions, microstructure evolution and mechanical properties of the alloy are discussed. In parallel, the processing technologies and the common heat treatment methods are described in detail, both of which are applied to optimize the mechanical properties via adjusting microstructures. On this basis, the effects from chemical composition, processing technologies and heat treatments on microstructure, which controls the mechanical properties, can be obtained. It has a certain guiding significance for tailoring the microstructures to gain desired mechanical properties.

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Influence of lattice misfit on the deformation behaviour of α2/γ lamellae in TiAl alloys

Cited by 22 publications

References 26 publications

In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloy

In situ fracture observations of distinct interface types within a fully lamellar intermetallic TiAl alloy

Electron Beam Powder Bed Fusion of Y2o3/Γ-Tial Nanocomposite with Balanced Strength and Toughness

Microstructure Design and Its Effect on Mechanical Properties in Gamma Titanium Aluminides

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