Interaction between deformation and lamellar interfaces in polysynthetically twinned (PST) crystal of TiAl

Mingwei Chen; Da Chen; Dening Wang; Dongliang Lin

Interaction between deformation and lamellar interfaces in polysynthetically twinned (PST) crystal of TiAl

Mingwei Chen, Da Chen, Dening Wang, Dongliang Lin

Research output: Contribution to journal › Article › peer-review

Abstract

Interactions between gliding dislocation and twins with lamellar interfaces have been studied by TEM. It is found that α₂/γ interfaces severely inhibit the twin propagation and dislocation glide, which induces high yield strength and low plasticity at the hardening orientation in PST crystals. There exists the change of deformation mode from twinning to dislocation gliding at γ/γM and γ/γP interfaces, which results from the facts that interfaces inhibit the twin propagation and accommodate the deformation. Comparatively, γ/γT interfaces have less effect on inhibiting the deformation process.

Original language	English
Pages (from-to)	7-10
Number of pages	4
Journal	Cailiao Gongcheng/Journal of Materials Engineering
Issue number	1
Publication status	Published - 1998 Dec 1

ASJC Scopus subject areas

Aerospace Engineering

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title = "Interaction between deformation and lamellar interfaces in polysynthetically twinned (PST) crystal of TiAl",

abstract = "Interactions between gliding dislocation and twins with lamellar interfaces have been studied by TEM. It is found that α2/γ interfaces severely inhibit the twin propagation and dislocation glide, which induces high yield strength and low plasticity at the hardening orientation in PST crystals. There exists the change of deformation mode from twinning to dislocation gliding at γ/γM and γ/γP interfaces, which results from the facts that interfaces inhibit the twin propagation and accommodate the deformation. Comparatively, γ/γT interfaces have less effect on inhibiting the deformation process.",

author = "Mingwei Chen and Da Chen and Dening Wang and Dongliang Lin",

year = "1998",

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language = "English",

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journal = "Cailiao Gongcheng/Journal of Materials Engineering",

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publisher = "Beijing Institute of Aeronautical Materials (BIAM)",

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AU - Chen, Mingwei

AU - Chen, Da

AU - Wang, Dening

AU - Lin, Dongliang

PY - 1998/12/1

Y1 - 1998/12/1

N2 - Interactions between gliding dislocation and twins with lamellar interfaces have been studied by TEM. It is found that α2/γ interfaces severely inhibit the twin propagation and dislocation glide, which induces high yield strength and low plasticity at the hardening orientation in PST crystals. There exists the change of deformation mode from twinning to dislocation gliding at γ/γM and γ/γP interfaces, which results from the facts that interfaces inhibit the twin propagation and accommodate the deformation. Comparatively, γ/γT interfaces have less effect on inhibiting the deformation process.

AB - Interactions between gliding dislocation and twins with lamellar interfaces have been studied by TEM. It is found that α2/γ interfaces severely inhibit the twin propagation and dislocation glide, which induces high yield strength and low plasticity at the hardening orientation in PST crystals. There exists the change of deformation mode from twinning to dislocation gliding at γ/γM and γ/γP interfaces, which results from the facts that interfaces inhibit the twin propagation and accommodate the deformation. Comparatively, γ/γT interfaces have less effect on inhibiting the deformation process.

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