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Fault energy calculating method for L10 type intermetallic TiAl

A technology of intermetallic compounds and calculation methods, applied in the field of calculation of stacking fault energy in L10 type intermetallic compound TiAl, can solve problems such as large calculation errors

Inactive Publication Date: 2002-04-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the calculation error is large

Method used

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  • Fault energy calculating method for L10 type intermetallic TiAl
  • Fault energy calculating method for L10 type intermetallic TiAl
  • Fault energy calculating method for L10 type intermetallic TiAl

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Experimental program
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Embodiment Construction

[0014] Analyze the situation of [10 1] and 1 / 2[11 2] superdislocations in TiAl alloy under double decomposition, the decomposition formula is (taken from literature [6]):

[0015] [10 1]→1 / 6[11 2]+SISF+1 / 6[5 14] (12)

[0016] [10 1]→1 / 3[2 1 1]+SISF+1 / 3[11 2] (13)

[0017] 1 / 2[11 2]→1 / 6 figure 2 . For comparison, the isotropic calculation results are also shown in the figure.

[0018] Depend on figure 2 It can be seen from the calculation results that under the calculation conditions of the present invention, the decomposition width of its super dislocation is obviously smaller than that under elastic isotropy, that is to say, when calculating the stacking fault energy from the dislocation decomposition width measured in experiments, The stacking fault energy calculated by the calculation method of the present invention is smaller than that of elastic isotropy. figure 1 The actual WBTEM of the width of figure 1 It can be seen that under the condition of isotropy, ...

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Abstract

The fault energy calculating method for L10 type intermetallic compound TiAl is based on the balance between the fault energy and the elastic energy amount the sub-dislocations around the lamination fault. It considers the effect of shearing modulus and Poisson's ratio in different crystallographic planes and directions of the L10 type of intermetallic compound on the calculation of fault energy. The creative calculation method is based on the physical model and calculation formula for elastic isotropic medium and considers the effect of elastic anisotropy by introducing direction related shearing modulus and Poisson's ratio. The calculation method of the present invention is simple and visual and has calculation result according with experiment result.

Description

Technical field: [0001] The present invention relates to a method for calculating L1 0 Method for stacking fault energy in intermetallic compound TiAl. This method is based on the calculation of the balance between the stacking fault energy and the elastic action energy between the component dislocations surrounding the stacking fault, taking into account the L1 0 Effects of shear modulus and Poisson's ratio on different crystallographic planes and directions in a type intermetallic compound on the calculated stacking fault energy. Background technique: [0002] In principle, the calculation of the stacking fault energy is based on the elastic interaction energy (f 12 ) repulsion and stacking fault energy (γ) reciprocity balance relationship to calculate, that is: γ = f 12 = G × b → 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/20
Inventor 宋西平陈国良林均品惠希东王艳丽
Owner UNIV OF SCI & TECH BEIJING