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首页> 外文期刊>Zeitschrift fur Angewandte Mathematik und Mechanik >The role of twinning during deformation of gamma-TiAl based alloys
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The role of twinning during deformation of gamma-TiAl based alloys

机译：孪晶在γ-TiAl基合金变形中的作用

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In the crystal-plastic description of the deformation behaviour of gamma-TiAl-Intermetallics twinning appears as a mode of plastic deformation to take into consideration in addition to crystallographic slip. Our approach to describe the twinning mechanism based on a critical shear stress criterion in an analogous way to Schmid's late for crystallographic slip. This means that the shear stress on the twin plane, resolved in the twinning direction, is the driving force for the nucleation and growth of the twins. This paper investigates the importance of twinning as a deformation mechanism by using a micromechanical model based on the finite element method. Computational simulations investigating lamellar as well as so-tailed "near-gamma"-TiAl microstructures are carried out. [References: 17]
机译：在对γ-TiAl-金属间化合物的变形行为进行结晶塑性描述时，除结晶滑移外，孪晶还作为塑性变形的一种方式出现。我们的方法基于临界剪应力准则来描述孪晶机理，其方法类似于Schmid的结晶滑移法。这意味着在孪晶方向上分解的孪晶平面上的剪切应力是孪晶成核和生长的驱动力。本文通过基于有限元方法的微机械模型研究孪晶作为变形机制的重要性。进行了研究层状和最终“近γ” -TiAl微观结构的计算模拟。 [参考：17]

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