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首页> 外文期刊>Journal of Materials Science >Microcrack nucleation and its effect on the plastic deformation of FL gamma-TiAl alloy
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Microcrack nucleation and its effect on the plastic deformation of FL gamma-TiAl alloy

机译：微裂纹成核及其对FLγ-TiAl合金塑性变形的影响

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摘要

Microcracks and their effect on the plastic deformation of gamma-TiAl alloy with fully lamellar microstructure (FL) at relatively low strain rate (1 x 10(-5)/s) has been investigated. It is found that a large number of microcracks nucleate within the grains. The microcrack density increases with the increase of grain size. Most of the microcracks nucleate at the gamma/alpha(2) interfaces and gather at grains with soft-orientations. Based on the observation and analysis, a model of microcrack nucleation in FL gamma-TiAl alloy is built up. The plastic elongation of gamma-based TiAl alloys with FL microstructure changes non-monotonously with the increase of grain size, which results from cooperation of micro-deformations and microcracks. (C) 2004 Kluwer Academic Publishers. [References: 24]
机译：研究了微裂纹及其对具有相对较低应变速率（1 x 10（-5）/ s）的完全层状微结构（FL）的γ-TiAl合金塑性变形的影响。发现大量的微裂纹在晶粒内成核。微裂纹密度随着晶粒尺寸的增加而增加。大多数微裂纹在gamma / alpha（2）界面成核并聚集在具有软取向的晶粒上。在观察和分析的基础上，建立了FLγ-TiAl合金的微裂纹成核模型。具有微观组织的γ基TiAl合金的塑性伸长率随晶粒尺寸的增加而非单调变化，这是由于微观形变和微裂纹共同作用的结果。 （C）2004 Kluwer学术出版社。 [参考：24]

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