Increase in γ/α_2 Lamellar Boundary Density and its Effect on Creep Resistance of TiAl Alloy

机译：γ/α_2层状边界密度的增加及其对TiAl合金抗蠕变性的影响

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Several lamellar microstructures of a Ti-48 % Al alloy were made by changing heating rate in the α+γ dual phase field, and their creep properties were investigated at 1150 K. Average spacing and average length of α_2 lamellae decrease with increasing heating rate. The decrease of α_2 lamellar spacing is most effective at lower heating rate, and minimum creep rate decreases with increasing the heating rate, since a high density of γ/α_2 boundaries stabilizes lamellar microstructure during creep. On the other hand creep rate increases at high heating rate, since α_2 lamellar length becomes shorter with increasing heating rate. A reduction of creep rate by one order of magnitude is achieved at the optimum heating rate providing the best combination of narrow spacing and sufficiently long length of α_2 lamellae.

机译：通过改变α+γ双相场中的升温速率，制备了几种Ti-48％铝合金的层状显微组织，研究了它们在1150 K下的蠕变性能。随着升温速率的增加，α_2片的平均间距和平均长度减小。 α_2层间距的减小在较低的加热速率下最为有效，最小蠕变速率随着加热速率的增加而降低，因为高密度的γ/α_2边界稳定了蠕变过程中的层状微结构。另一方面，在高加热速率下蠕变速率增加，这是因为随着加热速率增加，α_2层状长度变短。在最佳加热速率下，蠕变速率降低了一个数量级，从而提供了窄间距和足够长的α_2薄片长度的最佳组合。

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《Symposium Proceedings vol.842; Symposium on Integrative and Interdisciplinary Aspects of Intermetallics; 20041129-1201; Boston,MA(US)》|2004年|P.109-114|共6页
会议地点 BostonMA(US)
作者
Kouichi Maruyama; Jun Matsuda; Hanliang Zhu;
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Graduate School of Environmental Studies, Tohoku University 6-6-02 Aobayama, Aoba-ku, Sendai 980-8579, Japan;

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正文语种 eng
中图分类材料;
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1. Creep of lamellar TiAl alloys: degradation, stabilization and design of lamellar boundaries [J] . Kouichi Maruyama, Hee Y. Kim, Hanliang Zhu Materials Science and Engineering. A, Structural Materials . 2004,第Dec期

机译：层状TiAl合金的蠕变：层状边界的降解，稳定化和设计
2. Effect of Creep Strain on Microstructural Stability and Creep Resistance of a TiAl/Ti_3Al Lamellar Alloy [J] . J.A. WERT, M.F. BARTHOLOMEUSZ Metallurgical and materials transactions. A, physical metallurgy and materials science . 1996,第1期

机译：蠕变应变对TiAl / Ti_3Al层状合金微结构稳定性和抗蠕变性的影响
3. Effect of Creep Strain on Microstructural Stability and Creep Resistance of a TiAl/Ti_3Al Lamellar Alloy [J] . Wert J.A., Bartholomeusz M.F. Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science . 1996,第1期

机译：蠕变应变对TiAl / Ti_3Al层状合金微结构稳定性和抗蠕变性的影响
4. Increase in γ/α_2 Lamellar Boundary Density and its Effect on Creep Resistance of TiAl Alloy [C] . Kouichi Maruyama, Jun Matsuda, Hanliang Zhu Symposium on Integrative and Interdisciplinary Aspects of Intermetallics . 2005

机译：γ/α_2层边界密度增加及其对Tial合金蠕变电阻的影响
5. Role of a thermo-mechanical treatment on the subgrain boundary density and on creep behavior of ferritic-martensitic alloy T91. [D] . Gupta, Gaurav. 2007

机译：热机械处理对铁素体-马氏体合金T91的亚晶界密度和蠕变行为的作用。
6. Accessing Colony Boundary Strengthening of Fully Lamellar TiAl Alloys via Micromechanical Modeling [O] . Jan Eike Schnabel, Swantje Bargmann 2017

机译：通过微机械模型获得全层状TiAl合金的集落边界强化
7. Crystal Plasticity Modeling of Creep in Alloys with Lamellar Microstructures at the Example of Fully Lamellar TiAl [O] . Jan E. Schnabel, Ingo Scheider 2021

机译：蠕变在整个层状下层的蠕变中蠕变中的晶体塑性建模
8. Creep mechanisms and interface-enhanced deformation twinning in a two-phase lamellar TiAl alloy [R] . Hsiung, L. M. 1997

机译：两相层状Tial合金中的蠕变机制和界面增强变形孪晶

Increase in γ/α_2 Lamellar Boundary Density and its Effect on Creep Resistance of TiAl Alloy

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