Dynamic localized phase transformation at stacking faults during creep deformation and new criterion for superalloy design
Dynamic localized phase transformation at stacking faults during creep deformation and new criterion for superalloy design
复制标题
蠕变变形过程中堆垛层错的动态局部相变和高温合金设计的新准则
DOI：
10.1557/s43579-022-00251-z
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发表时间：
2022-09
影响因子：
1.9
通讯作者：
Longsheng Feng;A. Egan;Fei-Fei Xue-Fei;E. Marquis;Michael J. Mills;Yunzhi Wang
中科院分区：
文献类型：
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作者：
Longsheng Feng;A. Egan;Fei-Fei Xue-Fei;E. Marquis;Michael J. Mills;Yunzhi Wang
在各种镍基和钴基高温合金中观察到一种新的现象，即变形过程中层错处的动态局域相变（LPT），并发现其在决定这些合金的蠕变性能中起关键作用。在这篇文章中，我们回顾了最近的实验观察LPT，热力学分析的基本原理LPT，第一性原理计算联系LPT的机械变形，计算工具和数据库所需的预测LPT。我们讨论了LPT现象的普遍性，LPT，LPT强化和LPT软化的定量预测中的各种挑战，以及LPT机制在下一代LPT强化高温合金设计中提供的机会。图形摘要
A novel phenomenon, dynamic localized phase transformation (LPT) at stacking faults during deformation, has been observed in various Ni-base and Co-base superalloys and found to play a critical role in determining the creep performance of these alloys. In this article, we review recent experiment observations of LPT, thermodynamic analysis on the fundamentals of LPT, first-principles calculations to link LPT to mechanical deformation, and computational tools and databases required to predict LPT. We discussed the generality of the LPT phenomenon, various challenges in quantitative predictions of LPT, LPT-strengthening and LPT-softening, and opportunities offered by the LPT mechanism in the design of the next generation of LPT-strengthened superalloys. Graphical abstract