Influence of thermo-mechanical treatment on the precipitation strengthening behavior of Inconel 740, a Ni-based superalloy
Influence of thermo-mechanical treatment on the precipitation strengthening behavior of Inconel 740, a Ni-based superalloy
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DOI：
10.1557/jmr.2011.70
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发表时间：
2011-05
影响因子：
2.7
通讯作者：
Jun-Hak Oh;Byung-Gil Yoo;In-Chul Choi;M. Santella;J. Jang
中科院分区：
文献类型：
--
作者：
Jun-Hak Oh;Byung-Gil Yoo;In-Chul Choi;M. Santella;J. Jang
在这项工作中，我们系统地研究了热处理对镍基高温合金Inconel740的析出行为及其强化的影响，在700℃下施加不同水平的应力，随着施加应力的增加，伽马析出物的比例增加(没有明显的尺寸变化)，纳米压痕硬度提高。从异质形核的自由能垒和析出强化的主要机制讨论了应力效应。
In this work, we have systematically explored the influence of thermo-mechanical treatment on the precipitation behavior and its strengthening in Inconel 740, a relatively new Ni-based superalloy, using specimens on which different levels of stresses were applied at 700 °C. With increasing applied stress, fraction of gamma prime precipitates increased (without significant size change) and nanoindentation hardness was enhanced. The stress effects were discussed in terms of the free energy barrier for heterogeneous nucleation and the prevailing mechanisms of precipitation strengthening.