期刊
ACTA MATERIALIA
卷 195, 期 -, 页码 132-140出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2020.05.057
关键词
Nanotwins; Abnormal recrystallization; Heterogeneity; superalloys; Nanostructured metals
资金
- National Science Foundation [DMR-1709771]
- Office of Naval Research [N00014-18-1-2617]
- United States Department of Energy, Office of Basic Energy Sciences (BES), Division of Materials Science and Engineering
- NSF
- ONR
- BES grant
- U.S. Department of Energy's National Nuclear Security Administration [DENA0003525]
This work explores the development of a heterogeneous nanostructured material through leveraging abnormal recrystallization, which is a prominent phenomenon in coarse-grained Ni-based superalloys. Through synthesis of a sputtered Inconel 725 film with a heterogeneous distribution of stored energy and subsequent aging treatments at 730 degrees C, a unique combination of grain sizes and morphologies was observed throughout the thickness of the material. Three distinct domains are formed in the aged microstructure, where abnormally large grains are observed in-between a nanocrystalline and a nanotwinned region. In order to investigate the transitions towards a heterogeneous structure, crystallographic orientation and elemental mapping at interval aging times up to 8 h revealed the microstructural evolution and precipitation behavior. From the experimental observations and the detailed analysis of this study, the current methodology can be utilized to further expand the design space of current heterogeneous nanostructured materials. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据