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. Additionally, through synthesis of a sputtered Inconel 725 film with a heterogeneous distribution of stored energy and subsequent aging treatments at 730°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.
Bahena, Joel A., et al. "Development of a heterogeneous nanostructure through abnormal recrystallization of a nanotwinned Ni superalloy." Acta Materialia, vol. 195, May. 2020. https://doi.org/10.1016/j.actamat.2020.05.057
Bahena, Joel A., Heckman, Nathan M., Barr, Christopher M., Hattar, Khalid, Boyce, Brad L., & Hodge, Andrea M. (2020). Development of a heterogeneous nanostructure through abnormal recrystallization of a nanotwinned Ni superalloy. Acta Materialia, 195. https://doi.org/10.1016/j.actamat.2020.05.057
Bahena, Joel A., Heckman, Nathan M., Barr, Christopher M., et al., "Development of a heterogeneous nanostructure through abnormal recrystallization of a nanotwinned Ni superalloy," Acta Materialia 195 (2020), https://doi.org/10.1016/j.actamat.2020.05.057
@article{osti_1778024,
author = {Bahena, Joel A. and Heckman, Nathan M. and Barr, Christopher M. and Hattar, Khalid and Boyce, Brad L. and Hodge, Andrea M.},
title = {Development of a heterogeneous nanostructure through abnormal recrystallization of a nanotwinned Ni superalloy},
annote = {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. Additionally, through synthesis of a sputtered Inconel 725 film with a heterogeneous distribution of stored energy and subsequent aging treatments at 730°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.},
doi = {10.1016/j.actamat.2020.05.057},
url = {https://www.osti.gov/biblio/1778024},
journal = {Acta Materialia},
issn = {ISSN 1359-6454},
volume = {195},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {05}}
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); US Office of Naval Research (ONR)