9R phase enabled superior radiation stability of nanotwinned Cu alloys via in situ radiation at elevated temperature
Journal Article
·
· Acta Materialia
- Purdue Univ., West Lafayette, IN (United States)
- Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
- Univ. of North Carolina, Charlotte, NC (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Purdue Univ., West Lafayette, IN (United States); School of Electrical and Computer Engineering, West Lafayette, IN (United States)
Nanotwinned metals exhibit outstanding radiation tolerance as twin boundaries effectively engage, transport and eliminate radiation-induced defects. However, radiation-induced detwinning may reduce the radiation tolerance associated with twin boundaries, especially at elevated temperatures. Here we show, via in-situ Kr ion irradiation inside a transmission electron microscope, that 3 at. % Fe in epitaxial nanotwinned Cu (Cu97Fe3) significantly improves the thermal and radiation stability of nanotwins during radiation up to 5 displacements-per-atom at 200 °C. Such enhanced stability of nanotwins is attributed to a diffuse 9R phase resulted from the dissociation of incoherent twin boundaries in nanotwinned Cu97Fe3. The mechanisms for the enhanced stability of twin boundaries in irradiated nanotwinned alloys are discussed. As a result, the stabilization of nano-twins opens up opportunity for the application of nanotwinned alloys for aggressive radiation environments.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- Grant/Contract Number:
- AC02-06CH11357; SC0016337
- OSTI ID:
- 1495014
- Alternate ID(s):
- OSTI ID: 1637024
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 167; ISSN 1359-6454
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Dual Beam In Situ Radiation Studies of Nanocrystalline Cu
|
journal | August 2019 |
Recent Studies on the Microstructural Response of Nanotwinned Metals to In Situ Heavy Ion Irradiation
|
journal | November 2019 |
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