Measuring Effects of Radiation on Precipitates in Aluminum 7075-T6 Using Differential Scanning Calorimetry
Name
v009t16a090-icone26-82457.pdf
Description
Published version
Size
1.2 MB
Format
Adobe PDF
Checksum (MD5)
eb80aed20ea67424ff9442ec919b6c31
Author(s)
Connick, Rachel C.
Hirst, Charles A.
Cao, Penghui
So, Kangpyo
Kemp, Ronald S.
Short, Michael P
Date Issued
October 2018
Journal
International Conference on Nuclear Engineering
Publisher
American Society of Mechanical Engineers (ASME)
Citation
Connick, Rachel C. et al. "Measuring Effects of Radiation on Precipitates in Aluminum 7075-T6 Using Differential Scanning Calorimetry." International Conference on Nuclear Engineering, July 2018, London, England, American Society of Mechanical Engineers, October 2018 © 2018 ASME
Version
Final published version
Abstract
Radiation damage in structural materials for nuclear applications is not well-understood, especially when linking the atomic scale damage mechanisms to the macroscopic effects. On a microscopic level, particle radiation creates defects that can accumulate in the material. Defects can also interact with existing features in the material. Since both defects and features have different energies associated with them, investigation of the resulting energy spectrum in a macroscopic sample may offer insight into the connection between microscopic damage and macroscopic properties. In alloys, changes in the size and number of precipitates will be reflected in the amount of energy required to dissolve the precipitates during thermal analysis. This can then be studied using differential scanning calorimetry (DSC). This work explores the sensitivity of the DSC measurement to detect irradiation-induced instability in metastable and secondary phase precipitates in the high-strength aluminum alloy 7075-T6 for extremely low doses of helium-ion and neutron irradiation. The precipitates in aluminum 7075-T6 are expected to grow or shrink, changing the energy spectrum measured by DSC. The magnitude of the change can then be compared to a model of irradiation-induced phase instability. This will demonstrate the ability of this thermal analysis technique to help bridge the gap between microscopic radiation effects and macroscopic properties.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1115/ICONE26-82457
