When a material that contains precipitates is deformed, the precipitates and the matrix may strain plastically by different amounts causing stresses to build up at the precipitate-matrix interfaces. If premature failure is to be avoided, it is therefore essential to reduce the difference in the plastic strain between the two phases. Here, we conduct nanoscale digital image correlation to measure a new variable that quantifies this plastic strain difference and show how its value can be used to estimate the associated interfacial stresses, which are found to be approximately three times greater in an Fe-Ni2AlTi steel than in the more ductile Ni-based superalloy CMSX-4®. It is then demonstrated that decreasing these stresses significantly improves the ability of the Fe-Ni2AlTi microstructure to deform under tensile loads without loss in strength.
Jones, R. D., et al. "Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys." Scientific Reports, vol. 8, no. 1, Jun. 2018. https://doi.org/10.1038/s41598-018-26917-0
Jones, R. D., Di Gioacchino, F., Lim, H., Edwards, T. E. J., Schwalbe, C., Battaile, C. C., & Clegg, W. J. (2018). Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys. Scientific Reports, 8(1). https://doi.org/10.1038/s41598-018-26917-0
Jones, R. D., Di Gioacchino, F., Lim, H., et al., "Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys," Scientific Reports 8, no. 1 (2018), https://doi.org/10.1038/s41598-018-26917-0
@article{osti_1469632,
author = {Jones, R. D. and Di Gioacchino, F. and Lim, H. and Edwards, T. E. J. and Schwalbe, C. and Battaile, C. C. and Clegg, W. J.},
title = {Reduced partitioning of plastic strain for strong and yet ductile precipitate-strengthened alloys},
annote = {When a material that contains precipitates is deformed, the precipitates and the matrix may strain plastically by different amounts causing stresses to build up at the precipitate-matrix interfaces. If premature failure is to be avoided, it is therefore essential to reduce the difference in the plastic strain between the two phases. Here, we conduct nanoscale digital image correlation to measure a new variable that quantifies this plastic strain difference and show how its value can be used to estimate the associated interfacial stresses, which are found to be approximately three times greater in an Fe-Ni2AlTi steel than in the more ductile Ni-based superalloy CMSX-4®. It is then demonstrated that decreasing these stresses significantly improves the ability of the Fe-Ni2AlTi microstructure to deform under tensile loads without loss in strength.},
doi = {10.1038/s41598-018-26917-0},
url = {https://www.osti.gov/biblio/1469632},
journal = {Scientific Reports},
issn = {ISSN 2045-2322},
number = {1},
volume = {8},
place = {United States},
publisher = {Nature Publishing Group},
year = {2018},
month = {06}}
Bettanini, Alvise Miotti; Delannay, Laurent; Jacques, Pascal J.
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF GLOBAL NETWORK FOR INNOVATIVE TECHNOLOGY AND AWAM INTERNATIONAL CONFERENCE IN CIVIL ENGINEERING (IGNITE-AICCE’17): Sustainable Technology And Practice For Infrastructure and Community Resilience, AIP Conference Proceedingshttps://doi.org/10.1063/1.5007967