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Detecting the onset and progression of spinodal decomposition using transient grating spectroscopy

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By Mahmudul Islam, Avery Nguyen, Myles Stapelberg, Tomáš Grabec, Abigail Kaplan, Austin Wang, Austin J. Akey, Rodrigo Freitas, Michael Short, Maxwell Rae, Merrill K. Chiang, Angus P. C. Wylie, Saleem A. Al Dajani
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Abstract Spinodal decomposition can degrade corrosion resistance and embrittle materials. The ability to quickly, non-destructively detect spinodal decomposition via elastic property measurements before catastrophic materials degradation would represent a significant advance in materials testing. We demonstrate that spinodal decomposition can be detected in a binary Fe-Cr alloy via modulus stiffening using ex situ (and in situ) transient grating spectroscopy (TGS).
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