Article: A fine gamma' + alpha cellular structure in Fe-37.3 Wt Pct Ni-3.6 Wt Pct Al-3.3 Wt Pct Ti-0.2 Wt Pct C and its influence on high-temperature tensile properties

Fe-37.3 wt pct Ni-3.6 wt pct Al-3.3 wt pct Ti-0.2 wt pct C alloy, which reveals an excellent combination of high strength and good elongation endowed by formation of homogeneously dispersed fine gamma' precipitates in the matrix during aging at 823 K, has been investigated by means of transmission electron and optical microscopies, electron diffractions, and tensile tests. The influence of unique gamma' + alpha cellular products on the mechanical properties has also been studied. Because of low elastic mismatch between the austenitic gamma matrix and isomorphic gamma' precipitate phases, the homogeneously distributed precipitate particles, which formed at the early stage of aging, were ...

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