Structural refinement and property optimization in an Fe-23Cr-8.5Ni duplex stainless steel

L. Xie, T. L. Huang, Y. H. Wang, L. Zhang, G. L. Wu, N. Tsuji, X. Huang

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Abstract

An Fe-23Cr-8.5Ni duplex stainless steel was used to prepare samples with different volume-fraction-weighted grain sizes (d(alpha gamma)), ranging from the nano-scale to the micrometer-scale by cold rolling and subsequent annealing. The cold rolled sample with d(alpha gamma) of 72 nm showed a high yield strength of about 1.3 GPa but only a small tensile elongation. An abrupt increase of ductility was observed as d(alpha gamma) increased to 375 nm, resulting in a good combination of yield strength of 738 MPa and tensile elongation of 29%. Further increase of d(alpha gamma) up to the micrometer-scale results in continued decreases in yield strength but with only a limited improvement in the ductility.
Original languageEnglish
JournalI O P Conference Series: Materials Science and Engineering
Volume219
ISSN1757-8981
DOIs
Publication statusPublished - 2017
Event38th Risø International Symposium on Materials Science - Technical University of Denmark , Roskilde, Denmark
Duration: 4 Sep 20178 Sep 2017

Conference

Conference38th Risø International Symposium on Materials Science
LocationTechnical University of Denmark
CountryDenmark
CityRoskilde
Period04/09/201708/09/2017

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