Laminated Fe-34.5 Mn-0.04C composite with high strength and ductility

Yuhui Wang^1,2，Jianmei Kang¹，Yan Peng²，Tiansheng Wang¹，Niels Hansen³，Xiaoxu Huang^4,5

1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University2. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University3. Ris? Campus, Technical University of Denmark4. College of Materials Science and Engineering, Chongqing University5. Department of Mechanical Engineering, Technical University of Denmark

摘 要：To obtain a good combination of strength and ductility, a laminated composite structure composed of recovered hard lamellae and soft recrystallized lamellae has been produced in a single phase austenitic Fe-34.5 Mn-0.04 C steel by cold rolling and partial recrystallization. Enhanced mechanical properties in both strength and ductility have been obtained in the composite structure compared to a fully recrystallized coarse grain structure. A further increase in strength with only minor loss in total elongation has been achieved by a slight cold rolling of the composite structure, which also removes the small yield drop and Lüders elongation observed in the composite structure.

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