Abstract
S32750 dual-phase stainless steel (DSS) wires were prepared by cold drawing with a strain of ε = 0~3.6. The mechanical behavior and microstructural evolution of these DSS wires at different strains were investigated. Specifically, the yield strength and ultimate tensile strength of a S32750 DSS wire at a strain of ε = 3.6 reached 1771 MPa and 1952 MPa, respectively. The microstructure of the wire was transformed into a heterogeneous microstructure, which consisted of ferrite fiber grains and a nanofibrous grain structure consisting of austenite and strain-induced martensite nanofiber grains. A sub-grain structure was observed inside the ferrite fiber. The austenitic phase followed the evolutionary steps of stacking faults, twinning, ε-martensite, α-martensite, and, finally, austenite, before transitioning into a nanofibrous grain structure. This nanofibrous grain structure significantly contributed to the strength compared with the relatively coarse ferrite phase.
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MDPI and ACS Style
Gao, H.; An, Z.; Yao, L.; Wang, J.; Zhai, L.; Ding, B.; Peng, J.; Zhou, L.; Cao, X.
Microstructural Evolution and Strengthening of Dual-Phase Stainless Steel S32750 during Heavily Cold Drawing. Crystals 2024, 14, 621.
https://doi.org/10.3390/cryst14070621
AMA Style
Gao H, An Z, Yao L, Wang J, Zhai L, Ding B, Peng J, Zhou L, Cao X.
Microstructural Evolution and Strengthening of Dual-Phase Stainless Steel S32750 during Heavily Cold Drawing. Crystals. 2024; 14(7):621.
https://doi.org/10.3390/cryst14070621
Chicago/Turabian Style
Gao, Hong, Zhixun An, Liang Yao, Jianyong Wang, Lili Zhai, Binhua Ding, Jin Peng, Lichu Zhou, and Xia Cao.
2024. "Microstructural Evolution and Strengthening of Dual-Phase Stainless Steel S32750 during Heavily Cold Drawing" Crystals 14, no. 7: 621.
https://doi.org/10.3390/cryst14070621
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