TY - JOUR
T1 - Microstructure Evolution and Tensile Properties of Cold-Rolled and Annealed Fe-30Mn-0.14C-7Cr-0.26Ni Steel
AU - Chen, Xiaoman
AU - Zhang, Jiaxin
AU - Xiong, Jianchao
AU - Wang, Yuhui
AU - Zhang, Yubin
AU - Wang, Tiansheng
AU - Peng, Yan
PY - 2021
Y1 - 2021
N2 - The carbide precipitation, microstructure evolution, and tensile properties of Fe-30Mn-0.14C-7Cr-0.26Ni (in wt pct) steel after cold rolling to 95 pct reduction followed by annealing at temperatures ranging from 600 °C to 900 °C for 1 hour were investigated. The results show that, when the annealing temperature is increased from 600 °C to 900 °C, the grain size increases from 0.65 ± 0.30 to 5.75 ± 3.87 μm. When the annealing temperature is 600 °C, Cr23C6 carbides begin to precipitate. When the annealing temperature is increased from 600 °C to 800 °C, the average size of carbides increases from 39 to 69 nm. When the annealing temperature is increased to 900 °C, no carbides are produced due to the increased solubility of C in the austenite matrix. Ultrafine grains (~ 0.8 ± 0.58 μm) with a large amount of nanoscale carbides (~ 53 ± 21.8 nm) were obtained after annealing at 700 °C, resulting in a good combination of yield strength (679 MPa) and total elongation (38.4 pct). The fraction of deformation twins within the samples under different tensile strains was calculated, and it was revealed that grain refinement can seriously inhibit the generation of deformation twins. In addition, it has been found that grain refinement strengthening, precipitation strengthening, and dislocation strengthening have significant effects on yield strength, while the effects of solution strengthening and lattice friction are relatively weaker.
AB - The carbide precipitation, microstructure evolution, and tensile properties of Fe-30Mn-0.14C-7Cr-0.26Ni (in wt pct) steel after cold rolling to 95 pct reduction followed by annealing at temperatures ranging from 600 °C to 900 °C for 1 hour were investigated. The results show that, when the annealing temperature is increased from 600 °C to 900 °C, the grain size increases from 0.65 ± 0.30 to 5.75 ± 3.87 μm. When the annealing temperature is 600 °C, Cr23C6 carbides begin to precipitate. When the annealing temperature is increased from 600 °C to 800 °C, the average size of carbides increases from 39 to 69 nm. When the annealing temperature is increased to 900 °C, no carbides are produced due to the increased solubility of C in the austenite matrix. Ultrafine grains (~ 0.8 ± 0.58 μm) with a large amount of nanoscale carbides (~ 53 ± 21.8 nm) were obtained after annealing at 700 °C, resulting in a good combination of yield strength (679 MPa) and total elongation (38.4 pct). The fraction of deformation twins within the samples under different tensile strains was calculated, and it was revealed that grain refinement can seriously inhibit the generation of deformation twins. In addition, it has been found that grain refinement strengthening, precipitation strengthening, and dislocation strengthening have significant effects on yield strength, while the effects of solution strengthening and lattice friction are relatively weaker.
U2 - 10.1007/s11661-021-06345-y
DO - 10.1007/s11661-021-06345-y
M3 - Journal article
SN - 1073-5623
VL - 52
SP - 3839
EP - 3848
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
ER -