High-Strength Low-Cost Nano-Bainitic Steel
High-Strength Low-Cost Nano-Bainitic Steel
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DOI：
10.1007/s11665-020-04771-4
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发表时间：
2020-04-01
影响因子：
2.3
通讯作者：
Soliman, Mohamed
中科院分区：
文献类型：
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作者：
Akram, Mohamad;Palkowski, Heinz;Soliman, Mohamed
Low-cost, fast-transforming carbide-free nano-bainitic steel has been produced with tensile strengths up to 2140 MPa and elongation values of around 10%. An alloying concept of combining low Mn (0.29 wt.%) and moderate Al (~ 1 wt.%) additions enabled full transformation in 10 min to less than 2 h at austempering temperatures ranging from 235 to 310 degrees C. Dilatometric experiments and thermodynamic simulation via ThermoCalc software were employed to design the heat treatment procedure. The resulting structures were investigated using scanning electron microscopy and synchrotron x-ray diffraction. Mechanical characterization was performed via hardness, tensile, and impact testing at room temperature. The strain-aging response for the alloy system was also investigated.
