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首页> 外文会议>AIST steel properties amp; applications conference proceedings combined with MSamp;T' 10 materials science and technology 2010 >Mechanical Properties Dependence on Microstructures of Hot Rolled 3rd Generation Advanced High-strength Steels
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Mechanical Properties Dependence on Microstructures of Hot Rolled 3rd Generation Advanced High-strength Steels

机译：机械性能取决于第三代热轧高强度高强钢的组织

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摘要

Three lightweight steels with densities between 7.3 and 7.5 g/cm~3 met property goals for third generation advanced high-strength steels. Plates were cast, homogenized, and hot rolled to produce a prior austenite grain size of 50 μm. Hot rolled microstructures consisted of ferrite stringers, bainitic ferrite, and retained austenite. First principles calculations were used to investigate defect structures and phase stability. The compositions of the alloys were formulated using phase equilibrium modeling and stacking fault energy calculations. The composition in weight percentage of the alloys ranged from 0.1 to 0.2% C, 13.5 to 13.9% Mn, 3.4 to 4.5% Al, and 1.3 to 2.1% Si. This range of compositions produced alloys with calculated stacking fault energies between 26 mJ/m2 and 35 mJ/m2. The alloys exhibited transformation induced plasticity during tensile testing with ultimate tensile strengths between 865 and 974 MPa with necking strains up to 39%.
机译：三种密度在7.3至7.5 g / cm〜3之间的轻质钢达到了第三代高级高强度钢的性能目标。将板铸造，均质化并热轧以产生先前的奥氏体晶粒尺寸为50μm。热轧组织由铁素体纵梁，贝氏体铁素体和残余奥氏体组成。第一原理计算用于研究缺陷结构和相稳定性。使用相平衡模型和堆垛层错能量计算来配制合金的成分。合金的重量百分比组成为0.1至0.2％C，13.5至13.9％Mn，3.4至4.5％Al和1.3至2.1％Si。在此范围的成分下，合金的堆垛层错能量在26 mJ / m2至35 mJ / m2之间。合金在拉伸试验中表现出相变诱导塑性，极限拉伸强度在865和974 MPa之间，颈缩应变高达39％。

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