Resolving the Martensitic Transformation in Q&P Steels In-Situ at Dynamic Strain Rates Using Synchrotron X-ray Diffraction
Resolving the Martensitic Transformation in Q&P Steels In-Situ at Dynamic Strain Rates Using Synchrotron X-ray Diffraction
复制标题
DOI：
10.1007/s11661-022-06788-x
复制
发表时间：
2022-08
期刊：
影响因子：
--
通讯作者：
C. Finfrock;B. Ellyson;C. Becker;J. Copley;K. Fezzaa;N. Parab;Tao Sun;C. Kirk;N. Kedir;Weinong W. Chen;A. Clarke;K. Clarke
中科院分区：
文献类型：
--
作者：
C. Finfrock;B. Ellyson;C. Becker;J. Copley;K. Fezzaa;N. Parab;Tao Sun;C. Kirk;N. Kedir;Weinong W. Chen;A. Clarke;K. Clarke
用高应变率拉伸压杆和In-SituSynchrotron X射线衍射仪研究了两种淬火分配钢的动态变形响应。这使得可以同时测量马氏体相变、马氏体和铁素体上的弹性应变/应力以及块体力学行为。铁素体含量较高的钢表现出较高的塑性和较低的强度，表明铁素体中的位错滑移提高了变形能力。同时，两种钢的马氏体相变动力学相似，尽管铁素体含量较高的钢断裂后在颈部保留了更多的奥氏体。
The dynamic deformation response of two quenching and partitioning (Q&P) steels was investigated using a high strain rate tension pressure bar andin-situsynchrotron radiography and diffraction. This allowed for concurrent measurements of the martensitic transformation, the elastic strains/stresses on the martensite and ferrite, and the bulk mechanical behavior. The steel with the greater fraction of ferrite exhibited greater ductility and lower strength, suggesting that dislocation slip in ferrite enhanced the deformability. Meanwhile, the kinetics of the martensitic transformation appeared similar for both steels, although the steel with a greater ferrite fraction retained more austenite in the neck after fracture.