Atomistic interaction between silicon and manganese in pearlitic steel: Combined atom probe tomography and first-principle calculations

作者：Tu Yiyou^*; Mao Zugang; Zhang Qun; Zhou Xuefeng; Fang Feng; Jiang Jianqing

来源：Materials Letters, 2014, 134: 84-86.

DOI：10.1016/j.matlet.2014.07.057

• Pearlitic steel
• Partitioning
• Atom probe
• Simulation and modeling

Atom-probe tomography (APT) and first-principle calculations are employed to investigate the role of Si on the partitioning behavior of Mn in pearlitic steel. Mn is experimentally observed to partition preferentially to cementite, while Si prefers to bcc alpha-Fe by APT. The partitioning ratio of Mn in SWRS87BM steel (i.e., 8.17 +/- 1.57) is more pronounced than that in SWRS82B steel (i.e., 3.66 +/- 0.44), which is attributed to the higher content of Si in the former than in the latter. First-principle calculations illustrate that Si atoms, which strongly partition to bcc alpha-Fe phase, repulse Mn atoms into cementite phase and increase the Mn partitioning ratio.

• 出版日期2014-11-1
• 单位东南大学; 西北大学