Effect of precursor phase transition on subsequent martensitic transformation in a Fe-10Cr alloy

作者：Liu, Mingxiang; Li, Zhiming; Luo, Zhiping; Song, Changjiang^*; Zhai, Qijie

来源：Journal of Alloys and Compounds, 2021, 882: 160780.

DOI：10.1016/j.jallcom.2021.160780

• Fe-10Cr
• Martensitic transformation
• Precursor phase transition
• Cooling rate
• Driving force

The critical cooling rate of martensitic transformation cooling from 1300 degrees C is decreased by one order of magnitude, compared to that cooling from 1000 degrees C in a Fe-10Cr alloy. Analysis indicates that precursor delta ->gamma phase transition during cooling from 1300 degrees C significantly decreases the non-chemical driving force of martensitic transformation. The reduction of non-chemical driving force results from the coarsened size of prior austenite grains as well as the decreased frictional energy of interface motion and defect stored energy.

• 单位
  中国空间技术研究院; 上海大学