Amorphous Fe1-xCx coatings as carbon reservoirs for diffusion strengthening of steel sheets

作者：Scott C P^*; Sinclair C; Weck A

来源：Scripta Materialia, 2011, 65(9): 763-766.

DOI：10.1016/j.scriptamat.2011.07.023

• PVD
• EELS
• IF steels
• Amorphous Fe-C
• Interstitial diffusion

In situ transmission electron microscopy-electron energy loss spectroscopy heating experiments were carried out to study the composition, structure and thermal stability of physical-vapour-deposited amorphous-Fe1-x-C-x films. Compositionally graded interstitial-free steel sheets were then produced by diffusion annealing specimens coated with thin layers of amorphous-Fe0.4C0.6. After annealing at 425 degrees C, tensile samples exhibited a + 86 MPa increase in yield strength and + 41 MPa in ultimate tensile strength with no significant reduction in elongation compared to the unannealed condition. Furthermore, specimens annealed at 425 degrees C did not show any yield point elongation.

• 出版日期2011-11
• 单位AREVA NP