Effect of gadolinium and boron addition on the texture development and magnetic properties of 23Cr–10NiCu duplex stainless steels

Abstract

The effect of gadolinium and boron on the texture development and magnetic properties of the texture controlled 23Cr–10NiCu duplex stainless steels were studied to develop a high performance neutron and electromagnetic shielding material. The 23Cr–10NiCu base alloy is composed of 60% of austenite and 40% of ferrite, whereas, the 23Cr–10NiCu-0.5Gd-0.8B modified alloy is composed of 66% of austenite, 27% of ferrite and 7% of CrFeB intermetallic compounds. The gadolinium and boron addition to the 23Cr–10NiCu base alloy increased mechanical properties. Microstructure observation showed that the small addition of 0.5 wt% gadolinium and 0.8 wt% boron to the alloy retarded to form texture at the same hot rolling conditions, and improved the maximum magnetism, residual magnetism and coercive force about 3%, 122% and 120%, respectively.

Keywords

• Duplex stainless steels
• Gadolinium
• Boron
• Texture
• Magnetic property