Effects of Rare Earth on the Inclusions and Mechanical Properties of Austenitic Stainless Steel

Abstract:

The effects of rare earth metals on the inclusions and the mechanical properties of 21Cr11Ni austenitic steel were studied by scanning electron microscope (SEM) and energy spectrum analysis. The results show that the morphologies and sizes of inclusions in 21Cr11Ni stainless steel are changed, and rare earth played a very good role of modifying inclusions. The fracture mode of 21Cr11Ni stainless steel is typical cleavage fracture, but quasi-cleavage and dimple fracture after adding RE into the steel. The transverse impact toughness of 21Cr11Ni stainless steel is improved obviously by RE. In comparison with 21Cr11Ni stainless steel without RE, the transverse impact toughness of 21Cr11Ni stainless steel with RE is increased 25.33% at-40°C, and the room temperature strength are improved, the elongation and reduction of area have been improved 9.18%, 12.71% respectively.

• Periodical: Advanced Materials Research (Volume 711)
• Pages: 99-102
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.711.99
• Online since: June 2013
• Authors: Xiao Liu, Jing Long Liang
• Keywords: Austenitic Stainless Steel, Inclusion, Mechanical Property, Rare Earth (RE)

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