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Improvement of High-Temperature Mechanical Properties of Low-Carbon RAFM Steel by MX Precipitates

Journal Article


Abstract


  • To investigate the influence of tantalum content on high-temperature mechanical properties of low-carbon reduced activation ferritic/martensitic (RAFM) steels, RAFM steels containing different tantalum contents (0 and 0.073%) were fabricated, and the tensile tests at room temperature and high temperature were performed, as well as the creep tests were conducted at 550����C with the applied stress of 180 and 220��MPa. It was found that 0.073% tantalum addition results in the increase in amount of stable carbonitrides (MX), and the creep rupture time of the steel under 180��MPa is obviously increased. In addition, the increase in MX caused by tantalum addition also leads to the improvement of high-temperature tensile strength. The improvement of high-temperature mechanical properties of RAFM steels is primarily related to the evolution of precipitates.

Publication Date


  • 2018

Citation


  • Chen, J., Liu, Y., Xiao, Y., Liu, Y., Liu, C., & Li, H. (2018). Improvement of High-Temperature Mechanical Properties of Low-Carbon RAFM Steel by MX Precipitates. Acta Metallurgica Sinica (English Letters), 31(7), 706-712. doi:10.1007/s40195-018-0703-y

Scopus Eid


  • 2-s2.0-85047448325

Start Page


  • 706

End Page


  • 712

Volume


  • 31

Issue


  • 7

Place Of Publication


Abstract


  • To investigate the influence of tantalum content on high-temperature mechanical properties of low-carbon reduced activation ferritic/martensitic (RAFM) steels, RAFM steels containing different tantalum contents (0 and 0.073%) were fabricated, and the tensile tests at room temperature and high temperature were performed, as well as the creep tests were conducted at 550����C with the applied stress of 180 and 220��MPa. It was found that 0.073% tantalum addition results in the increase in amount of stable carbonitrides (MX), and the creep rupture time of the steel under 180��MPa is obviously increased. In addition, the increase in MX caused by tantalum addition also leads to the improvement of high-temperature tensile strength. The improvement of high-temperature mechanical properties of RAFM steels is primarily related to the evolution of precipitates.

Publication Date


  • 2018

Citation


  • Chen, J., Liu, Y., Xiao, Y., Liu, Y., Liu, C., & Li, H. (2018). Improvement of High-Temperature Mechanical Properties of Low-Carbon RAFM Steel by MX Precipitates. Acta Metallurgica Sinica (English Letters), 31(7), 706-712. doi:10.1007/s40195-018-0703-y

Scopus Eid


  • 2-s2.0-85047448325

Start Page


  • 706

End Page


  • 712

Volume


  • 31

Issue


  • 7

Place Of Publication