In-situ observations on the suppression of phase separation in duplex stainless steel by applying an external magnetic field

• In-situ small-angle neutron scattering (SANS) experiments, with and without an applied magnetic field of 1.5 T, were performed for two duplex stainless steels: 22Cr-5Ni and 25Cr-7Ni (wt.%) during isothermal heat treatment at 450 °C. The kinetics of phase separation was suppressed by the external magnetic field in both steels, however, the suppression was much more pronounced in 25Cr-7Ni where phase separation was nearly eliminated. The different magnetic energy contribution from the external field in each alloy explains the different behaviour of the alloys. The findings could have large technical implications for mitigation of low-temperature embrittlement in Fe-Cr-Ni based alloys.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)

Nyckelord

In-situ SANS; duplex stainless steel; phase separation; spinodal decomposition; magnetic field; embrittlement.

Publikations- och innehållstyp

vet (ämneskategori)

ovr (ämneskategori)