On the chemistry and stability of complex carbides and nitrides in microalloyed steels

• Light optical and elctron microscopy, and quantitative (STEM-EDX) micro-analysis are employed to characterize a number of different Ti-micro-alloyed steels, containing various alloying additions including high and low levels of nitrogen, and a Nb-steel is used as a comparison. Weld thermal cycling treatments substantially change particle compositions compared to the as-received (rolled or normalized) conditions, and even the energy input of the welding process is of importance in this respect. As a general rule, TiN-containing steels provide for good grain growth control during weld cycling, although the presence of additional alloying elements in the particles may affect particle stability in a complicated way. It is shown that equilibrium thermodynamics can be used to make reasonable predictions of particle compositions provided the prior heat treatment is such to allow the particles to remain near their equilibrium condition

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Annan materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Other Materials Engineering (hsv//eng)

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Engineering Materials

Materialteknik

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