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Grain Growth in Nb-Alloyed Stainless Steel of AISI 347 during Heating

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Abstract:

Grain growth kinetics in an AISI 347 stainless steel with Nb content up to 0.7%wt was studied during the isothermal holding in the temperature range of 1100-1270°C for various periods. Abnormal grain growth was observed even in the presence of a large amount of precipitates. The kinetics of normal grain growth was tracked by metallographic measurements and fitted by the classical modeling, which led to two important parameters of activation energy Q and growth exponent n derived. Both of them are larger than the usual values for grain growth in the Nb-microalloyed steels due to the much larger content of Nb in the present steel.

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Periodical:

Materials Science Forum (Volume 753)

Pages:

345-348

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.753.345

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Online since:

March 2013

Authors:

Hai Wen Luo, Han Dong, Ling Feng Chen

Keywords:

Abnormal Grain Growth, Nb Alloyed, Normal Grain Growth, Stainless Steel (SS)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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