Dislocation-Precipitate Interaction and Its Effect on Thermostability of Bainite in a Nb-Bearing Steel

Abstract:

After bainitic transformation, the dislocations formed in deformed austenite remained to be pinned by the precipitates so that thermostability of the bainitic ferrite was improved. Coarsening of the precipitates accompanied by their distribution density change occurred during reheating. After long reheating, further precipitates nucleated in bainite. Dislocations inside laths getting rid of pinning of precipitates and their polygonization play the precursor to the evolution of microstructures, in which lath boundaries disappeared gradually.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 125-128
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.125
• Online since: January 2005
• Authors: Shan Wu Yang, Hui Bin Wu, S.Q. Yuan, Cheng Jia Shang, Xue Min Wang, Xin Lai He
• Keywords: Dislocation, Pinning, Strain Induced Precipitate, Thermostability

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