Effect of Thermo-Mechanical Processing on Precipitate Formation in Next Generation HSLA Steel

【摘要】：正Development of advanced high strength steels(AHSS) using a conventional rolling setup is one of the biggest challenges to steel industry.It has been found that fine precipitation in a soft matrix,formed after hot rolling,can markedly improve the mechanical properties.In this work,three dimensional atom probe tomography(3D-APT) has been used to study the formation of precipitates in thermomechanically simulated steel.3D-APT data reveals co-existence of numerous nano clusters with precipitates.Also,quantitative analysis of the nano clusters and precipitates shows clusters are as small as 1nm in size.Precipitates are found to be disc shaped with the composition of equilibrium precipitates (TiMo)C.Thus,3D-APT is seen as an ideal technique to complement TEM to understand the nanoscale features in thermomechanically processed steel for further improvements in the mechanical properties of AHSS.

【作者单位】：Centre for Material and Fibre Innovation,Deakin University,Geelong,Vic 3217,Australia Australian Key Centre for Microscopy and Microanalysis,University of Sydney,NSW,Australia
【基金】：supported by grants through the Australian Research Council including an ARC Federation Fellowship(P.D.H.)
【分类号】：TG161
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