渗碳体
材料科学
贝氏体
原子探针
透射电子显微镜
降水
冶金
沉淀硬化
针状铁素体
电子背散射衍射
铁氧体(磁铁)
奥氏体
合金
晶界
结晶学
复合材料
微观结构
纳米技术
物理
化学
气象学
作者
Chen Gu,Colin Scott,Fateh Fazeli,Xiang Wang,Nabil Bassim,Hatem S. Zurob
标识
DOI:10.1016/j.jmrt.2023.11.081
摘要
Precipitation in a high-strength low-alloy steel containing V and Nb additions during coiling at 500 °C, was investigated by advanced characterization techniques including electron backscattered diffraction, focused ion beam, transmission electron microscopy and atom probe tomography. During coiling, nano precipitates were preferentially formed around dislocations and grain/sub-grain boundaries in the high Kernel Average Misorientation (KAM) areas associated with bainite. Precipitates were frequently observed around cementite in the low KAM areas with cementite which were identified as granular bainite. Interphase clusters were found in the low KAM areas associated with ferrite. The site-specific methods reveal the co-existence of different kinds of precipitates. Analysis of the results indicates that the precipitation of microalloy particles close to cementite could lower the precipitation hardening contribution that could be achieved through microalloying.
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