Relationship between microstructure and yield strength for plain carbon steel with ultrafine or fine (ferrite+cementite) structure
Relationship between microstructure and yield strength for plain carbon steel with ultrafine or fine (ferrite+cementite) structure
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DOI：
10.1016/j.msea.2014.08.050
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发表时间：
2014-11
期刊：
影响因子：
6.4
通讯作者：
Chengsi Zheng;Longfei Li;Wangyue Yang;Zu-qing Sun
中科院分区：
文献类型：
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作者：
Chengsi Zheng;Longfei Li;Wangyue Yang;Zu-qing Sun
通过热机械加工工艺制备了具有不同超细晶或细晶铁素体基体（α）+铁素体颗粒（θ）组织的普碳钢。利用扫描电镜分析了初始组织参数，利用透射电镜分析了位错形貌。建立了普碳钢超细或细（α+θ）组织的显微组织参数与屈服强度之间的关系。结果表明，具有超细或细（α+θ）组织的普碳钢的屈服强度与铁素体基体的晶粒尺寸、铁素体颗粒的尺寸、体积分数和位置有直接关系，且铁素体颗粒对屈服强度的提高随碳含量的增加或颗粒的细化而增强。
Plain carbon steels with different ultrafine or fine-grained ferrite matrix (α)+cementite particle (θ) structures were formed through thermo-mechanical processes. Scanning electron microscopy was used to analyze the initial microstructural parameters, and the dislocation morphology was analyzed by transmission electron microscopy. A relationship between the microstructural parameters and yield strength was established for plain carbon steel with an ultrafine or fine (α+θ) structure. The results indicated that the yield strength of plain carbon steel with an ultrafine or fine (α+θ) structure had a direct relationship with the grain size of the ferrite matrix and the size, volume fraction and location of cementite particles, and the enhancement in yield strength caused by the cementite particles was improved with the increase in carbon content or the particle-refinement.