Micromechanical properties of steel corrosion products in concrete studied by nano-indentation technique
Micromechanical properties of steel corrosion products in concrete studied by nano-indentation technique
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DOI：
10.1016/j.corsci.2019.108304
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发表时间：
2020-02-01
影响因子：
8.3
通讯作者：
Ikushima, Kenji
中科院分区：
文献类型：
--
作者：
Jiang, Baozhen;Doi, Kotaro;Ikushima, Kenji
为了用数值模型分析混凝土的开裂过程，需要对钢筋锈蚀产物的一些力学性能参数进行详细的检测。通过扫描电子显微镜、拉曼光谱和纳米压痕技术对腐蚀产物进行了微观结构和微观力学研究。腐蚀产物经鉴定为针铁矿、纤铁矿、赤霞铁矿、磁赤铁矿和磁铁矿。局部杨氏模量值在54和110 GPa之间变化，而局部纳米硬度值在1.9和8.3 GPa之间变化。典型的杨氏模量和纳米硬度的每个阶段已经确定。
Some mechanical property parameters of steel corrosion products require detailed examination in order to analyze cracking process of concrete with numerical models. Microstructural and micromechanical investigations on corrosion products were performed by combined analysis by scanning electron microscopy, Raman spectroscopy and nano-indentation techniques. The corrosion products were identified to be goethite, lepidocrocite, akaganeite, maghemite and magnetite. The local Young's modulus values varied between 54 and 110 GPa, while the local nanohardness values varied between 1.9 and 8.3 GPa. Typical Young's modulus and nanohardness of each phase have been determined.