The residual pressure surrounding quasistatic and dynamic Vickers indentations in boron carbide was quantitatively mapped in 3 dimensions using Raman spectroscopy. These maps were compared against similar maps of amorphization intensity and optical micrographs of deformed regions to determine the roles of amorphization and damage upon indentation‐induced residual stress. Stress relaxation was observed near radial cracks, spalled regions, and graphitic inclusions. A positive correlation was found between high levels of residual stress and the number of amorphized sites detected. Finite element simulations were conducted to model the indentation‐induced residual stress fields in the absence of amorphization and cracking. The simulations underpredicted the average residual pressure observed through Raman spectroscopy, implying that amorphization contributes to increased pressure in the material. This pressure is interpreted as potential evidence of volumetric expansion of the amorphized material which is less ordered and hence exerts compressive forces on the surrounding crystalline matrix.

中文翻译：

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碳化硼中非晶化引起的体积变化和残余应力

使用拉曼光谱法将碳化硼中准静态和动态维氏压痕周围的残余压力量化为3维。将这些图与类似的非晶化强度图和变形区域的光学显微图进行比较，以确定在压痕引起的残余应力下非晶化和损伤的作用。在径向裂纹，剥落区域和石墨夹杂物附近观察到应力松弛。发现高水平的残余应力与检测到的非晶化位点数量之间存在正相关关系。进行了有限元模拟，以在没有非晶化和裂纹的情况下对压痕引起的残余应力场进行建模。该模拟低估了通过拉曼光谱法观察到的平均残余压力，暗示非晶化有助于增加材料中的压力。该压力被解释为非晶材料体积膨胀的潜在证据，非晶材料的体积膨胀不太有序，因此在周围的晶体基质上施加了压缩力。