郭远博,黄兴民,雍薇,张雷,楚珑晟,戴光泽

• 1:西南交通大学材料科学与工程学院
• 2:西南交通大学材料先进技术教育部重点实验室

摘要(Abstract)：

基于粘聚力模型和代表体积单元,采用原位显微观察和扩展有限元模拟,分析了石墨团聚对铁素体球墨铸铁单轴拉伸下的微区应力分布和裂纹演变机理的影响。结果表明,当石墨间距与直径的比值(l/d)高于1.8时,石墨与铁素体基体中裂纹萌生关联较小。随着团聚程度增大(l/d≤1.8),石墨与基体脱粘,裂纹易萌生在团聚石墨间的铁素体内,并沿垂直于拉应力方向扩展。团聚的石墨数量越多,团聚区域越容易产生裂纹。

关键词(KeyWords)： 铁素体球墨铸铁;原位显微观察;细观有限元模拟;失效机理

Abstract:

Keywords:

基金项目(Foundation): 四川省科技支撑计划——高性能铁路轨道用钒钛微合金化新产品研制及应用

作者(Author): 郭远博,黄兴民,雍薇,张雷,楚珑晟,戴光泽

DOI: 10.13289/j.issn.1009-6264.2017-0161

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