评估高强度不钢的拉伸性能,使用小冲击测试
Ran Li1,2,3,4, Wenshu Wei2,3, Rongming Chen3
1Graduate School, China Coal Research Institute, Beijing, China.
Science progress
|September 27, 2024
概括
小孔试验提供了一种非破坏性的方法来评估高强度不钢,准确估计结构完整性的机械性能. 这种技术与传统的拉力试验相对应,有助于材料评估.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 金工业是金工业的一个方面.
背景情况:
- 精确的机械性能测量对于结构应用中的高强度不钢至关重要.
- 标准拉力测试需要破坏性采样,损害结构完整性.
- 小孔试验 (SPT) 为材料表征提供了一种最小侵入性的替代方法.
研究的目的:
- 确定三种高强度不钢的SPT和单轴拉伸试验之间的相关性.
- 为了验证SPT用于估计产量和最终强度.
- 为 SPT 开发有限元分析 (FEA) 模型并确定路德维克功率定律系数.
主要方法:
- 在X17CrNi15-2,15-5PH和PH13-8Mo不钢上进行了SPT.
- 将SPT结果与单轴拉伸试验数据进行比较.
- 利用代FEA来模拟SPT并得出真正的应力-应变性质.
- 使用扫描电子显微镜 (SEM) 描述了骨折机制.
主要成果:
- 与拉伸性测试相比,SPT估计的收益应力显示出1.5的变化因子.
- SPT估计的最终强度与拉伸试验结果有很好的相关性.
- 根据FEA预测的力-偏移曲线与实验SPT数据非常相匹配.
- 陷骨折被确定为通过SEM的占主导地位的失败机制.
结论:
- SPT是一种可行的方法,用于估计高强度不钢的机械性能.
- FEA模拟提高了SPT数据解释的准确性.
- 调查结果支持使用无钢技术来评估正在使用的不钢部件.
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