辐射柔性退化的定量评估,使用缩技术与数值实验相结合
Takashi Wakui1, Shigeru Saito1, Masatoshi Futakawa1
1J-PARC Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan.
Materials (Basel, Switzerland)
|December 17, 2024
概括
这项研究引入了一种快速方法,使用缩试验来评估被辐射材料的柔性性质. 这些发现使材料完整性和总延长的准确预测成为可能,这对于结构安全至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 核工程 核工程是指核工程.
背景情况:
- 柔性特性对于评估辐射材料的结构完整性至关重要.
- 在辐射环境中进行传统的拉伸性测试是复杂的,耗时的.
- 入试验为评估材料柔性提供了一个更快的替代方案.
研究的目的:
- 开发和验证一种快速的方法,用缩试验来确定被辐射材料的柔性性质.
- 建立一个可靠的方法来预测总延长和材料完整性.
- 为了比较数值模拟与实验拉伸试验的有效性.
主要方法:
- 利用卡尔曼波器的反向分析,从缩进测试数据中识别Swift型构成方程的常数.
- 使用已识别的材料常数进行了数值拉伸实验,以生成应力-拉伸曲线.
- 开发了评估总延长的两种方法,一种是基于已建立的拉力测试关系,另一种是使用延展性故障标准.
主要成果:
- 通过数值模拟成功复制了缩测试结果.
- 确定了关键的材料常量:产应力 (200-1000 MPa),加工硬化系数 (1100-1500 MPa) 和指数 (0.5-0.7).
- 评估的离子辐射材料的最低总延长率为10%,与传统的拉伸性测试相一致.
结论:
- 穿孔试验与数值分析相结合,提供了一种可行的和有效的方法来评估被辐射材料的柔性性质.
- 提出的方法准确地预测材料的行为和总延伸,有助于结构完整性的评估.
- 这些发现表明,在保持可靠的材料属性评估的同时,减少测试时间和资源的潜力.
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