开发和测试粗粒度模型,用于对造奥氏体不钢的超声波模拟
Richard E Jacob1, Matthew S Prowant1, Chris A Hutchinson1
1Pacific Northwest National Laboratory, Richland, WA, USA.
Ultrasonics
|October 8, 2023
概括
创建造奥氏体不钢 (CASS) 的现实模型对于核应用中的超声波测试至关重要. 沃罗诺伊生成的模型的性能与基于实际粒度结构的模型相比,提供了可行的模拟方法.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
- 计算建模 计算建模
背景情况:
- 造奥氏体不钢 (CASS) 的超声波检查具有挑战性,因为粗粒微观结构会导致声场散射和减弱.
- 精确的建模和模拟对于改善超声波测试方法至关重要,包括探头设计和可靠性预测.
研究的目的:
- 展示在CIVA模拟软件中创建现实的和可用的CASS模型的方法.
- 评估基于Voronoi的CASS模型的性能,并将其与从实际的谷物形态学中得出的模型进行对比.
主要方法:
- 从抛光和蚀刻的标本 (均和柱状) 中生成使用实际粒度结构的CASS模型.
- 开发了使用沃罗诺伊地区的替代CASS模型.
- 模拟声场散射,衰减和光束分割与实验室测量进行了比较.
主要成果:
- 基于Voronoi的CASS模型表现出与基于实际谷物形态的模型相等或更好的性能.
- 沃罗诺伊粒结构的模型对模型的变化可以显著影响模拟回声反应 (两个或更多的因素).
结论:
- 基于沃罗诺伊地区的建模为超声波测试中模拟CASS微结构提供了实用和有效的方法.
- 虽然CASS模型可以代表特定的场景,但它们固有的变化性需要谨慎对不同标本的代表性假设.
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