使用超声波最小反射测量方法,对射击打磨的Inconel中的残余应力进行非破坏性评估
Yeong-Won Choi1, Taek-Gyu Lee2, Yun-Taek Yeom3
1School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
Materials (Basel, Switzerland)
|July 29, 2023
概括
超声波最小反射度测量为INCONEL 718中的残余应力评估提供了一种安全和成本效益的方法. 这种技术提供了精确的应力深度概况,与传统的X射线衍射方法相比.
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
- 机械工程 机械工程
背景情况:
- 基于的超级合金,如INCONEL,由于其高强度和抗性,在航空航天和核应用中至关重要.
- 射击削会诱导残余应力来增强材料特性,需要精确的测量技术.
- 传统的方法,如X射线衍射 (XRD) 的残余应力测量是准确的,但破坏性,并带来安全风险.
研究的目的:
- 为了评估超声波最小反射度测量的有效性,以评估INCONEL 718中的残余应力.
- 开发一个估计方程,用超声波数据预测残余应力分布与深度.
- 为了比较超声波方法的准确性与已建立的XRD技术.
主要方法:
- 使用雷利波来探测INCONEL 718标本的超声波最小反射度测量.
- 开发并解决了一个优化问题,使用指数函数来建立剩余应力深度配置方程.
- 通过将其结果与通过X射线衍射 (XRD) 获得的残余应力测量结果进行比较,验证了超声波方法.
主要成果:
- 超声波最小反射度测量成功评估了INCONEL 718中的残余应力.
- 以指数函数为基础的方程得出以估计剩余应力分布与深度.
- 超声波方法显示了与破坏性XRD技术相似的结果,验证了其有效性.
结论:
- 超声波最小反射率测量是一种可行的,非破坏性的替代方案,用于INCONEL 718中的残余应力评估.
- 开发的估计方程允许以深度为依赖的残余应力分析.
- 与传统方法相比,这种超声波方法提供了更安全,更快,更具成本效益的解决方案.
相关概念视频
01:26Residual Stresses
244
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
244
01:10Residual Stresses in Circular Shafts
196
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
196
01:18Residual Stresses in Bending
207
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
207
01:12Non-destructive Tests for Concrete Strength
144
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
144
01:25Yield Criteria for Ductile Materials under Plane Stress
186
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
The Maximum Shearing Stress Criterion, also known as...
186