In Situ Stress Analysis under Dynamic State by Using X-ray Diffraction

利用 X 射线衍射进行动态原位应力分析

• 批准号: 06650118
• 负责人: OHYA Shin-ichi
• 金额: $ 1.34万
• 依托单位: MUSASHI INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650118/
• 关键词: X-ray stress analysis; Dynamic measurement; Single exposure technique; Fatigue strength; X線イメージセンサ

The X-ray stress analysis is the method calculates the stress from strain of interplanner spacing, and the value is the actual stress. However, recently most of the X-ray stress analysis apply sin^2psi method which requires plural incident angles to get diffraction angle in each measurement. Therefore it is the real situation that the measurement under dynamic stress circumstances has not been carried out yet. This research is purposed on the realization of the actual stress observation under dynamic condition, it is planned to dissolve the problems by using the combination of "Single Exposure Technique", the one of the method for X-ray stress analysis, and "Position Sensitive Proportional Counter". SET is the method to measure two different diffraction angles in each psi angle from one incident X-ray beam, and to calculate the stress ; which is the most suitable to measure the actual stress under dynamic condition. Provided that it is necessary to count two diffraction profiles at onc … More e ; that causes necessity to develop the attachment and the system to connect two detectors. Originally, we planned to use an X-ray linear image sensor and also we developed the versatile X-ray diffractometer to attach various kinds of detectors and investigated the characteristics of each detector. Finally, it was too difficult to count with two linear image sensors, therefore we applied PSPC connected in series to dissolve the problem.Secondary, for the purpose to materialize the dynamic X-ray stress analysis, we planed X-ray stress measurement under rotational fatigue condition. At first, we developed X-ray stress analyzer utilizes SET method and succeeded to observe the actual stress change following to fatigue repetition increase by using cantilever-type rotational fatigue apparatus with loading gauge. It was made out newly that the actual stress before crack opening decreases with no relation to the stress amplitude, and after crack opening it decreases and breaks because of the stress releasing on the cracked surface. The result of our experience suggests to magnify the new applicable field for the X-ray stress analysis and contributes much to the next research work of material science. Less

X射线应力分析是从平面间距的应变计算应力的方法，其数值为实际应力。然而，目前的X射线应力分析大多采用sin^2psi方法，每次测量都需要多个入射角才能得到衍射角。因此，目前还没有开展动应力环境下的测试，这是真实的情况。本研究旨在实现动态条件下的实际应力观测，拟采用“一次曝光技术”、X射线应力分析方法之一和“位置灵敏正比计数器”相结合的方法来解决这一问题。SET是一种测量一束入射X射线在每个psi角上的两个不同衍射角，并计算应力的方法，它最适合于测量动态条件下的实际应力。假设需要在一次…中计算两个衍射轮廓这就需要开发连接两个探测器的附件和系统。最初，我们计划使用X射线线性图像传感器，并开发了多功能X射线衍射仪来连接各种探测器，并研究了每种探测器的特性。最后，由于两个线阵图像传感器难以计数，因此采用了PSPC串联的方法来解决这一问题。其次，为了实现动态X射线应力分析，我们计划了旋转疲劳条件下的X射线应力测量。首先，我们利用SET方法研制了X射线应力分析仪，并利用带载荷计的悬臂式旋转疲劳装置，成功地观测到了疲劳重复次数增加后的实际应力变化。新发现，裂纹张开前的实际应力减小，与应力幅值无关，裂纹张开后，由于裂纹面的应力释放，实际应力减小并断裂。研究结果为X射线应力分析开辟了新的应用领域，为材料科学下一步的研究工作做出了贡献。较少

项目成果

西畑浩憲: "回転曲げ疲労試験中のX線応力測定" 日本非破壊検査協会 応力・ひずみ測定シンポジウム講演論文集. 27. 37-42 (1996)

Hironori Nishihata：“旋转弯曲疲劳测试期间的 X 射线应力测量”日本无损检测协会应力/应变测量研讨会论文集 27. 37-42 (1996)。

S.Ohya, S.Ohata and S.Maeno: "The Development of X-ray Stress Analyzer for Multiple Use and It's Application" Proceedings of Symposium on X-ray studies on Mechanical Behavior of Materials. 31. 10-13 (1995)

S.Ohya、S.Ohata 和 S.Maeno：“多用途 X 射线应力分析仪的开发及其应用”材料机械行为 X 射线研究研讨会论文集。

大谷眞一: "汎用X線応力測定装置の開発とその測定例" 日本材料学会 X線材料強度に関するシンポジウム講演論文集. 31. 10-13 (1995)

Shinichi Otani：“通用 X 射线应力测量装置的开发及其测量实例”X 射线材料强度研讨会论文集，材料科学学会，日本，31. 10-13 (1995)。

大谷眞一: "汎用X線応用測定装置の開発とその測定例" 日本材料学会 X線材料強度に関するシンポジウム講演論文集. 31. 10-13 (1995)

Shinichi Otani：“通用 X 射线应用测量设备的开发及其测量实例”X 射线材料强度研讨会论文集，日本材料科学学会，31. 10-13 (1995)。

S.Ohya, S.Hoshino, Y.Yoshioka and H.Nishihata: "X-ray Stress Analysis during Fatigue Process" Proceedings of Symposium on X-ray studies on Mechanical Behavior of Materials. 31. 141-145 (1995)

S.Ohya、S.Hoshino、Y.Yoshioka 和 H.Nishihata：“疲劳过程中的 X 射线应力分析”材料机械行为 X 射线研究研讨会论文集。