High-Energy X-Ray Synchrotron Radiation Analysis of Residual-Stress Distribution of Shot-Peened Steel
High-Energy X-Ray Synchrotron Radiation Analysis of Residual-Stress Distribution of Shot-Peened Steel
复制标题
喷丸钢残余应力分布的高能X射线同步辐射分析
DOI：
10.4028/www.scientific.net/msf.404-407.341
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Arai
中科院分区：
文献类型：
--
作者：
Keisuke Tanaka;Y. Akiniwa;Kenji Suzuki;E. Yanase;K. Nishio;Y. Kusumi;K. Arai
利用同步辐射源SPring-8发射的高能x射线，测定了碳钢喷丸表面下的残余应力分布。利用30、60和72 keV三个能级的单色x射线束，用斜向法（ψ衍射仪）测定了应力值。应力值由2θ与sin2ψ在sin2ψ = 0 ~ 0.5范围内的线性近似斜率估计。估计的应力与去除表层后用Cr-Ka辐射重复x射线测量得到的残余应力分布一致。利用sin 2 ψ图的非线性可以估计残余应力的分布。提出了一种估算分布残余应力应力值的新方法。该方法采用侧倾角法和等倾角法（ω衍射仪）相结合的方法来保持穿透深度恒定。该方法成功地确定了给定侵彻深度下的应力值。
A high-energy X-ray beam from a synchrotron radiation source, SPring-8, was used to determine the residual stress distribution below the shot-peened surface of a carbon steel plate. By using the monochromatic X-ray beam with three energy levels of 30, 60 and 72 keV, the stress values were determined by the sin 2 ψ method with the side-inclination method (ψ diffractometer). The stress value was estimated from the slope of the linear approximation of the relation between 2θ and sin 2 ψ in the range of sin 2 ψ = 0 to 0.5. The estimated stress agreed with the distribution of the residual stress measured by removing the surface layer and repeating the X-ray measurement with Cr-Ka radiation. The nonlinearity of the sin 2 ψ diagram can be used to estimate the distribution of the residual stress. A new method was proposed to estimate the stress value of the distributed residual stress. The new method was a combination of the side-inclination method and the iso-inclination method (ω diffractometer) to maintain the penetration depth constant. The stress value at a given penetration depth was successfully determined by the new method.