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飞羽行者

铁杆木虫 (著名写手)

[求助] 关于X射线应力测试方法和Hill模型

读到一篇文章,涉及到X射线应力测试。有这么一段话:
The calculated diffraction elastic constants following Hill’s model used for deriving the stress tensor out of the measured lattice spacings are s1 −1.18 T Pa−1 and 1/2s2 5.58 T Pa−1. It is assumed that the stress normal to the surface is zero, which is a reasonable assumption since the carbide size is larger than the penetration of the X-rays in the surface layer. The resulting stress is the stress present in the matrix.
想跟各位虫友交流几个问题:
1. 文中这个diffraction elastic constants以及Hill’s model 是什么意思?有没有相关的书籍或资料推荐?
2. 有专门的X射线应力测试仪,还有传统的X射线衍射仪,这两者原理是不是都相同?传统的X射线衍射仪可不可以进行X射线应力测试?需要进行哪些计算?
3. 是不是必须要有标样对比,也就是不存在残余应力的式样?
谢谢交流。
文章链接:http://www.sciencedirect.com/sci ... i/S0043164804002662
文章全文见附件。
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