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Proposal of Simplified Modified Williamson-Hall Equation

机译:简化的改进的Williamson-Hall方程的建议

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Williamson-Hall (WH) plots are characterized by irregular arrangement of data due to the elastic anisotropy in each {hkl} plane. In order to correct the effect of elastic anisotropy, Ungár developed a unique methodology using the contrast factor C , so called the modified Williamson-Hall (mWH) method. When X-ray with the wave length λ was used for diffraction analysis and diffraction angle θ and integral breadth β was obtained in each diffraction peak, the following mWH equation is constructed as functions of the parameter K (=2sinθ /λ ) and Δ K (=β cosθ /λ ).Here, the parameter α is dependent on the crystallite size. The parameter φ and O are constants but the O -value is much smaller than the φ -value. In the mWH plots in 60% cold rolled ferrite (Fe-0.0056%C), ultra low carbon martensite (Fe-18%Ni) and 20% cold rolled austenite (SUS316L), it was confirmed that the value of OK ~(2)C is negligibly small. As a result, the following simplified equation is applicable for the analysis by mWH method.
机译:Williamson-Hall(WH)图的特征是由于每个{hkl}平面中的弹性各向异性而导致数据的不规则排列。为了校正弹性各向异性的影响,Ungár开发了一种独特的方法,即使用对比度因子C,即改进的Williamson-Hall(mWH)方法。当使用波长为λ的X射线进行衍射分析并且在每个衍射峰中获得衍射角θ和积分宽度β时,以下mWH方程将作为参数< i> K(= 2sin θ/ λ)和Δ K(= βcos θ/ λ)。在这里,参数 α取决于微晶尺寸。参数φ和 O是常数,但是 O值比φ值小得多。在60%冷轧铁素体(Fe-0.0056%C),超低碳马氏体(Fe-18%Ni)和20%冷轧奥氏体(SUS316L)的mWH图中,证实了 OK的值〜(2)C可以忽略不计。结果,以下简化方程适用于通过mWH方法进行的分析。

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