In the present work, the quantitative contributions of severe plastic deformation (SPD) through machining on the microcrystalline features and fatigue life of SPD processed Nimonic 263 have been investigated. X-ray diffraction line profile analysis (XRDLPA) has been executed to compute the likely makeover of microcrystalline characteristics such as crystallite size, lattice strain and dislocation density using full width at half maximum of diffraction peak, and additionally, the influences of these characteristics on fatigue life of the SPD processed samples have been analyzed. To deconvolute these characteristics, Williamson–Hall methods such as uniform deformation model, uniform energy density deformation models (UEDM) and uniform stress deformation model (USDM) are employed. The XRDLPA of machined samples has confirmed a significant broadening of peaks, due to lattice distortions and grain refinement during machining, and a plot of root mean square (RMS) of lattice strain (ε_rms) versus lattice strain (ε) has resulted in no inconsistency related to the lattice plane and crystallographic direction. Further, other related physical parameters such as uniform stress, Young’s modulus and energy density are also evaluated using UEDM and USDM models. As a result of the study, it is clear that the substantial influence comes from tool nomenclature over machining parameters.

在目前的工作中，已经研究了通过机械加工对SPD加工的Nimonic 263的微晶特征和疲劳寿命的严重塑性变形（SPD）的定量贡献。已执行X射线衍射线轮廓分析（XRDLPA），以使用衍射峰半峰全宽计算微晶特性（如微晶尺寸，晶格应变和位错密度）的可能组成，此外，这些特性对经SPD处理的样品的疲劳寿命已得到分析。为了对这些特征进行反卷积，采用了Williamson-Hall方法，例如均匀变形模型，均匀能量密度变形模型（UEDM）和均匀应力变形模型（USDM）。ε _RMS）与晶格应变（ε）导致没有不一致有关的晶格面和结晶方向。此外，还使用UEDM和USDM模型评估了其他相关物理参数，例如均匀应力，杨氏模量和能量密度。研究结果表明，很明显的影响是刀具名称对加工参数的影响。