The 9Cr-1Mo-0.1C steel was solutionzed (1323 K for 1hr) and step cooled (at 40 K/hr between M_s and M_f) to effect martensitic transformation at slower rates, and then subsequently tempered (1023 K for 2 hr). The microtexture of the tempered martensite structure was evaluated using SEM-Electron Back Scattered Diffraction (EBSD) technique, and the crystal orientation data of ferrite crystallites formed within a single prior-y grain were analyzed in detail. The Kurdjumov-Sachs (K-S) orientation relationship (111)_γ // (011) α' [-101]γ // [-1-11] α' is commonly obeyed in low carbon steels, and a restitution methodology was used to back calculate the orientation of parent y grain assuming the K-S relationship. The austenite was identified as the common solution of the data set, and its mean orientation has been calculated. The mean deviation from the K-S was calculated to be 3.75°.
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机译：将9Cr-1Mo-0.1C钢固溶（1323 K，持续1小时）并逐步冷却（在M_s和M_f之间以40 K / hr的速度）以较低的速率进行马氏体相变，然后回火（1023 K，持续2 hr）。使用SEM-电子背散射衍射（EBSD）技术评估了回火马氏体组织的微观组织，并详细分析了单个先验晶粒内形成的铁素体微晶的晶体取向数据。在低碳钢中通常遵循Kurdjumov-Sachs（KS）取向关系（111）_γ//（011）α'[-101]γ// [-1-11]α'假设KS关系，则反算y母粒的取向。奥氏体被确定为数据集的通用解，并且已经计算出其平均取向。与K-S的平均偏差经计算为3.75°。
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