A Study on Crystal Grain Projection Method by SR and Application to Al Alloy

1.实验对KEK的实验方案被批准到1998.10。测量是在KEK光子工厂的光束线BL-3A上进行的，测量方法是在晶体颗粒投影方法下进行的。对O-10%镁含量的热轧铝合金板材进行二次加热，冷轧至0.5 mm厚度。采用切削法制作了冷轧试件，并对其晶粒长大过程进行了高温测量。在实验室加热冷轧试件后，进行了室温测量，揭示了镁对一次再结晶的影响。数据分析方法(1)配备个人计算机(Gateway，G6-266)、数据处理软件(Rigaku，CONTROLWIN)和图像分析软件(Media Cybernetics，Image-Pro Plus)，使BMP类型的图像数据从数据处理软件传输到图像分析软件成为可能。(2)使用15亩m标准粉末样品，正确计数颗粒数量，半定量估计颗粒尺寸。镁加入量对晶粒生长过程的影响分析(1)在镁加入量为6~7%的情况下，主要取向为旋转立方。而在-9%时，观察到了与立方取向相关的投影图。(2)高温下观察到了纯Al的晶粒长大过程。在同一时间内，一些颗粒消失或变得非常小，否则许多颗粒保持其大小。在高温下，动态观察到X射线积分强度随晶粒度的变化。在此基础上，研究了不同晶粒度的晶粒的应变和由不同晶粒度的晶粒组成的极图。

1. ExperimentsThe experimental proposal to KEK was approved until 1998.10. Measurements were made at the beamline BL-3A at the Photon Factory, KEK under crystal grain projection method setup. Hot-rolled aluminum alloy sheets with O-10% Mg were reheated and cold- rolled to 0.5 mm in thickness. Cold-rolled specimens were made by cutting and the high temperature measurement of grain growth process was carried out. After heating cold-rolled specimens in laboratory, room temperature measurement was made to reveal the effect of Mg on primary recrystallization.2. Data Analysis method(1) A personal computer (Gateway, G6-266), a data processing software (Rigaku, CONTROLWIN) and an image analysis software (Media Cybernetics, Image-Pro Plus) were equipped and BMP type image data transfer from the data processing software to the image analysis software has become feasible.(2) The number of grains was counted correctly and the size of grains were estimated semi quantitatively by using 15 mu m standard powder specimen.3. Analysis of the effect of addition of Mg and grain growth process(1) In the case of additioning of 6-7% Mg, ND-rotated cube was the main orientation. But at-9% Mg, projected patterns related cube orientation were observed.(2) At high temperature grain growth process of pure Al were observed. Isochronally some grains disappeared or had become very small, otherwise many grains hold their size. At high temperatures, change of X-ray integrated intensity, corresponding to crystal grain size, were observed dynamically.4. Successively, strain of grains and pole figures composed by grains with different grain size will be studied.