Mg-Zn合金析出相的互补体视学TEM/SAXS无定形尺寸分布
Form-free size distributions from complementary stereological TEM/SAXS on precipitates in a Mg-Zn alloy
摘要：
这项工作描述了一个多学科的研究方法，用于量化多晶合金中纳米级沉淀物的尺寸分布。利用互补透射电子显微镜（TEM）和小角X射线散射（SAXS）研究了等温时效Mg-Zn合金中析出相的生长。TEM用于鉴定作为棒状β'颗粒的沉淀相并确定它们的半径和纵横比。随后，从大量的合金获得的SAXS数据解释通过一种新的蒙特卡罗方法，以获得准确的，自由的尺寸分布。通过这两种方法测量的颗粒半径分布之间获得了良好的一致性，举例说明了这种互补的方法来研究沉淀在织构合金中含有颗粒各向异性与明确的取向关系的矩阵的适用性。
英文摘要：
This work describes a multidisciplinary research methodology for quantifying the size distribution of nanoscale precipitates in polycrystalline alloys. Complementary transmission electron microscopy (TEM) and small-angle x-ray scattering (SAXS) are employed in a study of precipitate growth in an isothermally aged Mg-Zn alloy. TEM is used to identify the precipitate phases as rod-shaped β' particles and to determine their radii and aspect ratio. Subsequently, SAXS data obtained from bulk quantities of the alloy is interpreted via a novel Monte-Carlo method to obtain accurate, form-free size distributions. Good agreement was obtained between particle radii distributions measured by both methods, exemplifying the applicability of this complementary methodology to study precipitation in textured alloys containing particles anisotropic with well-defined orientation-relationships to the matrix.
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