King A, Johnson G, Engelberg D, Ludwig W, Marrow J
School of Materials, University of Manchester, Manchester M13 9PL, UK.
Science. 2008 Jul 18;321(5887):382-5. doi: 10.1126/science.1156211.
Nondestructive three-dimensional mapping of grain shape, crystallographic orientation, and grain boundary geometry by diffraction contrast tomography (DCT) provides opportunities for the study of the interaction between intergranular stress corrosion cracking and microstructure. A stress corrosion crack was grown through a volume of sensitized austenitic stainless steel mapped with DCT and observed in situ by synchrotron tomography. Several sensitization-resistant crack-bridging boundaries were identified, and although they have special geometric properties, they are not the twin variant boundaries usually maximized during grain boundary engineering.
通过衍射对比断层扫描（DCT）对晶粒形状、晶体取向和晶界几何结构进行无损三维映射，为研究晶间应力腐蚀开裂与微观结构之间的相互作用提供了机会。一条应力腐蚀裂纹在通过DCT映射的敏化奥氏体不锈钢体积中扩展，并通过同步加速器断层扫描进行原位观察。识别出了几个抗敏化的裂纹桥接边界，尽管它们具有特殊的几何特性，但它们并不是通常在晶界工程中最大化的孪晶变体边界。
