Ductility Enhancement Processes in Dislocation-Mobility Limited Materials

这项研究包括对导致位错迁移率有限的材料的延展性增强的基本因素的实验和理论研究。这是一个重要的问题，因为许多坚固的结构材料延性较低。这项研究将主要涉及有序的金属间化合物镍铝化物和铁铝化物。要研究的具体问题是(A)现象的一般方面，(B)控制延性的基本因素，以及(C)循环变形与单调变形的关系。这些结果在复合材料界面上的应用也将被研究。

The proposed research consists of an experimental and theoretical study of the basic factors that lead to enhanced ductility in materials with limited dislocation mobility. This is an important problem because many strong structural materials have low ductilities. The research will deal primarily with the ordered intermetallic alloys of nickel aluminide and iron aluminide. Specific points to be investigated are (a) the general aspects of the phenomena, (b) the fundamental factors controlling the ductility, and (c) the relationship of cyclic to monotonic deformation. The application of these results to interfaces in composite materials will also be examined.