EFFECT OF ELECTRON CONCENTRATION ON MECHANICAL PROPERTIES OF ALLOYS OF REFRACTORY METALS

摘要

The present ONR investigation has been concerned with the effects of additions of rhenium on the structural properties of the Group VI-A refractory metals. The term structural is taken to embrace both those properties which normally come under the heading of microstructure, and also those properties which are related to the electronic structure of these materials, ji The electronic structure of the transition metals is an extremely complex problem theoretically. In order that any attack on the problem can be attempted in the near future it is necessary to build up an over-all picture of the way in which the physical properties of these metals are altered by alloying. The experi¬ments which would be most informative on the changes in band structure which accompany alloying are soft X-ray spectroscopy measurements, and low-temperature specific heat measurements. Unfortunately these are techniques which are both time consuming and difficult to perform and which require development of apparatus before results can be trusted.