Results of Tests to Determine Effects of Vanadium.
Abstract
The present report deals with effects found in the low power magnification survey that has been made as a preliminary to study at higher powers. Vanadium affects the metallographic structure very greatly. The effect is such that after cooling in the cinder box, the castings have a structure that would be expected in the metal with no V. only after an anneal. With .00V, .05V, .10V, and .20V, the effects of V. are increasingly evident, except that there seems to be little change in structure between metal with .10V and metal with .20V. There is a marked difference between .05V and .10V. The V effect seems to be associated with the rate of cooling of the metal from the molten state. Rapid cooling results in a structure similar to that with no V even when .19V is present. An extremely abnormal structure was found to characterize one casting that was rejected because of a crack. This abnormality may have been caused by abnormal thermal conditions or by the presence of some contamination, as for instance oxygen. The casting histories showed no difference in casting conditions among the castings studied.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1930
- Accession Number
- ADA954830
Entities
People
- H. H. Lester