FAULTING IN COLD-WORKED FE-SI ALLOY FILINGS.
Abstract
Dilute Fe-Si alloys (0-5%Si) were cold worked by making filings at room temperature. The analysis of the broadening of the X-ray powder pattern peaks yields anisotropic particle sizes normal to the (110), (100) and (211) planes which are a consequence of deformation faults (probability alpha) and twin faults (probability beta). The combined fault probability (1.5alpha + beta) increases from 0.01 in pure Fe to 0.02 in Fe5%Si. The root mean square strains vary with crystallographic orientation due to elastic anisotropy of the alloys, and increase from about 0.0035 in pure Fe to 0.005 in Fe5%Si measured in the (100) direction. Assuming that deformation and twin faults occur with equal probability, the X-ray data would imply that the stacking fault energy does not change upon alloying. It is estimated that the stacking fault energy is of the order of 50 erg/sq cm in all Fe-Si alloys. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1966
- Accession Number
- AD0804947
Entities
People
- Christian N. J. Wagner
- Edward N. Aqua
Organizations
- Yale University