Accession Number:

AD0269873

Title:

LONG-RANGE ORDER IN FE RICH FE-AL ALLOYS. V. ROOM TEMPERATURE DEFORMATION BEHAVIOR

Descriptive Note:

Scientific note

Corporate Author:

TECHNION - ISRAEL INST OF TECH HAIFA

Personal Author(s):

Report Date:

1961-08-01

Pagination or Media Count:

19.0

Abstract:

The room temperature deformation behavior of FeAl alloys near the composition Fe3Al was studied as a function of quenching temperature degree of order. A slip trace study showed 110 to be the dominant slip plane with 211 and 321 also participating. The relative slip plane preference was independent of the quench ng temperature. The yield stress of polycrystalline specimens and the critical resolved shear stress of single crystals was determined as a function of quenching temperature. A second strength maximum was also observed in the 700 to 750 C quenching temperature range x-ray results showed complete suppression of Fe3Al type order, and no variation in the degree of retained FeAl type order. A third strength vs quenching temperature rise was observed at about 900 C, which it is suggested may be due to vacancy strengthening. Youngs modulus exhibited anomalous behavior, increasing with increasing quenching temperature. The Youngs modulus behavior did not correlate with the disordering of the Fe3Al superlattice. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE