SINGLE CRYSTALS

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$50,447.00
Award Year:
1983
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
263
Agency Tracking Number:
263
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
4401 Dayton-xenia Road, Dayton, OH, 45432
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
V. Srinivasan
(513) 426-6900
Research Institute:
n/a
Abstract
THE PROPOSED RESEARCH ADDRESSES IN AN EXPLORATORY WAY THE PROBLEM OF HIGH TEMPERATURE LOW CYCLE FATIGUE (HTLCF) IN SINGLE CRYSTAL NICKEL BASE ALLOY, RENE N4. THIS ALLOY BELONGS TO THE LATEST CLASS OF ALLOYS IDENTIFIED FOR APPLICATION IN FUTURE MILITARY AIRCRAFTS. THE SCOPE OF THIS PROPOSAL INCLUDES STUDIES ON SAMPLES WITH HIGH TEMPERATURE PROTECTIVE ALUMINIDE COATING. FATIGUE TESTS WILL BE CONDUCTED IN LAB AIR ON CYLINDRICAL SAMPLES WITH (001) ORIENTATION, OR THE ONE CLOSER TO IT PARALLEL TO THE STRESS AXIS. ONE TEMPERATURE, ONE FREQUENCY, AND THREE STRAIN RANGES WILL BE USED, MICRO-STRUCTURE AND DAMAGE ACCUMULATION WILL BE STUDIED EXTENSIVELY THROUGH OPTICAL, SCANNING AND TRANSMISSION ELECTRON MICROSCOPY TECHNIQUES. PROCEDURE FOR THIN-FOIL PREPARATION FOR TEM STUDY WILL BE STANDARDIZED. TEST RESULTS WILL BE DISCUSSED IN TERMS OF COFFIN-MANSON AND OTHER LIFE PREDICTION PROCEDURES. STRUCTURE-PROPERTY CORRELATION WILL BE ESTABLISHED TO UNDERSTAND MICRO-MECHANISM OF DAMAGE AND THE ROLE OF COATING THEREIN.

* information listed above is at the time of submission.

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