LOW CYCLE FATIGUE ENHANCEMENT BY ION IMPLANTATION

Award Information
Agency:
Department of Defense
Amount:
$56,729.00
Program:
SBIR
Contract:
N/A
Solitcitation Year:
N/A
Solicitation Number:
N/A
Branch:
Navy
Award Year:
1988
Phase:
Phase I
Agency Tracking Number:
9134
Solicitation Topic Code:
N/A
Small Business Information
Spire Corp
Patriots Pk, Bedford, MA, 01730
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
N/A
Principal Investigator
 DR PIRAN SIOSHANSI
 (617) 275-6000
Business Contact
Phone: () -
Research Institution
N/A
Abstract
ION IMPLANTATION IS AN EFFECTIVE PROCESS TO CREATE COMPRESSIVE STRESS IN THE SUBSURFACE REGIONS OF METALLIC COMPONENTS AND THEREBY ENHANCE THEIR RESISTANCE TO FATIGUE INITIATED FAILURES. ION IMPLANTATION OF LIGHT INTERSTITIAL IONS (SUCH AS BORON, CARBON OR NITROGEN) INTO TITANIUM-BASED ALLOYS (OR FERROUS ALLOYS) IS A MICROSCOPIC SHOT PEENING PROCESS THAT CREATES TREMENDOUS COMPRESSIVE STRESS ON THE SURFACE OF TREATED COMPONENTS. THE COMPRESSIVE STRESS IS THE UNDERLYING REASON FOR THE SLOWDOWN IN THE CRACK INITIATION PHASE AND CRACK PROPAGATION MODE. IN ADDITION THE PROCESS HAS BEEN SHOWN TO BE VERY EFFECTIVE TO MINIMIZE GALLING (ESPECIALLY IN TITANIUM BASED ALLOYS) AND NOTCH CREATION IN HANDLING OF TITANIUM ALLOYS THAT CAN GIVE RISE TO FATIGUE FAILURE.

* information listed above is at the time of submission.

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