REDUCTION OF CONSOLIDATION STRESS IN CERAMIC REINFORCED METAL MATRIX COMPOSITES

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 6100
Amount: $49,830.00
Phase: Phase I
Program: SBIR
Awards Year: 1987
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Materials Reliability Inc
Po Box 949, Naperville, IL, 60566
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 J S SANTNER
 (312) 355-5722
Business Contact
Phone: () -
Research Institution
N/A
Abstract
METAL MATRIX COMPOSITES (MMC) OFFER COMPARABLE MICROCREEP RATES (MCR) AT A FRACTION OF THE COST FOR SPECIALLY PROCESSED ALLOYS IN STABLE MEMBER APPLICATIONS. RESIDUAL STRESSES ARE IMPORTANT TO CONTROL WHEN PARTS PER MILLION OF STRAIN ARE A CONCERN. LARGE VOLUME FRACTIONS OF CERAMIC REINFORCEMENT IN COMPOSITES WILL CONTRIBUTE TO BOTH THE MACRO AND MICRO RESIDUAL STRESSES. THE PROPOSED PROGRAM WILL INVESTIGATE THE USE OF A WORK HARDENING ALLOY (I.E. AL-MG) RATHER THAN PRECIPITATION HARDENED ALLYS (I.E. AL-ZN AND AL-CU) FOR STABLE MEMBER COMPONENTS. X-RAY DIFFRACTION TECHNIQUES WILL BE USED TO MEASURE THE MACRO AND MICRO RESIDUAL STRESSES, MICRO-CREEP TESTS WILL BE CONDUCTED, AND THE USE OF UP-QUENCHING (I.E., QUENCHING IN LIQUID NITROGEN) WILL BE INVESTIGATED AS A MEANS TO CONTROL RESIDUAL STRESSES. PHASE I WILL INCLUDE DEVELOPING A TEST TECHNIQUE FOR COMPARING THE RE-LATIVE MICROCREEP RATE AMONG SEVERAL CONDITIONS OF ALLOYS AND PROCESSES. THE BEHAVIOR OF A WORK HARDENING AND A PRECIPITATION HARDENING MATRIX ALLOY WILL BE COMPARED. LONG TERM AND STATISTICALLY SIGNIFICANT DATA WILL BE DEVELOPED IN PHASE II FOR DIFFERENT ALLOYS. PROCESSING BY UP-QUENCHING CYCLING TO CONTROL RESIDUAL STRESSES WILL ALSO BE EVALUATED. PHASE III WILL MANUFACTURE A COMPONENT USING THE BEST COMBINATION OF MATRIX ALLOY AND PROCESSING FROM PHASE II AND THE MCR RESULTS VERIFIED.

* information listed above is at the time of submission.

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