NASA-CR-197580

FINAL REPORT SUBMITTED TO:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION (NASA)

Lewis Research Center

Report Title:

"Composites Research in Support of the NASP Institute for Composites (NIC)"NCC3-218

Period Covered:

June 1, 1991 through August 31, 1994

Submitted by:

T. Michael Knasel

Director for Research

Ohio Aerospace Institute22800 Cedar Point Road

Cleveland, OH 44142

216/962-3040

November 29, 1994

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https://ntrs.nasa.gov/search.jsp?R=19950012056 2019-03-01T18:08:26+00:00Z

NASA GRANTEE SUBCONTRACTORNEW TECHNOLOGY REPORT

NASA requires each research grantee, research contractor and research subcontractor to report new technology to theNASA Technology Utilization Office. The required reports and corresponding schedules for researach granteesu "bcontraox_ are as follows:

Title of Rcoorl Form Number .Timetable

Individual Disclosure

Interim Report

NASA 666A

LeRC-GSNTR

The grantee subcontractor discloses each discovery of new technologyindividually, at the time of its discovery.

For multi-year grant subcontracts, the subcontractor summarizes the

previous year's disclosures on an annual basis. The first Interim NewTechnology (2qT) Report is due exactly 12 months from the effectivedate of the subcontract.

Final Report

Subontractor Nameand Address:

Report Submitted by:Telephone Number:

NASA Grant Title:

NASA Grant Number:

NASA Grant Monitor:

LeRC-GSNTR The grantee subcontractor submits a cumulative summary of all

disclosed discoveries. This Final NT Report is submitted immediatelyfollowing the subcontract's technical period of performance.

Massachusetts Institute of TechnolOgy

Department of Materials Sciene_e-and Engineering

77 Massachusetts Ave,

Cambridme_ MA 02139

R, M_ Pelloux

(617) 253 - 3314

NASP Institute fo E Composites (NIC)

NC___ff__C3- 218

0AI Mike Knasel

Subcontract Completion Date: 8 / 31 / 94

Today's Date: ..__2_/22/_9__4_

New technology may be either reportable items or subject inventions.

A reportable item is any invention or discovery, whether or not patentable, that was conceived or fimt actually reduced to practice during the performance

of the contract or subcontract. Large business contractors and subcontractors must disclose reportable items as they are discovered and submit a

noncumulative list of these new technology items on an annual basis [ref: Interim NT Report] and a cumulative list at the completion of the contract (orsubcontract) period [re£: Final NT Report].

A subject invention is any invention or discovery, which is or may be patentable, that Was conceived or first actually reduced to practice during the

performance of the Contract or subcontract, Small business contractors and subcontractors must, at a minimum, disclose subject inventions as they are

discovered and submit a cumulative list of these new technology items on an annual basis [ref: Interim NT Report] and at the completion of the contract (orsubcontract) period [ref: Final NT Report].

Grantees, ':mall business contractors and subcontractor are only required to disclose and report patentable Items (subject inventions). We request, however,

that small business contractors and subcontractors disclose both patentable'sad nonpatentable (reportable) Items, both of which are stttomatlcally evaluatedfor publication as NASA tech briefs and considered for NASA Tech Brief awards.

PLEASE COM_PLETE THE ILEVERSE SIDE OF TIIIS FORM AND MAIL TO THE FOLLOWING ADDRESS:

LeRC-GSNTR

7/01/93

• ' • •i i•¸ :_ •: ': •• ¸¸ •? • "

NASA LEWIS RESEARCH CENTER

A'IWN: KATITY KERRIGAN

TECHNOLOGY UTILIZATION OFFICE; MAIL STOP 7-3CLEVELAND, OIIIO 44135

_i_ i_

f, ll¢O._ ,_o-m,l_$ an=• .--_ _o-rnBrmcn

New Technology Report Form Approved IO.M.B. No. 2700-0009

NT CONTROL NO, {OfftczJI USe Only/

INSTRUCTIONS

This form may be used when reporting inventions, discov-

eries, improvements or innovations to NASA. Use of this

report form is optional; provided, however, that whatever

report format is used contain the essential information requested

nerein.

In completing each sec¢Jon, use whatever detail deemed

appropriate for a "'full and complete disclosure." as rec_uired by

the New Technology or Property Rights in Inventions clause. For

further guidance as to what constitutes a satisfactory repot.

please refer to NHB 21"70.3, Documentation. Guidelines for

New Technology Reporting.

Available additional documentation which provides a full, de-

tailed description should be attached, as well as any additional

explanatory sheets where nec=ssary.

1. TITLE Elevated Temperature Tensile and Creep Deformation of a

SiC Fiber-Reinforced Titanium Metal Matrix Composite

2. INNOVATOR(S) (Name and S_I ,.RecuriW No.) *

R. M. Pelloux - SS 534 42 3580

Rita Thursnon - SS 357 68 9567

3. EMPLCYE _ (O_anazBt/on and div*$JOnJ

Massachusetts Institute of

DepOt of Materials Science

Technology

and Engineering

4. A_=RESS [Plat# of P_o_anc_J

77 Massachusetts Ave._

Cambridge, _ 02139

SECTION I -- DESCRIPTION OF THE PROBLEM THAT MOTIVATED THE TECHNOLOGY DEVELOPMENT (Enrer,t,.--Genera/

_¢'_crimrion of ProDlern Ob/eC.tive," S.--Key or Uni¢Tue ProDletw _laracmrittJc: C --P_t HistDr3//Pmof Tecnni_Tue._: G.--iJn_trarion$ of Prior TecnnJoues}

The main goal was to measure the elevated temperature tensile and

creep properties of a SiC fiber-reinforced tiEanium metal matrix

composite.

• _i_

lit _ +

" Suoplyincj mis information is voluntary, in accordance with Public Law g3-579 (Privacy Ac: of 197_,i. However. it _s required for

eligibility in the establishment of Space Act monetary awards.

,IAS.,% FORM 666A APR 85 PREVIOUS E{31TION IS OBSOLETE. I .

• ; ' _ /-_;_;_,_ •_/i __-_I

'SECTION II (Con.)

SECTION III -- UNIQUEOR NOVEL FEATURES OF THE TECHNOLOGY AND THE RESULTS (OR BENEFITS) OF ITS APPLI-CATION (Enter as appropriate A.--Novel or unique features; B. --DevelQOment or conceptual problems; t'__O_era¢in 9 characteristics, test data;D.--Analysis of capabilities; E.'Source of error; and F.--Advan_age_/shortcoming=)

Co - Test data results are given in attached report and in MS thesis.

.

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650°C / 276 MPa

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Conclusions

At 650°C, the UTS of (0)4 and (0/90)sSCS-9/Beta 21S decreases by almost50% from the room temperature values, indicating that operating temperaturesshould be less than 650°C to take advantage of the specific strength as wellas the specific elastic modulus of these composite layups.

The tensile properties of SiC fiber-reinforced titanium composites aredependent on the properties of the fiber reinforcement as well as the fibervolume fraction.

Fracture mechanisms in (0)4SCS-9/Beta 21S are a combination of randomfiber failure throughout the specimen and matrix microyielding aroundfractured fibers.

Failure of (90)4 SCS-9/Beta 21S is dominated by the properties of the metalmatrix.

Fracture mechanisms in (0/90)s SCS-9/Beta 21S are a combination offiber-matrix debonding, random fiber fracture of the 0 ° fibers and matrixmicroyielding around debonded 90 ° fibers and fractured 0° fibers.

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