1、MIL-PRF-46387A m 9999906 2069233 379 m MIL-PRF-46187A 14 August 1998 SUPERSEDING MIL-P-46187 5 October 1987 PERFORMANCE SPECIFICATION PREPREG, UNIDIRECTIONAL TAPE, CARBON (GRAPHITE) FIBER HIGH TEMPERATURE RESIN IMPREGNATED, 316OC (600OF) This specification is approved for use by all Departments and
2、Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the requirements for carbon fibedhigh temperature resin prepreg in the form of unidirectional tape suitable for the fabrication of structural laminates intended for use at temperatures up to and including 316OC
3、 (6OOOF) (see 6.1) . 1.2 Classification of material. 1.2.1 High temperature resin. An organic resin either thermoset or thermoplastic which can withstand temperatures up to and including 316OC (600F) while still retaining required mechanical, chemical and physical properties. 1.2.2 Prepreg. The carb
4、on (graphite) fiber high temperature resin impregnated unidirectional tape conforming to this specification is termed a “prepreg“ material (preimpregnated). The unidirectional prepreg tape described in this specification is a composite material in which the polyimide resin is partially cured and the
5、 carbon fiber reinforcement is oriented in one direction (unidirectional) . 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recomended
6、 for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. Beneficial comn
7、ents (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, U. S. Army Research Laboratory, Weapons and Materials Research Directorate, ATTN: AMSRL-W“M, APG, MD 21005-5069 by using the Standardization Document I
8、mprovement Proposal (DD Form 1426) appearing at the end of this document or by letter. I 1 AMSC N/A O AREA CMPS Licensed by Information Handling ServicesMIL-PR.F-46 187A 2.2 Government documents. 2.2.1 Specifications, standards and handbooks. The following specifications, standards, and handbooks fo
9、nn a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). HANDBOOKS DEPART
10、MENT OF DEFENSE MIL-HDBK-728/6 - Ultrasonic Testing (Unless otherwise indicated, copies of the above specifications, standards and handbooks are available from the Defense Automated Printing Service (DAPS), 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publication
11、s. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed
12、in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERlALS (ASTM) ASTM D695 ASTM D790 ASTM D1898 ASTM D2344 ASTM D3039/D3039M ASTM D3410/D3410M ASTM D3800 ASTM D4018 ASTM D4102 Standard Test Method for Compressive Properties of Rigid
13、 Plastics Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials Standard Practice for Sampling of Plastics Standard Test Method for Apparent Interlaminar Shear Strength of Parallel Fiber Composites by Short-Beam Method Standard Test
14、 Method for Tensile Properties of Polymer Matrix Composite Materials Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials with Unsupported Gage Section by Shear Loading Standard Test Method for Density of High-Modulus Fibers Standard Test Methods for Tensile Properti
15、es of Continuous Filament Carbon and Graphite Fiber Tows Standard Test Method for Thermal Oxidative Resistance of Carbon Fibers (Application for copies should be addressed to the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) 2 Licensed by Infor
16、mation Handling Services“46187A SOCIETY OF AUTOMOTIVE ENGINEERS, INC. (SAE) AMs 3892/7 Tow or Yarn, Carbon Fibers For Structural Composites GF (OX) 400 (2758) Tensile Strength, 33 (228) Tensile Modulus (Application for copies should be addressed to the Society of Automotive Engineers, 400 Commonweal
17、th Drive, Warrendale, PA 15096.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemptio
18、n has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.2.1 and 6.2). 3.2 High temperature resin. The organic resin either thermoset or thermoplastic shall withstand temperatures up to an
19、d including 316OC (600OF) while still retaining required mechanical, chemical and physical properties. 3.3 Fiber. 3.3.1 Fiber physical properties. The carbon fibers used in the prepreg shall conform to the minimum physical property requirements of AMs 3892/7 or equivalent with any deviations approve
20、d by the procuring activity. Both PAN-base and pitch- base carbon fibers shall be acceptable provided requirements of this specification are met. 3.3.2 Fiber test methods. The ASTM standards D3800, D4018 and D4102 (or approved alternates) shall be used for determining the properties of carbon fibers
21、 as specified in AMs 3892/7. Alternate sampling plans and test methods, as agreed upon, shall be used by the fiber supplier in lieu of AMs 3892/7 sampling plans and test methods. 3.3.3 Fiber sizing. Fiber sizing (or finish) shall be compatible with high temperature resin as specified in the contract
22、 or purchase order. 3.4 Prepreg. The chemical and physical properties of the carbon fiber/high temperature resin unidirectional prepreg shall be furnished by the contractor. 3.5 Comosite laminates. 3.5.1 Physical properties. Carbon fiber/high temperature resin composite physical properties shall be
23、furnished by the contractor. 3.5.2 Mechanical properties. Cured laminate test specimens for determination of mechanical properties shall be ultrasonically “C“ scanned prior to mechanical testing. Military Handbook 728/6 is a useful guide to ultrasonic testing. Carbon fiber/high temperature resin com
24、posite laminates shall conform to the requirements of table I and table II. 3.6 Shelf life. The product shall meet the requirements of this specification when tested at any time up to 6 months from the date of shipment provided the material has been stored in a heat-sealed vapor barrier bag compatib
25、le with thermoplastic or uncured thermoset materials at manufacturer recornended temperatures. 3.7 Prepreg workmanship criteria. The prepreg material shall have a maximum gap width of 0.030 inches. The maximum continuous gap length shall not exceed one 3 Licensed by Information Handling ServicesMIL-
26、PRF46187A foot. The tows shall have no waves greater than 0.030 inches wide. Tow splices shall be considered a defect. Crimps, cured resin, cured matter, resin-starved areas, wrinkles, and foreign materials are not allowed. Tape shall be parallel within f 0.5 degrees. Filaments that are not wetted s
27、hall be 1 per cent maximum in any 144 square inches (0.093 square meters). 3.8 Identification marking. The manufacturers code (part) number, contract number, serial number, date of manufacturer, national stock number, type of material, and the number of this specification shall be permanently marked
28、 in the location specified by the procuring activity (see 6.2). 4. VERIFICATION 4.1 Verification alternatives. Alternative test methods, techniques, or equipment, including the application of statistical process control, tool control, or cost effective sampling procedures may be proposed by the cont
29、ractor. Acceptable alternative verification approaches shall be identified in the contract. 4.2 Classification of inspection. The inspection. requirements specified herein are classified as follows: a. First article inspection (see 4.2.1) b. Conformance inspection (see 4.2.2) 4.2.1 First article ins
30、pection. When required (see 3.11, the first article sample shall be examined for compliance with the requirements and verifications listed in table I and table II. All samples shall be produced with materials and processes proposed for use on the fabrication of structural laminates. Inspection shall
31、 be carried out by the contractor under Government surveillance, when specified (see 6.2) . 4.2.2 Conformance inspection. Conformance inspection for the acceptance of the fabrication of structural laminates shall be conducted on a recurring basis and include the examinations and tests specified here
32、in (see 4.2.2.1 and 4.2.2.2). 4.2.2.1 Material characterization. When specified (see 6.21, the materials described in this specification shall be analyzed for quality control purposes by the following methods as applicable: a. Aniline titration b. Atomic absorption spectroscopy (AA) c. Differential
33、scanning calorimetry (DSC) d. Dynamic mechanical analysis (DMA) e. Gas chromatography (GC) f. High performance liquid chromatography (HPLC) These analyses shall be performed in accordance with material suppliers procedures which are used for production quality control, or in accordance with users pr
34、ocedures which are used for lot acceptance inspection of incoming materials. The exact procedures to be used shall be agreed upon by supplier and user. 4.2.2.2 Mechanical tests. When specified (see 6.21, mechanical tests for conformance shall consist of those tests listed in table I and table II. 4.
35、2.2.3 Noncompliance. If a sample fails to pass conformance inspection, the manufacturer shall notify the procuring activity and the cognizant inspection activity of such failure, and take corrective action on the materials or processes that are subject to the same failure. Acceptance and shipment of
36、 the product shall be discontinued until corrective action, acceptable to the procuring activity has been taken. After the corrective action has been taken, 4 Licensed by Information Handling ServicesflIL-PRF-46L87A m 9999906 20b92L7 TL4 m MIL-PRF46187A conformance inspection shall be repeated on ad
37、ditional sample units (all tests and examinations, or the test which the original sample failed, at the option of the procuring activity). Conformance inspections shall be reinstituted, however, final acceptance and shipment shall be withheld until the conformance inspection has shown that the corre
38、ctive action was successful. In the event of failure after reinspection, information concerning the failure shall be furnished to the cognizant inspection activity and the procuring activity. 4.3 Sampling for inspection. Sampling for inspection shall be performed in accordance with the provisions se
39、t forth in ASTM D1898 or asotherwise specified. 4.4 Test methods. Testing of resins, fibers, prepregs and composite laminates for compliance with the requirements of this specification shall be performed in accordance with the applicable test methods described in this specification to the maxirmun e
40、xtent practicable, or as otherwise specified by the procuring activity. 4.5 Identification marking. Verify the presence of the required markings. 5. PACKAGING 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual pac
41、kaging of materiel is to be performed by DoD personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity within the Military Department or Defense
42、 Agency, or within the Military Departments System Conunand. Packaging data retrieval is available from the managing Military Departments or Defense Agencys automated packaging files, CD- ROM products, or by contacting the responsible packaging activity. 6. NOTES (This section contains information o
43、f a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The composite material specified herein is military unique because it is the only proven material used in aging aircraft replacement parts. This composite has been increasingly accepted as an engineering
44、material for the design and fabrication of aerospace structural components, particularly aeropropulsion structural components. Material procured in accordance with this specification is intended for use in airframe, aerospace, and similarly related primary or secondary load-bearing structures where
45、high stiffness and strength- to-weight ratios are required. Historically PMR-15 resin has been employed but comparable resin systems may be utilized. Polyimide (Pm-15) composite material has been extensively characterized in the NASA Composites for Advanced Space Transportation Systems (CASTS) Progr
46、am, and is used in aircraft engine hardware such as cowls, nozzle flaps, and ducts. 6.1.1 Design allowables. A design allowables test program was conducted on graphite/polyimide composites by NASA (NASA CR-165840) to establish material performance over a ll6OK (-250F) to 589K (600F) temperature rang
47、e. Effects of aging, thermal cycling and moisture were also evaluated. Tension, compression and in-plane shear properties were determined for uniaxial, pseudoisotropic and f 45 degree laminates. Test results show sufficient strength and stiffness to substantiate graphite/polyimide composites as an a
48、cceptable structural material for high temperature structural applications. 5 Licensed by Information Handling ServicesMIL-PRF-4bL87A 999990b 20692LB 950 m MIL-PRF46187A 6.2 Acquisition requirements. Acquisition documents should .specify the following : a. Title, number, and date of the specificatio
49、n. b. Classification of material (see 1.2). c. Issue of DoDISS to be cited in the solicitation, and if required, the d. When first article is required (see 3.1). e. Specify location of identification markings (see 3.8). f. Whether inspection is carried out by the contractor under Government g. Conformance inspection (see 4.2.2.1 and 4.2.2.2). h. Packaging requirements (see 5.1). specific issue of individual documents referenced (see 2.2 and 2.3). surveillance (see 4.2.1). 6.3 Definitions. 6.3.1 Contractor. The term “cntractor is defined as the organization having a direct contra
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