1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS4471A AEROSPACE MATERIAL SPECIFICATION AMS4471 REV. A Issued 2012-07 Revised 2
5、014-06 Superseding AMS4471 Cast Aluminum Alloy Composite 4.6Cu - 3.4Ti - 1.4B - 0.75Ag - 0.27Mg (205.0/TiB2/3p-T7P) Investment Cast, Solution and Precipitation Heat Treated RATIONALE AMS4471A revises the Title (Also see 8.3) and Tensile Properties (Table 2). 1. SCOPE 1.1 Form This specification cove
6、rs a dilute aluminum/TiB2metal matrix composite in the form of investment castings. 1.2 Application These castings have been used typically for components requiring high strength and/or elevated temperature performance, but usage is not limited to such applications. 1.3 Safety - Hazardous Materials
7、While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with
8、the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms a part of this specification to th
9、e extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Public
10、ations Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2175 Casting, Classification and Inspection of AMS2360 Room Temperature Tensile Properties of Castings SAE INTERNATIONA
11、L AMS4471A Page 2 of 8 AMS2694 In-Process Welding of Castings AMS2771 Heat Treatment of Aluminum Alloy Castings AMS2804 Identification, Castings AS1990 Aluminum Alloy Tempers 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-29
12、59, Tel: 610-832-9585, www.astm.org. ASTM B 557 Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products ASTM B 557M Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric) ASTM E 29 Using Significant Digits in Test Data to Determine Conformance with Specifica
13、tions ASTM E 34 Chemical Analysis of Aluminum and Aluminum-Base Alloys ASTM E 155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings ASTM E 716 Sampling and Sample Preparation of Aluminum and Aluminum Alloys for Determination of Chemical Composition by Spectrochemical Analysis A
14、STM E 1251 Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry ASTM E 1417 Liquid Penetrant Testing ASTM E 1742 Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined by wet chemical method
15、s in accordance with ASTM E 34, by spectrochemical methods in accordance with ASTM E 1251, or by other analytical methods acceptable to purchaser (See 3.4.1). TABLE 1 COMPOSITION Element min max Iron - 0.08 Copper 4.2 5.0 Magnesium 0.20 0.33 Titanium (1)3.0 3.85 Boron (1)1.25 1.55 Silicon - 0.10 Sil
16、ver 0.6 0.9 Other Elements, each 0.08 Other Elements, total - 0.17 Aluminum remainder (1)Titanium and Boron are present as TiB2reinforcement in the cast alloy matrix. SAE INTERNATIONAL AMS4471A Page 3 of 8 3.1.1 Test results may be rounded by the “rounding off” method of ASTM E 29. 3.2 Condition Sol
17、ution and precipitation heat treated to the T7 temper (See AS1990). 3.3 Castings Castings shall be produced from metal conforming to 3.1, determined by analysis of specimens cast as in 3.4.1. 3.4 Cast Test Specimens Chemical analysis specimens and tensile specimens shall be cast as follows: 3.4.1 Ch
18、emical Analysis Specimens Two specimens shall be cast from each melt. The first shall be taken after the last melt addition and the second shall be after the last casting has been poured. Both specimens shall be tested to qualify the melt as in 3.1. Spectrochemical samples shall be prepared in accor
19、dance with ASTM E 716. 3.4.2 Tensile Specimens Shall be produced as follows: 3.4.2.1 Specimens Cut from a Casting and Specimens from Integrally Cast Coupons Shall be removed after heat treatment, shall conform to ASTM B 557 or ASTM B 557M and shall be either 0.500 inch (12.70 mm) diameter at the red
20、uced parallel gage section, standard sheet type specimens, or subsize specimens proportional to the standard as required by 3.6.1. 3.4.2.2 Separately Cast Specimens Shall conform to ASTM B 557 or ASTM B 557M and shall be cast from each melt after the last melt additions. Specimens shall be cast in m
21、olds representing the mold used for castings. Chills are not permitted on test specimen cavity, except on the end face of the specimen when approved in accordance with 4.4.2. 3.5 Heat Treatment Heat treatment shall conform to the requirements of AMS2771. Heat treatment parameters are proprietary. 3.
22、6 Properties Castings and representative tensile specimens produced in accordance with 3.4.2 shall conform to the following requirements: 3.6.1 Tensile Properties Shall be as follows, determined in accordance with ASTM B 557 or ASTM B 557M; conformance to the requirements of 3.6.1.1 shall be used as
23、 basis for acceptance of castings except when purchaser specifies that the requirements of 3.6.1.2 or 3.6.1.3 apply. 3.6.1.1 Specimens Cut From Castings Specimens as in 4.3.3 shall have the properties shown in Table 2. SAE INTERNATIONAL AMS4471A Page 4 of 8 TABLE 2 - MINIMUM TENSILE PROPERTIES Prope
24、rty Value Tensile Strength 66.0 ksi (455 MPa) Yield Strength at 0.2% Offset 59.0 ksi (407 MPa) Elongation in 4D 3.0% 3.6.1.1.1 When properties other than those of Table 2 are required, tensile specimens as in 4.3.3 machined from locations indicated on the drawing, from a casting or castings chosen a
25、t random to represent the lot, shall have the properties indicated on the drawing for such specimens. Property requirements may be designated in accordance with AMS2360. 3.6.1.2 Integrally Cast Specimens Specimens as in 4.3.3.1 shall have the properties shown in Table 2. 3.6.1.3 Separately Cast Spec
26、imens Specimens as in 4.3.3.2 shall have the properties shown in Table 2. 3.7 Microstructure and Particle Homogeneity The microstructure and reinforcing particle homogeneity in purchaser designated areas of the casting shall not exceed the limits established during process approval (See 4.3.4, 4.4.2
27、.1). Castings which exhibit an unacceptable microstructure/homogeneity shall be held for disposition by purchasers cognizant engineering personnel. Castings shall not be rejected, however, if the requirements of 3.6.1.2 are met. 3.8 Quality Castings, as received by purchaser, shall be uniform in qua
28、lity and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the castings. 3.8.1 When acceptance standards are not specified, Grade C of AMS2175 shall apply. 3.8.2 Methods of inspection and frequency of inspection shall be as agreed upon by purchaser and
29、vendor. A “Casting Class” of AMS2175 may be selected to specify the method and frequency of inspection. 3.8.3 Castings shall be produced under radiographic control. This control shall consist of 100% radiographic inspection of castings until process control factors (4.4.2) have been established to e
30、nsure production of acceptable castings. Unless otherwise specified by purchaser, continued radiographic inspection of production castings shall be performed at a frequency determined by the vendor to ensure continued maintenance of internal quality. 3.8.3.1 Radiographic inspection shall be conducte
31、d in accordance with ASTM E 1742, unless otherwise specified by purchaser. 3.8.4 When specified by purchaser, castings shall be fluorescent penetrant inspected using a method specified by purchaser, or, if not specified, a method in accordance with ASTM E 1417. 3.8.5 Castings shall not be peened, pl
32、ugged, impregnated, or welded unless authorized by purchaser. 3.8.5.1 When authorized by purchaser, welding in accordance with AMS2694 or other welding program approved by purchaser may be used. The welding procedures used for these castings are proprietary. SAE INTERNATIONAL AMS4471A Page 5 of 8 4.
33、 QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of castings shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ens
34、ure that the castings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Except as specified in 4.2.1.1, composition (3.1), tensile properties of specimens cut from castings (3.6.1.1) or, when specified, from integrally cast coupons (3.6.1.2) or separately cast spe
35、cimens (3.6.1.3), and quality (3.8) are acceptance tests and shall be performed to represent each melt or heat treat lot as applicable. 4.2.1.1 Tensile properties of separately cast specimens or integrally cast coupons shall be determined when specified by purchaser or when specimens cut from castin
36、gs cannot be obtained. Tensile properties of separately cast specimens or from integrally cast coupons need not be determined when tensile properties of specimens cut from castings are determined. 4.2.2 Periodic Tests Microstructure and TiB2homogeneity analysis (3.7) and radiographic inspection (3.8
37、.3) following the establishment of process control (4.4.2) are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. 4.2.3 Preproduction Tests All technical requirements are preproduction tests and shall be performed on the
38、 first-article shipment of a casting to a purchaser, when a change in material and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing Shall be in accordance with the following: 4.3.1 Two chemical analysis specimens in
39、 accordance with 3.4.1 from each melt for conformance to 3.1. 4.3.2 One or more preproduction castings in accordance with 4.4.1 of each part number. 4.3.3 Not less than two tensile specimens machined from a casting or castings from each heat treat lot except when purchaser specifies use of separatel
40、y cast specimens as in 4.3.3 or integrally cast coupons as in 4.3.3.1. If the number and locations of specimens are not shown on the drawing, not less than two specimens, one from the thickest section and one from the thinnest section, shall be cut from a casting or castings from each heat treat lot
41、. 4.3.3.1 When permitted by purchaser, test bars integrally cast with the castings may be tested in lieu of testing specimens cut from castings. Size, number, and location of integrally cast coupons shall be as specified on the casting drawing or as agreed upon by purchaser and vendor. 4.3.3.2 When
42、permitted by purchaser, separately cast test bars may be tested in lieu of testing specimens cut from castings. SAE INTERNATIONAL AMS4471A Page 6 of 8 4.3.4 Microstructure and TiB2particle homogeneity of a casting shall be analyzed in the thickest and thinnest sections of the casting, in any purchas
43、er designated areas of the casting, and in the representative tensile specimens to establish limits for acceptance. Analysis methods and limits are proprietary, and subject to supplier control but will include optical micrograph analysis (See 4.4.2.1). 4.4 Approval 4.4.1 Sample castings from new or
44、reworked patterns or molds and the casting procedure shall be approved by purchaser before castings for production use are supplied, unless such approval be waived by purchaser. 4.4.2 Vendor shall establish, for production of sample castings of each part number, parameters for the process control fa
45、ctors which will produce acceptable castings; these shall constitute the approved casting procedure and shall be used for producing production castings. Vendor shall also establish control factors for producing separately cast tensile specimens, but these control factors need not be identical to tho
46、se used for production of castings. If necessary to make any change in parameters for the process control factors, vendor shall submit for reapproval a statement of the proposed changes in processing and, when requested, sample castings, test specimens, or both. Production castings incorporating the
47、 revised operations shall not be shipped prior to receipt of reapproval. 4.4.2.1 Control factors for producing castings and separately cast tensile specimens include, but are not limited to the following. Suppliers procedures shall identify tolerances, ranges and/or control limits as applicable. Typ
48、e of furnace Furnace atmosphere Alloy additions, fluxing, deoxidation, and gas removal procedures Casting process control factors specific to this alloy to ensure consistent melt homogeneity Gating and risering practice Mold composition and molding practice Core composition and fabrication method, w
49、hen applicable Metal pouring temperature Solidification and cooling procedures Solution heat treat and precipitation hardening cycles Straightening procedure, when applicable Cleaning operations Methods of inspection Radiographic inspection sampling plan, if used Welding procedure Limits for acceptance and laboratory test method for microstructure and reinforcement particle homogeneity. 4.4.2.1.1 Any of the above process control facto
