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 ther
2、efrom, 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 2017 SAE International All rights reserved. No part of this
3、publication 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: +1 724-776-49
4、70 (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:/standards.sae.org/AMS4966R AEROSPACE MATERIAL SPECIFICATION AMS4966 REV. R Issued 1959-01 Revised 2017-06 Supers
5、eding AMS4966P Titanium Alloy, Forgings 5Al - 2.5Sn Annealed, 110 ksi (758 MPa) Yield Strength (Composition similar to UNS R54520) RATIONALE AMS4966R results from a Five-Year Review and update of this specification that includes the addition of ASTM E2994 (3.1), removal of sample size allowance for
6、hydrogen of Table 1 (covered by ASTM E1447), addition of AS6279 (3.7), and revises reporting (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of forgings and forging stock up through 4.0 inches (102 mm) and under in nominal diameter or least distance between parallel s
7、ides and 16 in2(103 cm2) and under in cross-sectional area. 1.2 Application These forgings have been used typically for parts requiring strength up to 800 F (427 C) and that may be welded during fabrication, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue of the foll
8、owing documents in effect on the date of the purchase order forms a part of this specification to the 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 supersedin
9、g document has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2249 Chemical Ch
10、eck Analysis Limits Titanium and Titanium Alloys AMS2750 Pyrometry AMS2808 Identification Forgings SAE INTERNATIONAL AMS4966R Page 2 of 6 ARP1917 Clarification of Terms Used in Aerospace Metals Specifications AS1814 Terminology for Titanium Microstructures 2.2 ASTM Publications Available from ASTM I
11、nternational, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM E8/E8M Tension Testing of Metallic Materials ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion ASTM E1447 Determination of Hyd
12、rogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal Conductivity/Infrared Detection Method ASTM E1941 Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion Analysis ASTM E2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and I
13、nductively Coupled Plasma Atomic Emission Spectrometry ASTM E2994 Analysis of Titanium and Titanium Alloys by Spark Atomic Emission Spectrometry and Glow Discharge Atomic Emission Spectrometry 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1; carb
14、on shall be determined in accordance with ASTM E1941, hydrogen in accordance with ASTM E1447, oxygen and nitrogen in accordance with ASTM E1409, and other elements in accordance with ASTM E2371 or ASTM E2994. Other analytical methods may be used if acceptable to the purchaser. Table 1 - Composition
15、Element Min Max Aluminum 4.00 6.00 Tin 2.00 3.00 Iron - 0.50 Oxygen - 0.20 Carbon - 0.08 Nitrogen - 0.05 (500 ppm) Hydrogen - 0.020 (200 ppm) Yttrium (3.1.1) - 0.005 ( 50 ppm) Other Elements, each (3.1.1) - 0.10 Other Elements, total (3.1.1) - 0.40 Titanium remainder 3.1.1 Determination not required
16、 for routine acceptance. 3.1.2 Check Analysis Composition variations shall meet applicable requirements of AMS2249. SAE INTERNATIONAL AMS4966R Page 3 of 6 3.2 Melting Practice Alloy shall be multiple melted. The first melt shall be made by vacuum consumable electrode, nonconsumable electrode, electr
17、on beam cold hearth, or plasma arc cold hearth melting practice. The subsequent melt or melts shall be made under vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final VAR melt. 3.2.1 The atmosphere for nonconsumable electrode melting shall be vacuum or sha
18、ll be argon and/or helium at an absolute pressure not higher than 1000 mm of mercury. 3.2.2 The electrode tip for nonconsumable electrode melting shall be water-cooled copper. 3.3 Condition The product shall be supplied in the following condition: 3.3.1 Forgings Annealed and descaled. 3.3.2 Forging
19、Stock As ordered by the forging manufacturer. 3.4 Annealing Forgings shall be annealed by heating to a temperature within the range 1325 to 1550 F (718 to 843 C), holding at the selected temperature within 25 F (14 C) for 10 minutes to 4 hours, and cooling as required. Pyrometry shall be in accordan
20、ce with AMS2750. 3.5 Properties The product shall conform to the following requirements and also shall meet the requirements of 3.5.1.1 after being heated in air to 1250 F 15F (677 C 8 C), held at heat for 20 minutes 3 minutes, cooled in air, and descaled. 3.5.1 Forgings Forgings 4.0 inches (102 mm)
21、 and under in nominal diameter or least distance between parallel sides and 16 in2(103 cm2) and under in cross-sectional area shall have the following properties: Testing requirements for product over 4.0 inches (102 mm) in nominal diameter or least distance between parallel sides or over 16 in2(103
22、 cm2) shall be agreed upon by the purchaser and producer and contained in the procurement document. Results of the testing shall be provided in the material certifications. 3.5.1.1 Tensile Properties Shall be as shown in Table 2, determined in accordance with ASTM E8/E8M with the rate of strain set
23、at 0.005 inch/inch/minute (0.005 mm/mm/minute) and maintained within a tolerance of 0.002 inch/inch/minute (0.002 mm/mm/minute) through the 0.2% offset yield strain. Table 2 - Minimum tensile properties Property Value Tensile Strength 115 ksi (793 MPa) Yield Strength at 0.2% Offset 110 ksi (758 MPa)
24、 Elongation in 4D 10% Reduction of Area 25% SAE INTERNATIONAL AMS4966R Page 4 of 6 3.5.1.1.1 Tensile property requirements apply in both the longitudinal and long transverse directions, but tests in the long transverse direction need be made only on product that a specimen not less than 2.50 inches
25、(63.5 mm) in length can be taken. Tests in the long transverse direction are not required on product tested in the longitudinal direction. 3.5.1.2 Microstructure Shall be that structure resulting from processing within the alpha-beta phase field. Microstructure shall conform to 3.5.1.2.1 or 3.5.1.2.
26、2. 3.5.1.2.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network of alpha at prior beta grain boundaries. 3.5.1.2.2 Essentially complete field of equiaxed and/or elongated alpha with or without intergranular beta and with no continuous network of alpha at
27、prior beta grain boundaries. 3.5.1.3 Surface Contamination Except as specified in 3.5.1.3.1, forgings shall be free of any oxygen-rich layer (see 8.2), such as alpha case, or other surface contamination, determined by microscopic examination at 400X magnification or by other method agreed upon by pu
28、rchaser and producer. 3.5.1.3.1 When permitted by purchaser, forgings to be machined all over may have an oxygen-rich layer provided such layer is removable within the machining allowance on the forging. 3.5.2 Forging Stock When a sample of stock is forged to a test coupon and heat treated as in 3.4
29、, specimens taken from the heat treated coupon shall conform to the requirements of 3.5.1.1. If a sample taken directly from the forging stock and heat treated as in 3.4 conforms to 3.5.1.1, testing of a forged coupon is not required. 3.6 Quality The product, as received by purchaser, shall be unifo
30、rm in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product. 3.6.1 Grain flow of die forgings, except in areas that contain flash-line end grain, shall follow the general contour of the forgings showing no evidence of reentrant grain
31、 flow. 3.7 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective September 1, 2018. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers tests and shall be
32、responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests The following requirements are acce
33、ptance tests and shall be performed on each heat or lot as applicable: 4.2.1.1 Composition (3.1) of each heat and hydrogen content of each lot. SAE INTERNATIONAL AMS4966R Page 5 of 6 4.2.1.2 Tensile properties (3.5.1.1), microstructure (3.5.1.2), and surface contamination (3.5.1.3) of each lot of fo
34、rgings as annealed. 4.2.2 Periodic Tests The following requirements are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser: 4.2.2.1 Tensile properties (3.5.1.1) of forgings after reheating as in 3.5. 4.2.2.2 Ability of
35、forging stock to develop required properties (3.5.2). 4.2.2.3 Grain flow of die forgings (see 3.6.1). 4.3 Sampling and Testing Shall be in accordance with the following; a lot shall be all product of the same nominal size from the same heat processed at the same time; a heat shall be the consumable
36、electrode remelted ingots produced from alloy originally melted as a single furnace charge: 4.3.1 For Acceptance Tests 4.3.1.1 Composition One sample from each heat, except that for hydrogen determination, one sample from each lot obtained after thermal and chemical processing has been completed. 4.
37、3.1.2 Tensile Properties The number (minimum of one), location, and orientation of samples from forgings shall be as agreed upon by purchaser and producer. 4.3.1.3 Other Requirements One sample for each lot. 4.3.2 For Periodic Tests As acceptable to purchaser and producer. 4.4 Reports The producer s
38、hall furnish with each shipment a report showing producer identity, country where the metal was melted (i.e., final melt in the case of metal processed by multiple melting operations), results of tests for composition of each heat and for the hydrogen content and tensile properties of each lot, and
39、state that the forgings conform to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS4966R, specific heat treatment used, quantity, product form and size or part number, and melt source of stock used to make the forgings. 4.5 Resampling a
40、nd Retesting If any specimen used in the above tests fails to meet the specified requirements, disposition of the product may be based on the results of testing three additional specimens for each original nonconforming specimen. Failure of any retest specimen to meet the specified requirements shal
41、l be cause for rejection of the product represented. Results of all tests shall be reported. SAE INTERNATIONAL AMS4966R Page 6 of 6 5. PREPARATION FOR DELIVERY 5.1 Identification 5.1.1 Forgings In accordance with AMS2808. 5.1.2 Forging Stock As agreed upon by purchaser and producer. 5.2 Packaging Th
42、e product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A producer shall include
43、this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Revision Indicator A change bar (I) located
44、in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revision
45、s. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 An oxygen-rich layer, such as alpha case, is hard and brittle and results in marked lowering of fatigue properties. 8.3 Terms used in AMS are clarified in ARP1917 and as follows: 8
46、.3.1 Terminology relating to titanium microstructures is presented in AS1814. 8.4 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.5 Purchase documents should specify not less than the following: AMS4966R Product form and size or part number of product desired Quantity of product desired. 8.6 Similar Specifications MIL-F-83142, Type II, Composition 2. PREPARED BY AMS COMMITTEE “G”
