SAE AMS 4979J-2017 Titanium Alloy Bars Wire Forgings and Rings 6Al - 6V - 2Sn Solution and Precipitation Heat Treated (UNS R56620).pdf

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/AMS4979J AEROSPACE MATERIAL SPECIFICATION AMS4979 REV. J Issued 1970-05 Revised 2017-08 Supers

5、eding AMS4979H Titanium Alloy, Bars, Wire, Forgings, and Rings 6Al - 6V - 2Sn Solution and Precipitation Heat Treated (Composition similar to UNS R56620) RATIONALE AMS4979J results from a Five-Year Review and update of this specification that adds ASTM E539 and ASTM E2994 (3.1) and removes sample si

6、ze allowance for hydrogen of Table 1 (covered by ASTM E1447. 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings 4.000 inches (101.60 mm) and under in nominal diameter or least distance between parallel sides and stock of any size for

7、forging or flash welded rings (see 8.6). 1.2 Application These products have been used typically for parts requiring high strength-to-weight ratio up to 750 F (399 C), but usage is not limited to such applications. 1.2.1 Certain processing procedures and service conditions may cause these products t

8、o become subject to stress-corrosion cracking; ARP982 recommends practices to minimize such conditions. 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 the extent supplied herein. The supplier may work to

9、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 Publications Available from SAE International, 400 Commonw

10、ealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2241 Tolerances, Corrosion and Heat Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Bars and Wire AMS2249 Chemical Check Analysis Limits, Titanium and Titaniu

11、m Alloys AMS2368 Sampling and Testing of Wrought Titanium Raw Materials, Except Forgings and Forging Stock SAE INTERNATIONAL AMS4979J Page 2 of 8 AMS2750 Pyrometry AMS2808 Identification, Forgings AMS2809 Identification, Titanium and Titanium Alloy Wrought Products AMS7498 Rings, Flash Welded, Titan

12、ium and Titanium Alloys ARP982 Minimizing Stress-Corrosion Cracking in Wrought Titanium Alloy Products ARP1917 Clarification of Terms Used in Aerospace Metals Specifications AS1814 Terminology for Titanium Microstructures AS6279 Industry Standard Practices for Production, Distribution, and Procureme

13、nt of Metal Stock 2.2 ASTM Publications Available from ASTM International, 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 E539 Analysis of Titanium Alloys by X-Ray Fluorescence Spectromet

14、ry ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion ASTM E1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal Conductivity/Infrared Detection Method ASTM E1941 Determination of Carbon in Refractory and Reac

15、tive Metals and Their Alloys by Combustion Analysis ASTM E2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma and Inductively Coupled Plasma Atomic Emission Spectrometry ASTM E2994 Analysis of Titanium and Titanium Alloys by Spark Atomic Emission Spectrometry and Glow Discharge At

16、omic Emission Spectrometry 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1; carbon 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

17、 accordance with ASTM E539, ASTM E2371 or ASTM E2994. Other analytical methods may be used if acceptable to the purchaser. SAE INTERNATIONAL AMS4979J Page 3 of 8 Table 1 - Composition Element Min Max Aluminum 5.00 6.00 Vanadium 5.00 6.00 Tin 1.50 2.50 Iron 0.35 1.00 Copper 0.35 1.00 Carbon - 0.05 Ox

18、ygen - 0.20 Nitrogen - 0.04 (400 ppm) Hydrogen - 0.015 (150 ppm) Yttrium (3.1.2) - 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 for routine acceptance. 3.1.2 No variation over maximum will be permitted fo

19、r yttrium. 3.1.3 Check Analysis Composition variations shall meet the applicable requirements of AMS2249. 3.2 Melting Practice Alloy shall be multiple melted. The first melt shall be made by vacuum consumable electrode, nonconsumable electrode, electron beam cold hearth, or plasma arc cold hearth me

20、lting practice. The subsequent melt or melts shall be made 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 shall be argon and/or helium at a pressure not higher than 1000 m

21、m 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 Bars Hot finished with or without subsequent cold reduction, solution and precipitation heat treated, and descaled. Th

22、e product shall be produced using standard industry practices designed strictly for the production of bar stock to the procured size. Cut plate shall not be supplied in lieu of bar. 3.3.1.1 Round bars shall be solution and precipitation heat treated and ground, turned, or machined. 3.3.2 Wire Cold d

23、rawn, solution and precipitation heat treated, and descaled. 3.3.3 Forgings and Flash Welded Rings Solution and precipitation heat treated and descaled. SAE INTERNATIONAL AMS4979J Page 4 of 8 3.3.3.1 Flash welded rings shall not be supplied unless specified or permitted on purchasers part drawing. W

24、hen supplied, rings shall be manufactured in accordance with AMS7498. 3.3.4 Stock for Forging or Flash Welded Rings As ordered by the forging or flash welded ring manufacturer. 3.4 Heat Treatment Bars, wire, forgings, and flash welded rings shall be solution heat treated by heating to a temperature

25、within the range 1575 F to 1650 F (857 C to 899 C), holding at the selected temperature within 25 F (14 C) for 60 minutes 5, and quenching in agitated water and precipitation heat treated by heating to a temperature not lower than 1000 F (538 C), holding at the selected temperature within 25 F (14 C

26、) for not less than 4 hours, and cooling in air. Pyrometry shall be in accordance with AMS2750. 3.5 Properties The product shall conform to the following requirements; the applicable limits are those that apply to the specified (ordered) dimension: 3.5.1 Bars, Wire, Forgings, and Flash Welded Rings

27、3.5.1.1 Tensile Properties Shall be as specified in Table 2, determined in accordance with ASTM E8/E8M on product 4.000 inches (101.60 mm) and under in nominal diameter or distance between parallel sides with the rate of strain set at 0.005 inch/inch/minute (0.005 mm/mm/minute) and maintained within

28、 a tolerance of 0.002 inch/inch/minute (0.002 mm/mm/minute) through the 0.2% offset yield strain. 3.5.1.1.1 Tensile property requirements apply in both the longitudinal and transverse directions. Transverse tensile properties of Table 2 apply only to product that a test specimen not less than 2.50 i

29、nches (63.5 mm) in length can be obtained. 3.5.1.1.2 Longitudinal requirements in Table 2 apply to specimens from bars and wire taken with the axis of specimen within 15 of parallel to the grain flow and to specimens from flash welded rings taken in the circumferential direction. 3.5.1.1.3 Yield str

30、ength and reduction of area requirements do not apply to wire under 0.125 inch (3.18 mm) in nominal diameter. Table 2 Table 2A - Minimum tensile properties, inch/pound units Nominal Diameter or Least Distance Between Parallel Sides Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elonga

31、tion in 4D % L Elongation in 4D % T Reduction of area % L Reduction of area % T Up to 1.000, incl 175 160 8 6 20 15 Over 1.000 to 2.000, incl 170 155 8 6 20 15 Over 2.000 to 3.000, incl 155 145 8 6 20 15 Over 3.000 to 4.000, incl 150 140 8 6 20 15 L = Longitudinal T = Transverse SAE INTERNATIONAL AM

32、S4979J Page 5 of 8 Table 2B - Minimum tensile properties, SI units Nominal Diameter or Least Distance Between Parallel Sides Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 4D % L Elongation in 4D % T Reduction of area % L Reduction of area % T Up to 25.40, incl 1207

33、 1103 8 6 20 15 Over 25.40 to 50.80, incl 1172 1069 8 6 20 15 Over 50.80 to 76.20, incl 1069 1000 8 6 20 15 Over 76.20 to 101.60, incl 1034 965 8 6 20 15 L = Longitudinal T = Transverse 3.5.1.1.4 Mechanical property requirements for product outside the size range covered by 1.1 shall be agreed upon

34、between purchaser and producer. 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 (see 8.2). 3.5.1.2.1 Equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network o

35、f alpha at prior beta grain boundaries. 3.5.1.3 Surface Contamination Except as specified in 3.5.1.3.1 and 3.5.1.3.2, the product shall be free of any oxygen-rich layer (see 8.4), such as alpha case, or other surface contamination, determined by microscopic examination at not lower than 400X magnifi

36、cation or by other method agreed upon by purchaser and producer. 3.5.1.3.1 An oxygen-rich layer not greater than 0.001 inch (0.025 mm) in depth will be permitted on bars other than rounds. 3.5.1.3.2 When permitted by purchaser, forgings or flash welded rings to be machined all over may have an oxyge

37、n-rich layer provided such layer is removable within the machining allowance on the forging or flash welded ring. 3.5.2 Forging Stock When a sample of stock is forged to a test coupon and heat treated as in 3.4, specimens taken from the heat treated coupon shall conform to the requirements of 3.5.1.

38、1 and 3.5.1.2. If specimens taken from the stock after heat treatment as in 3.4 conform to the requirements of 3.5.1.1 and 3.5.1.2, the tests shall be accepted as equivalent to tests of a forged coupon. 3.5.3 Stock for Flash Welded Rings A sample of stock heat treated as in 3.4 shall conform to the

39、requirements of 3.5.1.1 and 3.5.1.2. 3.6 Quality The product, as received by purchaser, shall be uniform 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 which contain flash-

40、line and grain, shall follow the general contour of the forgings showing no evidence of reentrant grain flow. SAE INTERNATIONAL AMS4979J Page 6 of 8 3.7 Tolerances Bars and wire shall conform to all applicable requirements of AMS2241. 3.8 Production, distribution, and procurement of metal stock shal

41、l comply with AS6279. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all samples for producers tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory

42、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 acceptance tests and shall be performed on each heat or lot as applicable: 4.2.1.1 Composition (3.1) of each heat. 4.2.1.2 Hydroge

43、n content (3.1), tensile properties (3.5.1.1), microstructure (3.5.1.2), and surface contamination (3.5.1.3) of each lot of bars, wire, forgings, and flash welded rings. 4.2.1.3 Tolerances of each lot of bars and wire (3.7). 4.2.2 Periodic Tests Ability of forging stock (3.5.2) and stock for flash w

44、elded rings (3.5.3) to develop required properties and grain flow of die forgings (3.6.1) are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing Shall be in accordance with AMS2368 and as follo

45、ws; a lot shall be all produce of the same nominal size from the same heat processed at the same time and solution and precipitation heat treated in the same heat treat batch: 4.3.1 For Acceptance Tests 4.3.1.1 Composition One sample from each heat, except that for hydrogen determination one sample

46、from each lot obtained after thermal and chemical processing is completed. 4.3.1.2 Tensile Properties One or more samples from bars, wire, and flash welded rings from each lot. One longitudinal specimen shall be taken from a section having maximum thickness and from a section having minimum thicknes

47、s of a forging from each lot. The samples from bars shall be taken from the center of the bar. 4.3.1.2.1 Specimens from flash welded rings shall be cut from parent metal not including the weld-heat-affected zone. 4.3.1.3 Microstructure and Surface Contamination One or more specimens from each lot sh

48、all be prepared metallographically for microstructure and surface examination. SAE INTERNATIONAL AMS4979J Page 7 of 8 4.3.2 For Periodic Tests As acceptable to purchaser and producer. 4.4 Reports 4.4.1 The producer shall furnish with each shipment a report showing producer identity, country where th

49、e 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, tensile properties, and surface contamination of each lot, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS4979J, product form,