1、AEROSPACE MATERIAL SPECIFICATION AMS4983 REV. F Issued 1984-04 Revised 2015-01 Superseding AMS4983E Titanium Alloy, Forgings 10V - 2Fe - 3Al Consumable Electrode Melted, Single-Step Solution Heat Treated and Aged 180 ksi (1241 MPa) Tensile Strength (Composition similar to UNS R56410) RATIONALE AMS49
2、83F results from a Five Year Review and update of this specification that includes the removal of sample size allowance for hydrogen of Table 1 (covered by ASTM E1447), revises temperature tolerance on beta transus determination (3.4.1.2), requires agreement on mechanical property values for materia
3、l outside specification ranges (3.5.1.1.2 and 8.5), the addition of AS6279 (3.7) and revises the report paragraphs (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of forgings 1.00 inch (25.4 mm) and under in nominal cross-sectional thickness and of forging stock any s
4、ize. 1.2 Application These forgings have been used typically for parts in high stress and stress-corrosion-resistant applications, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms a part of t
5、his 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 superseding document has been specified, the last published issue of that document shal
6、l apply. _ 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 aris
7、ing therefrom, 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 2015 SAE International All rights reserved. No part
8、of this 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 72
9、4-776-4970 (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/AMS4983F SAE INTERNATIONAL AMS4983F Page 2 of 8 2.1 SAE Publications Ava
10、ilable 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. AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys AMS2750 Pyrometry AMS2808 Identification, Forgings AS6279 Indust
11、ry Standard Practices for Production, Distribution, and Procurement 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 AST
12、M E384 Knoop and Vickers Hardness of Materials ASTM E399 Plane-Strain Fracture Toughness of Metallic Materials ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Technique ASTM E1447 Determination of Hydrogen in Titanium and Titanium Alloys by the
13、 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 Inductively Coupled Plasma Atomic Emission Sp
14、ectrometry 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 accordance with
15、 ASTM E2371. Other analytical methods may be used if acceptable to the purchaser. Table 1 - Composition Element min max Vanadium 9.0 11.0 Aluminum 2.6 3.4 Iron 1.6 2.2 Oxygen - 0.13 Carbon - 0.05 Nitrogen - 0.05 (500 ppm) Hydrogen - 0.015 (150 ppm) Yttrium (3.1.1) - 0.005 ( 50 ppm) Other Elements, e
16、ach (3.1.1) - 0.10 Other Elements, total (3.1.1) - 0.30 Titanium remainder SAE INTERNATIONAL AMS4983F Page 3 of 8 3.1.1 Determination not required for routine acceptance. 3.1.2 Check Analysis Composition variations shall meet the applicable requirements of AMS2249. If yttrium content is determined,
17、no variation over maximum will be permitted. 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 melting practice. The subsequent melt or melts shall be made un
18、der vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle. 3.2.1 The atmosphere for nonconsumable electrode melting shall be vacuum or shall be argon and/or helium at an absolute pressure not higher than 1000 mm of mercury. 3.2.2 The electrode ti
19、p 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 Solution heat treated, aged, and descaled. 3.3.2 Forging Stock As ordered by the forging manufacturer. 3.4 Heat Treatment Forgings shall be solut
20、ion heat treated and aged as follows: Pyrometry shall be in accordance with AMS2750. 3.4.1 Solution Heat Treatment Forgings shall be single solution heat treated by heating to a temperature 60 to 100 F (33 to 55 C) degrees below the beta transus (See 8.2.1), holding at heat for not less than 30 minu
21、tes, and cooling at a rate equivalent to an air cool or faster. 3.4.1.1 Other solution heat treatments may be employed when agreed upon by purchaser and producer. 3.4.1.2 Beta Transus Determination The beta transus temperature shall be determined by a method acceptable to purchaser. Thermal controls
22、 and readouts shall be calibrated to an accuracy of 5 F (3 C). Beta transus accuracy shall be 15 F (8 C). 3.4.2 Aging Heat to a temperature not lower than 900 F (482 C), hold at the selected temperature within 10 F (6 C) for not less than 8 hours, and cool to room temperature. 3.4.2.1 If a lot of fo
23、rgings does not meet the minimum fracture toughness requirement of 3.5.1.2, the lot of forgings may be re-aged at a higher temperature, or held at the original aging temperature, for additional time as required, cooled to room temperature, and retested for fracture toughness and tensile properties.
24、SAE INTERNATIONAL AMS4983F Page 4 of 8 3.5 Properties The aged product shall conform to the following requirements: 3.5.1 Forgings 3.5.1.1 Tensile Properties Shall be as shown in Table 2 for forgings 1.00 inch (25.4 mm) and under in nominal cross-sectional thickness, determined in accordance with AS
25、TM E8 / E8M with the rate of strain set 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 180 ksi (1241 MPa) Yield
26、Strength at 0.2% Offset 160 ksi (1103 MPa) Elongation in 4D 4% Reduction of Area Shall be reported except when flat sheet-type specimens are used 3.5.1.1.1 Tensile requirements apply in both the longitudinal and transverse directions but tests in the transverse direction need be made only on forging
27、s that a specimen not less than 2.50 inches (63.5 mm) in length can be taken. 3.5.1.1.2 Mechanical property requirements for product outside the range covered by 3.5.1.1 shall be agreed upon between purchaser and producer. 3.5.1.2 Fracture Toughness KICshall be not lower than 40 ksi inch (44 MPa m )
28、, determined in accordance with ASTM E399 for all specimen orientations. To facilitate determination of fracture toughness a tensile specimen taken immediately adjacent to the location of the fracture toughness specimen is required. Fracture planes of tensile and KICspecimen shall be in the same dir
29、ection, when possible. When a tensile specimen cannot be excised from the forging with the fracture plane in the same direction as that of the fracture toughness specimen, the orientation of the tensile specimen shall be as approved by purchaser. 3.5.1.2.1 Forgings not meeting the minimum fracture t
30、oughness requirements may be re-aged in accordance with 3.4.2 and retested for fracture toughness and tensile properties. 3.5.1.3 Microstructure Microstructural examination shall be conducted using a magnification of not less than 200X on a suitably etched metallographic specimen. 3.5.1.3.1 The micr
31、ostructure shall consist of primary alpha phase in a matrix of aged beta. An unbroken, continuous alpha phase network along prior beta grain boundaries is not acceptable unless purchaser and producer have agreed that such phase is acceptable and tensile and fracture toughness properties are met. 3.5
32、.1.3.2 There shall be no evidence of rejectable beta flecks when examined at a magnification of 50 to 100X. A rejectable beta fleck exhibits no primary alpha in a 0.030 inch by 0.030 inch (0.762 mm by 0.762 mm) or equivalent area. SAE INTERNATIONAL AMS4983F Page 5 of 8 3.5.1.4 Surface Contamination
33、Except as specified in 3.5.1.4.2, the product shall be free of any oxygen-rich layer (See 8.3), such as alpha case or other surface contamination, determined by microscopic examination at not lower than 400X magnification or other method acceptable to purchaser. 3.5.1.4.1 A surface hardness more tha
34、n 40 points higher than the subsurface hardness, determined in accordance with ASTM E384 on the Knoop scale using a 200 gram load, is evidence of unacceptable surface contamination. 3.5.1.4.2 When permitted by purchaser, forgings to be machined all over may have an oxygen-rich layer provided such la
35、yer 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 having a degree of mechanical working not greater than the forging and heat treated as in 3.4, specimens taken from the heat treated coupon shall conform to the requi
36、rements 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 uniform in quality and condition, sound, and free from foreign materials and f
37、rom 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 flow. 3.7 Production, distribution, and procurement of metal stock shall
38、 comply with AS6279. This requirement becomes effective June 01, 2016. 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 required tests. Purchaser reserves the rig
39、ht 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 Composition (3.1), tensile properties (3.5.1.1), fracture toughness (3.5.1.2), microstructure (3.5.1.3), surface con
40、tamination (3.5.1.5), and beta-transus temperature (3.4.1.2) are acceptance tests and shall be performed on each heat or lot as applicable. 4.2.2 Periodic Tests Grain flow of die forgings (3.6.1) and tests of forging stock to demonstrate ability to meet specified requirements (3.5.2) are periodic te
41、sts 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 not less than the following; a lot shall be all forgings of the same nominal size and configuration from the same heat processed at the same tim
42、e under the same fixed conditions and presented for producers inspection at one time. SAE INTERNATIONAL AMS4983F Page 6 of 8 4.3.1 Acceptance Tests 4.3.1.1 Composition One sample from each ingot; except for hydrogen determination one sample from each lot obtained after thermal and chemical processin
43、g is completed. 4.3.1.2 Tensile and Fracture Toughness Properties 4.3.1.2.1 Two samples from a forging or forging prolongation from each lot, sufficient to provide two test specimens for each property to be measured. 4.3.1.2.2 Location and orientation of tensile and fracture toughness specimens shal
44、l be as agreed upon by purchaser and producer. If not defined by purchaser, producer shall select test specimens from the heaviest section and shall select orientation in the following order of preference: transverse or longitudinal for tensile specimens and S-T, T-L, or L-T in accordance with ASTM
45、E399 for fracture toughness specimens. 4.3.1.2.3 If a KQ value is invalid solely on the basis of either W-a is less than 2.5 (KQ/TYS)2or Pmax/PQ is greater than 1.10 and the thickest possible specimen had been used, the KQ value may be used as KICto satisfy the requirements of 3.5.1.2. KQ values inv
46、alid on the basis of criteria other than listed above (e.g., crack front curvature, etc.) shall not be used, but an additional specimen shall be tested for each of these invalid specimens. Where sufficient material does not exist for retest of the forging having invalid results, the retest may be pe
47、rformed from another forging from the same lot. 4.3.1.2.4 Tensile and fracture toughness properties shall be retested on forgings re-aged in accordance with 3.4.2.1. 4.3.1.3 Microstructure and Surface Contamination One or more samples from each lot. Microstructural evaluations may be taken from any
48、convenient location outside the machined part envelope for surface examination and from broken tensile specimens for general microstructure. 4.3.1.4 Beta Transus Determination One sample each from the top and bottom of an ingot produced from a heat or one sample from each lot except that any lot com
49、prising a full ingot shall be sampled on the top and bottom of the ingot. 4.4 Reports 4.4.1 The producer shall furnish with each shipment a report showing producer name, and country where the metal was melted (e.g., final melt in the case of metal processed by multiple melting operations), the results of tests for composition and beta transus temperature of each heat, and for hydrogen content, tensile and fracture
