1、AEROSPACE MATERIAL SPECIFICATION AMS4986 REV. E Issued 1987-01 Revised 2015-01 Superseding AMS4986D Titanium Alloy, Forgings 10V - 2Fe - 3Al Consumable Electrode Melted, Single-Step Solution Heat Treated and Overaged 160 ksi (1103 MPa) Tensile Strength (Composition similar to UNS R56410) RATIONALE A
2、MS4986E 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), requires agreement on mechanical property values for material outside specification ranges (3.5.1.1.2 and 8.5), the addition of
3、 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 4.0 inches (101.6 mm) and under in nominal cross-sectional thickness and of forging stock. 1.2 Application These forgings have been used typically for parts in
4、high-stress and stress-corrosion-resistant applications requiring higher fracture toughness, but permitting lower tensile properties than AMS4984, 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 f
5、orms 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 superseding document has been specified, the last published issue of th
6、at 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 724-776-4970 (outside USA, www.sae.org. AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys AMS2750 Pyromet
7、ry _ 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 th
8、erefrom, 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 of thi
9、s 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-
10、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/AMS4986E SAE INTERNATIONAL AMS4986E Page 2 of 7 AMS2808 Identification, Forgin
11、gs AS6279 Industry 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 Metall
12、ic Materials ASTM 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 Titani
13、um 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 Inductively Coupled Plasma At
14、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
15、 accordance with ASTM E2371. Other analytical methods may be used if acceptable to the purchaser. Table 1 - Composition Element min max Vanadium Aluminum Iron Oxygen Carbon Nitrogen Hydrogen Yttrium (3.1.1) (3.1.2) Other Elements, each (3.1.1) Other Elements, total (3.1.1) Titanium 9.0 2.6 1.6 - - -
16、 - - - - remainder 11.0 3.4 2.2 0.13 0.05 0.05 0.015 0.005 0.10 0.30 (500 ppm) (150 ppm) ( 50 ppm) 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, no variation ov
17、er maximum will be permitted. SAE INTERNATIONAL AMS4986E Page 3 of 7 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 o
18、r melts shall be made under vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permitted in the final melt cycle. 3.2.1 The melting 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
19、 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 Solution heat treated, overaged, descaled, and pickled. 3.3.2 Forging Stock As ordered by the forging manufacture
20、r. 3.4 Heat Treatment Forgings shall be solution heat treated and overaged 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 56 C) below the beta transus (See 8.2), ho
21、lding at heat for not less than 30 minutes, and quenching in water. 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 any method acceptable to purchaser. Thermal co
22、ntrols 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 within the range 950 to 1050 F (510 to 566 C), hold at the selected temperature within 10 F (6 C) for not less than 8 hours, and cool to room temperature.
23、 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 specified in Table 2 for forgings 4.0 inches (101.6 mm) and under in nominal cross-sectional thickness, determined in accordance with ASTM E8 / E8M with the rate of str
24、ain 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. SAE INTERNATIONAL AMS4986E Page 4 of 7 Table 2 - Minimum tensile properties Property Value Tensile Strength Yield Strength at
25、0.2% Offset Elongation in 4D Reduction of Area 160 ksi (1103 MPa) 145 ksi (1000 MPa) 6% 10% 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 forgings that a specimen not less than 2.50 inches (63.5 mm)
26、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 55 ksi inch (60 MPa m ), determined in accordance with ASTM E399 for all spec
27、imen 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 KICspecimens shall be in the same direction. If a tensile specimen cannot be excised from
28、 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 toughness requirements may be re-aged in accordance with 3.4.2 and ret
29、ested 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 microstructure shall consist of primary alpha phase in a matrix of aged b
30、eta. An unbroken, continuous alpha phase network along prior beta phase grain boundaries is not acceptable unless purchaser and producer have agreed that such phase is acceptable and tensile and fracture toughness properties are met. 3.5.1.3.2 There shall be no evidence of rejectable beta flecks whe
31、n examined at a magnification of 50 to 100X (See 8.2.2). A rejectable beta fleck exhibits no primary alpha in 0.030 inch by 0.030 inch (0.762 mm by 0.762 mm) or equivalent area. 3.5.1.4 Surface Contamination Except as specified in 3.5.1.4.2, forgings shall be free of any oxygen-rich layer (See 8.3),
32、 such as alpha case, or other surface contamination, as determined by microscopic examination at not lower than 400X magnification, or by other method acceptable to purchaser. 3.5.1.4.1 A surface hardness more than 40 points higher than the subsurface hardness, determined in accordance with ASTM E38
33、4 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 layer is removable within the machining allowance on the forging. 3.5.2 Forging Stock Whe
34、n 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 requirements of 3.5.1.1. If specimens taken from the stock after heat treatment as in 3.4 co
35、nform to the requirements of 3.5.1.1, tests shall be accepted as equivalent to tests of a forged coupon. SAE INTERNATIONAL AMS4986E Page 5 of 7 3.6 Quality The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign material and from imperfections d
36、etrimental 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 comply with AS6279
37、. 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 all required tests. Purchaser reserves the right to sample an
38、d to perform any confirmatory testing deemed necessary to ensure that the product conform 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 contamination (3.5.
39、1.5), and beta transus determination (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 (3.5.2) to demonstrate ability to develop required properties are periodic tests and shall
40、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 time under the s
41、ame fixed conditions, and presented for producers inspection at one time. 4.3.1 For Acceptance Tests 4.3.1.1 Composition One sample from each ingot; except for hydrogen determinations one sample from each lot obtained after thermal and chemical processing is completed. 4.3.1.2 Tensile and Fracture T
42、oughness Properties 4.3.1.2.1 Two samples from a forging or forging prolongations from each lot, sufficient to provide two test specimens for each property to be evaluated. 4.3.1.2.2 Location of tensile and fracture toughness specimens shall be as agreed upon by purchaser and producer. If not define
43、d by purchaser, producer shall select test specimens from the heaviest section and shall select orientation in the following order of preference: longitudinal or transverse for tensile specimens and S-T, T-L, or L-T in accordance with ASTM E399 for fracture toughness specimens. SAE INTERNATIONAL AMS
44、4986E Page 6 of 7 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 invalid on the basis of
45、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. 4.3.1.2.4 Where sufficient material does not exist for retest of the forging having invalid results, the retest may be performed fro
46、m another forging from the same lot. 4.3.1.3 Microstructure and Surface Contamination One or more samples from each lot. Microstructural evaluations may be taken from any convenient location outside the machined part envelope for surface examination and from broken tensile specimens for general micr
47、ostructure. 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 comprising a full ingot shall be sampled on the top and bottom of the ingot. 4.3.1.5 Photographs of the macrostructure and grain flo
48、w pattern shall be provided to purchaser. 4.4 Reports 4.4.1 The producer shall 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), the results of tests for composition and
49、beta transus temperature of each heat and for the hydrogen content, tensile and fracture toughness properties, macrographs of grain flow, micrographs of microstructure as applicable, and results of surface contamination examination of each lot and state that the product conforms to the other technical requirements. This report shall include the purchase order number, heat and lot numbers, AMS4986E, mill produced size o
