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 2015 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/AMS4984F AEROSPACE MATERIAL SPECIFICATION AMS4984 REV. F Issued 1987-01 Revised 2
5、015-07 Superseding AMS4984E Titanium Alloy Forgings 10V - 2Fe - 3Al Consumable Electrode Melted, Solution Heat Treated and Aged 173 ksi (1193 MPa) Tensile Strength (Composition similar to UNS R56410) RATIONALE AMS4984F results from a Five Year Review and update of this specification that includes th
6、e 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 (3.5.1.1.1 and 8.5), the addition of AS6279 (3.8) and revises the report paragraph (4.4). 1. SCOPE 1.1 Form This specificatio
7、n covers a titanium alloy in the form of forgings 3.000 inches (76.20 mm) and under in nominal cross-sectional thickness and of stock for forging of any size. 1.2 Application These products have been used typically for parts in high stress and stress-corrosion-resistant applications, but usage is no
8、t 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 this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is
9、 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 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA a
10、nd Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2249 Chemical Check Analysis Limits, Titanium and Titanium Alloys AMS2750 Pyrometry SAE INTERNATIONAL AMS4984F Page 2 of 8 AMS2808 Identification Forgings AS6279 Production, Distribution, and Procurement of Metal Stock 2.2 ASTM Publication
11、s 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 E384 Knoop and Vickers Hardness of Materials ASTM E399 Linear-Elastic Plane-Strain Fracture Toughness o
12、f 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 Alloys by the Inert Gas Fusion Thermal Conductivity/Infrared Detection Method ASTM E1941 Determination of Carbon in
13、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 Spectrometry 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown i
14、n 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 ASTM E2371. Other analytical methods may be used if acceptable to the purchaser. Table 1 - Composition
15、 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 - - - - - - - remainder 11.0 3.4 2.2 0.13 0.05 0.05 (500 ppm) 0.015 (150 ppm) 0.005 ( 50 ppm) 0.10 0.30 3.1.1 Determination
16、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 over maximum will be permitted for yttrium. SAE INTERNATIONAL AMS4984F Page 3 of 8 3.2 Melting Practice Alloy shall be mu
17、ltiple 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 under vacuum using vacuum arc remelting (VAR) practice. Alloy additions are not permi
18、tted in the final melt cycle. 3.2.1 The melting atmosphere for nonconsumable electrode melting shall be vacuum or 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 Th
19、e product shall be supplied in the following conditions: 3.3.1 Forgings Solution heat treated, aged, descaled and pickled. 3.3.2 Forging Stock As ordered by the forging manufacturer. 3.4 Heat Treatment Forgings shall be solution heat treated and aged as follows; pyrometry shall be in accordance with
20、 AMS2750: 3.4.1 Forgings shall be single solution heat treated in accordance with 3.4.1.2 unless a double solution heat treatment in accordance with 3.4.1.1 and 3.4.1.2 is specified by purchaser. 3.4.1.1 Forgings shall be heated to a temperature 60 to 100 F (33 to 56 C) below the beta transus (See 8
21、.3.2), held at heat for not less than 30 minutes, and either furnace cooled or air cooled to room temperature. 3.4.1.2 Forgings shall be heated to a temperature 60 to 100 F (33 to 56 C) below the beta transus (See 8.3.2), held at heat for not less than 30 minutes, and quenched in water. 3.4.1.3 Othe
22、r solution heat treatments may be employed when agreed upon by purchaser and producer. 3.4.2 Aging Heat Treatment Heat to a temperature within the range 900 to 975 F (482 to 524 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
23、 a lot of forgings does not meet the minimum fracture toughness requirement of 3.5.1.2, the lot of forgings may be re-aged by heating to a temperature within the range 900 to 975 F (482 to 524 C), holding at the selected temperature within 10 F (6 C) for up to 8 hours, cooling to room temperature, a
24、nd retested for fracture toughness and tensile properties. 3.4.3 Beta Transus Determination The beta transus temperature shall be determined by any method acceptable to purchaser. Thermal controls and readouts shall be calibrated to an accuracy of 5 F (3 C). Beta transus shall be 15 F (8 C). SAE INT
25、ERNATIONAL AMS4984F 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 specified in Table 2, determined in accordance with ASTM E8/E8M with the rate of strain set at 0.005 inch/inch/minute (0.005 mm/mm/minute
26、) 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 Yield Strength at 0.2% Offset Elongation in 4D Reduction of Area 173 ksi (1193 MPa) 160 ksi (1103 MPa) 4% Shal
27、l be reported except when flat sheet type specimens are used 3.5.1.1.1 Mechanical property requirements for product outside the size range covered by 1.1 shall be agreed upon between purchaser and producer. 3.5.1.2 Fracture Toughness KICshall be not lower than 40 ksi (44 MPa ), determined in accorda
28、nce with ASTM E399 for all specimen locations. 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 spe
29、cimen 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 Reduction of Test Data Test data shall be reduced in accordance with ASTM E399 to ca
30、lculate a KQ value and to determine if a valid KICvalue has been measured. Tensile coupons shall be provided for validity verification wherever fracture toughness coupons are specified. In checking for validity, the yield strength value used shall be yield strength measured for the same forging from
31、 which the fracture toughness specimen was obtained. Not less than one 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 direction. If a tensile specimen cannot be excised from t
32、he forging with the fracture plane in the same direction as that of the fracture toughness specimen, the orientation of the tensile specimen shall be approved by the purchaser. 3.5.1.3 Microstructure Shall consist of primary alpha phase in a matrix of aged beta phase when examined at 500X magnificat
33、ion. An unbroken, continuous alpha phase network along prior beta phase grain boundaries in any field of view is not acceptable unless purchaser and producer have agreed that such phase is acceptable and tensile and fracture toughness properties are met. 3.5.1.3.1 No beta flecks shall be visible in
34、material that has been heated up to 1425 F (774 C) or 45 F (25 C) below the beta transus temperature of the matrix, whichever is higher when examined at a magnification of 50 to 100X (See 8.3). A rejectable beta fleck exhibits no primary alpha in a 0.030 x 0.030 inch (0.762 x 0.762 mm) or equivalent
35、 area. inch mSAE INTERNATIONAL AMS4984F Page 5 of 8 3.5.1.4 Macrostructure and Grain Flow The grain flow pattern of macroetch sections taken from designated areas of a forging during initial evaluation shall generally conform to the part shape. If areas are not designated by purchaser, two sections
36、shall be taken normal to the parting line in areas having the greatest section variation. If standards are not established, photomacrographs of acceptable macrostructure of a forging from the first production lot shall be the standard. Presence of laps, seams, folds, etc. is not acceptable. 3.5.1.5
37、Surface Contamination Forgings shall be free of any oxygen-rich layer, such as alpha case, or other surface contamination, determined as in 3.5.1.5.1, by microscopic examination at not lower than 100X magnification, or by other method agreed upon by purchaser and producer. 3.5.1.5.1 Microhardness Di
38、fferential A surface hardness more than 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. 3.5.2 Forging Stock When a sample of stock is forged to a test coupon having a d
39、egree 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 a sample taken directly from the forging stock and heat treated as in 3.4 conforms to the requirements of 3.5.1.1, then t
40、esting 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 material and from imperfections detrimental to usage of the product. 3.6.1 Grain flow of die forgings, except in areas that contain fl
41、ash-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. This requirement becomes effective September 1, 2016. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsib
42、ility 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 testing deemed necessary to ensure that the product conforms to spe
43、cified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), beta-transus temperature (3.4.3), tensile properties (3.5.1.1), fracture toughness (3.5.1.2), microstructure (3.5.1.3), and surface contamination (3.5.1.5) are acceptance tests and shall be performed on each h
44、eat or lot as applicable. 4.2.2 Periodic Tests Macrostructure (3.5.1.4) and grain flow (3.6.1) and ability of forging stock to meet required properties (3.5.2) are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. SAE
45、 INTERNATIONAL AMS4984F Page 6 of 8 4.3 Sampling and Testing Shall be in accordance with 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 same fixed conditions, and presented for producers inspection at on
46、e time; a heat shall be the consumable 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 ingot except that for hydrogen determinations, one sample from each lot obtained after thermal and ch
47、emical processing is completed. 4.3.1.2 Tensile and Fracture Toughness 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 measured. 4.3.1.2.2 Location of tensile and fracture toughness specimens sha
48、ll 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: longitudinal or transverse for tensile specimens and ST, TL, or LT in accordance with ASTM E3
49、99 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 has 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 criteria other than listed above (e.g., crack front curvature, etc.) shall not be used,
