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 theref
2、rom, 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 2014 SAE InternationalAll rights reserved. No part of this publi
3、cation 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: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4992BAEROSPACE MATERIAL SPECIFICATIONAMS4992 REV. BIssued 2002-10Revised 2014-04Supersedin
5、g AMS4992ACasting, Structural Investment, Titanium Alloy 6Al - 4VHot Isostatically Pressed(Similar to UNS R56401)RATIONALEAMS4992B results from a Five Year Review and update of this specification that aligns hydrogen sample mass with ASTM E 1447 and standardizes reporting requirements.1. SCOPE1.1 Fo
6、rmThis specification covers titanium Ti 6Al-4V alloy in the form of investment castings.1.2 ApplicationThese castings have been used typically for structurally cast components requiring a combination of good strength-to-weight ratio and corrosion resistance, but usage is not limited to such applicat
7、ions.2. APPLICABLE DOCUMENTSThe 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 specified. When the referen
8、ced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (ou
9、tside USA), www.sae.org.AMS2175 Castings, Classification and Inspection ofAMS2249 Chemical Check Analysis Limits, Titanium and Titanium AlloysAMS2694 Repair Welding of Aerospace CastingsAMS2750 PyrometryAMS2804 Identification, CastingsSAE INTERNATIONAL AMS4992B Page 2 of 102.2 ASTM PublicationsAvail
10、able from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM B 600 Descaling and Cleaning Titanium and Titanium-Alloy SurfacesASTM E 8 / E 8M Tension Testing of Metallic MaterialsASTM E 539 Analysis of Titanium Alloys by X
11、-Ray Fluorescence SpectrometryASTM E 1320 Reference Radiographs for Titanium CastingsASTM E 1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert Gas Fusion TechniqueASTM E 1417 Liquid Penetrant TestingASTM E 1447 Determination of Hydrogen in Titanium and Titanium Al
12、loys by the Inert Gas Fusion Thermal Conductivity/Infrared Detection MethodASTM E 1742 Radiographic ExaminationASTM E 1941 Determination of Carbon in Refractory and Reactive Metals and Their Alloys by Combustion AnalysisASTM E 2371 Analysis of Titanium and Titanium Alloys by Direct Current Plasma an
13、d Inductively Coupled Atomic Emission Spectrometry3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1; carbon shall be determined in accordance with ASTM E 1941, hydrogen in accordance with ASTM E 1447, oxygen and nitrogen in accordance with ASTM E 140
14、9, and other elements in accordance with ASTM E 539 or ASTM E 2371. Other analytical methods may be used if acceptable to the purchaser.TABLE 1 - COMPOSITIONElement min maxAluminumVanadiumIronOxygenCarbonNitrogenHydrogen Yttrium (3.1.1)Other Elements, each (3.1.1)Other Elements, total (3.1.1)Titaniu
15、m5.503.50-0.15-remainder6.754.500.300.200.100.050.0150.0050.100.40(500 ppm)(150 ppm)( 50 ppm)3.1.1 Determination not required for routine acceptance.3.1.2 Check AnalysisComposition variations shall meet the applicable requirements of AMS2249.SAE INTERNATIONAL AMS4992B Page 3 of 103.2 Melting Practic
16、e3.2.1 Castings and specimens shall be poured at the casting vendors facility either from a remelt (See 8.2.3) of a master heat or directly from a master heat (See 3.2.2).3.2.1.1 Remelt for CastingThe metal for castings and specimens shall be remelted and poured under inert gas pressure in accordanc
17、e with 3.2.2.1, or under vacuum without loss of vacuum between melting and pouring.3.2.1.2 If authorized by purchaser (See 8.2.4), portions of two or more qualified master heats of 3.2.3 may be remelted together and poured into castings using a procedure acceptable to purchaser.3.2.1.3 Remelt for ca
18、sting shall be performed using consumable electrode-practice or other method authorized by purchaser.3.2.2 Master Heat PreparationA master heat shall be prepared from any combination of elemental and revert materials which are melted and refined as necessary in a single furnace charge. Single or mul
19、tiple melting shall be accomplished using consumable electrode, nonconsumable electrode, electron beam, or plasma arc practice(s).3.2.2.1 The atmosphere for melting shall be vacuum or shall be argon and/or helium at an absolute pressure not higher than 1000 millimeters of mercury.3.2.2.2 Revert (gat
20、es, sprues, risers, and rejected castings) may be used in the preparation of master heats; revert shall not be remelted directly, without refining, for pouring of castings. Melting of revert creates a new master heat.3.2.2.3 Solidification of the master heat into pigs or ingots before remelting and
21、pouring of castings is permitted.3.2.2.4 The master heat source shall establish effective control procedures, including parameters for the critical variables that will consistently produce material suitable for remelting of castings, meeting the requirements of this specification. Control procedures
22、 shall be acceptable to purchaser and casting vendor.3.2.3 Master Heat QualificationEach master heat shall be qualified by chemical analysis and tensile specimens.3.2.3.1 Separately cast specimens may be used for qualification of master heats only. Master heats may also be qualified using integrally
23、-cast specimens (See 8.2.5) or specimens machined from a casting and shall conform to 3.2.1.3.2.3.2 The acceptance tests of 4.2.1 may be used to satisfy the qualification requirements of 3.2.3.3.3 Condition3.3.1 All castings shall be hot isostatically pressed.3.3.2 A separate annealing operation may
24、 be performed, at the vendors option, but it is not required unless specified by the purchaser.3.3.3 The vendor shall record the type of thermal processing performed as a control factor of 4.4.2.2.3.3.4 If welding is performed (See 3.7.4.1), castings shall be hot isostatically pressed and/or anneale
25、d after welding (See 3.7.4.2).SAE INTERNATIONAL AMS4992B Page 4 of 103.4 Test Specimens3.4.1 Chemical Analysis SpecimensShall be of any convenient size and shape.3.4.2 Tensile SpecimensSample material shall be of sufficient size to permit the preparation of round tensile specimens of 0.250 inch (6.3
26、5 mm) diameter conforming to ASTM E 8 / E 8M with a gage length of 1 inch (25.4 mm). When agreed upon by purchaser and vendor (See 8.2.6), specimens may be of different size, or may be flat, rectangular, or cast-to-size (See 8.5 and 8.6).3.4.2.1 Integrally-Cast SpecimensShall be prepared from sample
27、 material attached to castings and tested for tensile property determination as specified in Table 2. Unless otherwise specified by purchaser, the following shall apply:3.4.2.1.1 Sample material quantity(s), location(s), and thickness(es) shall be agreed upon by purchaser and vendor (See 8.4). Addit
28、ional sample material may be added for retesting or for foundry purposes, at the option of the foundry.3.4.2.1.2 Sample material shall remain attached to the casting until completion of hot isostatic pressing and heat treatment. When acceptable to purchaser, sample material may be removed to accommo
29、date straightening or other processing, in which case each removed sample shall be identified for traceability and processed with casting(s) through all subsequent operations.3.4.2.2 Specimens Machined from CastingsShall be excised and tested for tensile property determination as specified in Table
30、2. The quantity(s) and location(s) shallbe as agreed upon by purchaser and vendor (See 8.4).3.4.3 After machining and chemical cleaning, tensile specimens shall be free of oxygen-rich layer, such as alpha case, or other surface contamination.3.5 Thermal ProcessingCastings and representative tensile
31、specimens shall be hot isostatically pressed in accordance with 3.5.1. When performed (See 3.3.2), annealing shall be in accordance with 3.5.2.3.5.1 Hot Isostatic PressProcess in inert atmosphere at not less than 14.5 ksi (100 MPa) within the range 1650 to 1750 F (899 to 954 C), hold at the selected
32、 temperature within 25 F (14 C) degrees for 2 to 4 hours, and cool under inert atmosphere in the autoclave to below 800 F (427 C).3.5.2 AnnealProcess in vacuum or inert atmosphere at a temperature within the range 1300 to 1550 F (704 to 843 C), hold at the selected temperature within 25 F (14 C) deg
33、rees for 2 to 4 hours, and cool in the furnace to below 1000 F (538 C). Pyrometry shall be in accordance with AMS2750.3.6 PropertiesCastings and representative specimens shall conform to the following requirements;SAE INTERNATIONAL AMS4992B Page 5 of 103.6.1 Room Temperature Tensile PropertiesShall
34、be as specified in 3.6.1.1, determined in accordance with ASTM E 8 / E 8M 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.3.6.1.1 Integrally Cast and Speci
35、mens Machined from a CastingShall be as shown in Table 2.TABLE 2 - MINIMUM ROOM TEMPERATURE TENSILE PROPERTIESProperty Cross Section ThicknessLess than 0.500 inch(Less than 12.7 mm)0.500 to 1.500 inches, incl(12.7 to 38.1 mm, incl)Over 1.500 to 4.000 inches(Over 38.1 to 101.6 mm)Tensile Strength 125
36、 ksi (861.8 MPa) 123 ksi (848.1 MPa) 120 ksi (827.4MPa)Yield Strength at 0.2% Offset 112 ksi (772.2 MPa) 112 ksi (772.2 MPa) 110 ksi (758.4MPa)Elongation in 4D (%) 5 4 33.6.1.2 When authorized by purchaser, room temperature tensile properties may be determined using separately-cast specimens, in whi
37、ch case sampling and testing frequency by master heat or lot shall be specified by purchaser (See 8.4).3.6.2 Surface ContaminationCastings shall be free of any oxygen-rich layer (such as alpha case), compounds or residue from halogenated solvents, quenchants, or other surface contamination.3.6.2.1 C
38、leaning shall be performed in accordance with ASTM B 600 or other method(s) acceptable to purchaser.3.6.2.2 After cleaning, and prior to any subsequent processing involving temperatures over 500 F (260 C), castings shall be handled in a manner to preclude surface contamination. Handling with clean,
39、dry, white cotton gloves is recommended.3.7 QualityCastings, 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 castings. Castings shall be free of cracks, laps, hot tears, and cold shuts and
40、free of scale and other process induced surface contamination that which would obscure defects.3.7.1 Castings shall be produced under radiographic control. This control shall consist of radiographic examination of each casting part number until foundry manufacturing controls, in accordance with 4.4.
41、2, have been established. Additional radiography shall be conducted in accordance with the frequency of inspection specified by purchaser and as necessary to ensure continued maintenance of internal quality.3.7.1.1 Radiographic examination shall be conducted in accordance with ASTM E 1742 or other m
42、ethod specified by purchaser (See 8.2.7).3.7.2 When specified, castings shall be subjected to fluorescent penetrant testing in accordance with ASTM E 1417 or other method specified by purchaser.3.7.3 Acceptance standards for radiographic, fluorescent penetrant, visual, surface contamination and othe
43、r inspections shall be as agreed upon by purchaser and vendor.3.7.3.1 AMS2175 may be used to specify frequency of inspection (casting class).3.7.3.2 ASTM E 1320 may be used to specify radiographic standards (casting grade).SAE INTERNATIONAL AMS4992B Page 6 of 103.7.4 Castings shall not be peened, pl
44、ugged, impregnated, or welded unless authorized by purchaser.3.7.4.1 When authorized by purchaser, in-process welding in accordance with AMS2694 or other welding program acceptable to purchaser may be used.3.7.4.2 Unless otherwise specified by purchaser, castings shall be hot isostatically pressed a
45、nd/or annealed after welding.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of castings shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory te
46、sting deemed necessary to ensure that the product conform to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), tensile properties (3.6.1), surface contamination (3.6.2), and quality requirements (3.7) are acceptance tests and shall be performed as specified i
47、n 4.3.4.2.2 Periodic TestsRadiographic soundness (3.7.1) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser.4.2.3 Preproduction TestsAll technical requirements are preproduction tests and shall be performed on sample
48、castings (4.3.2), when a change in control factors (4.4.2.2) occurs, and when purchaser deems confirmatory testing to be required.4.3 Sampling and TestingShall be in accordance with the following:4.3.1 One chemical analysis specimen in accordance with 3.4.1 from each master heat or a casting from ea
49、ch master heat shall be tested for conformance to Table 1.4.3.1.1 Except as specified in 4.3.1.2, hydrogen determination shall be on each lot (See 8.2.8) if chemical cleaning (See 8.2.9) is performed after thermal processing, if final anneal heat treatment is performed under inert atmosphere, or if castings are delivered in the hot isostatically pressed condition without subsequent vacuum anneal heat treatmen
