1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSX EOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDO 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 therefrom, LVWKHVROHUHVSR
2、QVLELOLWRIWKHXVHU 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 2016 SAE International All rights reserved. No part of this publication may be reproduced,
3、 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 (outside USA) Fax: 724-776-
4、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/AMS4897D AEROSPACE MATERIAL SPECIFICATION AMS4897 REV. D Issued 1997-01 Revised 2016-09 Superseding AMS4897C T
5、itanium Alloy, Sheet and Strip 15Mo - 3.0AI - 2.8Cb - 0.20Si (Composition Similar to UNS R58210) RATIONALE AMS4897D 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), adds provision for
6、continuous heat treating, requires agreement on mechanical property values for material outside specification ranges (3.5.3), adds alternate flatness tolerance for sheet and strip (3.7), the addition of AS6279 (3.8), adds AMS2368 in sampling and resampling (4.3 and 4.5) and revises the report paragr
7、aph (4.4). 1. SCOPE 1.1 Form This specification covers a titanium alloy in the form of sheet and strip 0.125 inch (3.18 mm) and under in nominal thickness. 1.2 Application These products have been used typically for parts to be formed in the solution heat treated condition and subsequently precipita
8、tion heat treated to obtain high strength-to-weight ratio or stability up to 1100 F (593 C), 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 this specification to the extent specif
9、ied 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 shall apply. 2.1 SAE Publications Availabl
10、e from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2242 Tolerances Corrosion and Heat Resistant Steel, Iron Alloy, Titanium, and Titanium Alloy Sheet, Strip, and Plate AMS2249 Chemic
11、al Check Analysis Limits Titanium and Titanium Alloys SAE INTERNATIONAL AMS4897D Page 2 of 8 AMS2368 Sampling and Testing of Wrought Titanium Raw Material Except Forgings and Forging Stock AMS2642 Structural Examination of Titanium Alloys Etch-Anodize Inspection Procedure AMS2750 Pyrometry AMS2809 I
12、dentification Titanium and Titanium Alloy Wrought Products ARP1917 Clarification of Terms Used in Aerospace Metals Specifications AS4194 Sheet and Strip Surface Finish Nomenclature AS6279 Standard Practice for Production, Distribution, and Procurement of Metal Stock 2.2 ASTM Publications Available f
13、rom ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428 -2959, Tel: 610-832-9585, www.astm.org. ASTM A480/A480M General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip ASTM E8/E8M Tension Testing of Metallic Materials ASTM E21
14、 Elevated Temperature Tension Tests of Metallic Materials ASTM E112 Determining Average Grain Size ASTM E290 Bend Testing Material for Ductility ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Technique ASTM E1447 Determination of Hydrogen in T
15、itanium and Titanium 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
16、 Coupled Plasma Atomic Emission Spectrometry SAE INTERNATIONAL AMS4897D Page 3 of 8 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 nitr
17、ogen 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 Element min max Molybdenum 14.0 16.0 Aluminum 2.5 3.5 Columbium (Niobium) 2.4 3.2 Silicon 0.15 0.25 Oxygen 0.11 0.15 Carbon
18、 - 0.05 Iron - 0.40 Nitrogen - 0.05 (500 ppm) Hydrogen - 0.015 (150 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 Check Analysis Composition variations shall meet the applicable requirem
19、ents 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 melting practice. The subsequent melt or melts shall be made under vacuum using vacuum arc
20、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 tip for nonconsumable electrod
21、e melting shall be water-cooled copper. 3.3 Condition Rolled, solution heat treated, descaled, and leveled, having a surface appearance comparable to a commercial corrosion-resistant steel No. 2D finish (see 8.2). 3.4 Solution Heat Treatment Except as specified in 3.4.1, product shall be solution he
22、at treated by heating to a temperature within the range 1500 to 1650 F (816 to 899 C), holding at the selected temperature within 25 F (14 C) for 3 to 30 minutes, and cooling at a rate that will produce product meeting the requirements of 3.5 (see 8.3). Pyrometry shall be in accordance with AMS2750.
23、 3.4.1 Continuous Heat Treating of Sheet and Strip Process parameters (e.g., furnace temperature set points, heat input, travel rate, etc.) for continuous heat treating lines shall be established by the material producer and validated by testing of product to requirements of 3.5. SAE INTERNATIONAL A
24、MS4897D Page 4 of 8 3.5 Properties The product shall conform to the following requirements: 3.5.1 As Solution Heat Treated 3.5.1.1 Tensile Properties Shall be as shown in Table 2 for product 0.125 inch (3.18 mm) and under in nominal thickness, determined in accordance with ASTM E8/E8M with the rate
25、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 - Room-temperature tensile properties Property Value Tensile Strength 120 to 145 ksi (827 to 1000 MPa) Yield Str
26、ength at 0.2% Offset 115 to 140 ksi (793 to 965 MPa) Elongation in 2 Inches (50.8 mm), min 8% 3.5.1.2 Bending Product 0.125 inch (3.18 mm) and under in nominal thickness, shall have a test sample prepared nominally 0.750 inch (19.06 mm) in width, with its axis of bending parallel to the direction of
27、 rolling. The sample shall be bend tested in conformance with the guided bend test defined in ASTM E290 through an angle of 105 degrees. The test fixture supports shall have a contact radius 0.010 minimum, and the plunger shall have a radius equal to the bend factor shown in Table 3 times the nomina
28、l thickness. Examination of the bent sample shall not show evidence of cracking when examined at 15 to 25X magnification. Table 3 - Bending parameters Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor Up to 0.070, incl Up to 1.78, incl 3 Over 0.070 to 0.125, incl Over 1.78 to 3.18, in
29、cl 3.5 3.5.1.3 Surface Contamination The product shall be free of any oxygen-rich layer, such as alpha case, or other surface contamination, determined by the bend test of 3.5.1.2, by microscopic examination at not lower than 400X magnification, or by other method acceptable to purchaser. 3.5.1.4 Mi
30、crostructure Shall be greater than 80% recrystallized beta grains (see 8.4.2), determined by optical examination at not lower than 100X magnification after decoration aging (see 8.4.3) a representative specimen at 900 F (482 C) for 1 to 2 hours. Silicides are an intrinsic feature of this product and
31、, therefore, shall not be cause for rejection. Specimens shall be polished and etched as in AMS2642 or by other suitable polishing and etching techniques. 3.5.1.5 Average Grain Size Shall be as shown in Table 4, determined in accordance with ASTM E112. Table 4 - Average grain size Nominal Thickness
32、Inch Nominal Thickness Millimeters ASTM Grain Size Number Up to 0.100, incl Up to 2.54, incl 6 Over 0.100 to 0.125, incl Over 2.54 to 3.18, incl 4 SAE INTERNATIONAL AMS4897D Page 5 of 8 3.5.2 Response to Heat Treatment Product 0.125 inch (3.18 mm) and under in nominal thickness shall meet the requir
33、ements of Table 5, Table 6, Table 7, and Table 8, after precipitation heat treatment as in 3.5.2.1 or 3.5.2.2 as applicable. Room temperature tensile tests shall be determined in accordance with ASTM E8/E8M with the rate of strain set at 0.005 inch/inch/minute (0.005 mm/mm/minute) and maintained wit
34、hin a tolerance of 0.002 inch/inch/minute (0.002 mm/mm/minute) through the 0.2% offset yield strain. 3.5.2.1 Product shall conform to requirements shown in Table 5 and Table 6 after being heated to 1100 F 10 F (593 C 6C), held at heat for 8 hours 0.5 hours, and cooled in air. 3.5.2.1.1 At Room Tempe
35、rature Shall be as shown in Table 5, determined in accordance with ASTM E8/E8M and 3.5.2. Table 5A - Minimum room temperature tensile properties, inch/pound units Grain Direction Ultimate Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation % Longitudinal 144 136 5 Transverse 147 138 5
36、Table 5B - Minimum room temperature tensile properties, SI units Grain Direction Ultimate Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation % Longitudinal 993 938 5 Transverse 1014 951 5 3.5.2.1.2 At 900 F (482 C) Shall be as shown in Table 6, determined in accordance with ASTM E21 o
37、n specimens heated to 900 F 5 F (482 C 3 C), held at heat for 20 to 30 minutes before testing, and tested at 900 F 5 F (482 C 3 C). Table 6 - Minimum tensile properties at 900 F (482 C) Property Value Tensile Strength 95 ksi (655 MPa) Yield Strength at 0.2% Offset 75 ksi (517 MPa) Elongation in 2 In
38、ches (50.8 mm) 15% 3.5.2.2 Product shall conform to requirements shown in Table 7 and Table 8 after being heated to 1275 F 10 F (691 C 6 C), held at heat for 8 hours 0.5 hours, cooled in air, reheated to 1200 F 10 F (649 C 6 C), held at heat for 8 hours 0.5 hours, and cooled in air. 3.5.2.2.1 At Roo
39、m Temperature Shall be as shown in Table 7, determined in accordance with ASTM E8/E8M and 3.5.2. Table 7A - Minimum room temperature tensile properties, inch/pound units Grain Direction Ultimate Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 Inches % Longitudinal 125 115 6 Tr
40、ansverse 125 115 5 SAE INTERNATIONAL AMS4897D Page 6 of 8 Table 7B - Minimum room temperature tensile properties, SI units Grain Direction Ultimate Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 50.8 mm % Longitudinal 862 793 6 Transverse 862 793 5 3.5.2.2.2 At 1100 F (593 C) S
41、hall be as shown in Table 8, determined in accordance with ASTM E21 on specimens heated to 1100 F 5 F (593 C 3 C), held at heat for 20 to 30 minutes before testing, and tested at 1100 F 5 F (593 C 3 C). Properties shown apply to both the longitudinal and transverse grain orientation. Table 8 - Minim
42、um tensile properties at 1100 F (593 C) Property Value Tensile Strength 60 ksi (414 MPa) Yield Strength at 0.2% Offset 49.0 ksi (338 MPa) Elongation in 2 Inches (50.8 mm) 17% 3.5.3 Mechanical property requirements for product outside the size range covered by 1.1 shall be agreed upon between purchas
43、er and producer. 3.6 Quality The product, as received by purchaser, shall be uniform in quality and condition, sound, and free from “oil cans“ (see 8.4.1) of depth in excess of the flatness tolerances, ripples, and foreign materials and from imperfections detrimental to usage of the product. 3.7 Tol
44、erances Except for flatness, shall conform to all applicable requirements of AMS2242. 3.7.1 Flatness shall be as shown in Table 9 Table 9 Maximum deviation from a horizontal flat surface Specified Thickness Variation from Flat Inch Millimeters Inch Millimeters Up to 0.062, excl Up to 1.57, excl 2 51
45、 0.062 to 0.1875, excl 1.57 to 4.762, excl 1 25 3.8 Production, distribution, and procurement of metal stock shall comply with AS6279. This requirement becomes effective September 1, 2017. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The producer of the product shall supply all
46、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 specified requirements. 4.2 Classification of Tests All technical req
47、uirements are acceptance tests and shall be performed on each heat or lot as applicable. SAE INTERNATIONAL AMS4897D Page 7 of 8 4.3 Sampling and Testing Shall be in accordance with AMS2368 and the following; a lot shall be all product of the same nominal size from the same heat processed at the same
48、 time and in the same heat treatment batch. 4.3.1 Composition One sample from each heat, except that for hydrogen determinations one sample from each lot obtained after thermal and chemical processing is completed. 4.3.2 Tensile Properties, Bending, Grain Size, Surface Contamination, and Microstructure One or more samples from each lot for each requirement. 4.3.2.1 Specimens for tensile tests of widths 9 inches (229 mm) and over shall be taken a
