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 2017 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:/standards.sae.org/AMS2368D AEROSPACE MATERIAL SPECIFICATION AMS2368 REV. D Issued 1995-04 Revised 2017-03Supersed
5、ing AMS2368C Sampling and Testing of Wrought Titanium Raw Material Except Forgings and Forging Stock RATIONALE AMS2368D results from a Five-Year Review and update of this specification. 1. SCOPE 1.1 Purpose This specification provides a standard set of procedures for sampling and testing to meet the
6、 requirements of material specifications for wrought titanium and titanium alloy products, except forgings and forging stock. It is applicable to the extent specified in a material specification. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order
7、 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 referenced document has been cancelled and no superseding document has been specified, the last published issue of
8、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 and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2249 Chemical Check Analysis Limits Titanium and Titanium Alloys AMS2631 Ul
9、trasonic Inspection Titanium and Titanium Alloy Bar, Billet and Plate AMS2632 Inspection, Ultrasonic, of Thin Materials 0.50 Inch (12.7 mm) and Under in Cross-Sectional Thickness AMS2634 Ultrasonic Inspection Thin Wall Metal Tubing AMS2801 Heat Treatment of Titanium Alloy Parts ARP1917 Clarification
10、 of Terms Used in Aerospace Metals Specifications SAE INTERNATIONAL AMS2368D Page 2 of 6 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
11、 ASTM E10 Brinell Hardness of Metallic Materials ASTM E18 Rockwell Hardness of Metallic Materials ASTM E21 Elevated Temperature Tension Tests for Metallic Materials ASTM E112 Determining Average Grain Size ASTM E139 Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials ASTM
12、 E290 Bend Testing of Material for Ductility ASTM E292 Conducting Time-for-Rupture Notch Tension Tests of Materials ASTM E384 Microindentation Hardness of Materials ASTM E399 Linear-Elastic Plane-Strain Fracture Toughness KICof Metallic Materials ASTM E539 Analysis of Titanium Alloys by X-Ray Fluore
13、scence Spectrometry ASTM E1304 Plane-Strain (Chevron Notch) Fracture Toughness of Metallic Materials ASTM E1409 Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by Inert Gas Fusion ASTM E1447 Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Therma
14、l Conductivity/Infrared Detection Method ASTM E1450 Tension Testing of Structural Alloys in Liquid Helium 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 Indu
15、ctively Coupled Plasma Atomic Emission Spectrometry ASTM E2994 Analysis of Titanium and Titanium Alloys by Spark Atomic Emission Spectrometry and Glow Discharge Atomic Emission Spectrometry 3. TECHNICAL REQUIREMENTS 3.1 General 3.1.1 Conformance The producer shall be responsible for furnishing produ
16、cts that conform to all requirements of the material specification. Sampling and testing for any requirements not covered herein or in the material specification shall be optional, unless otherwise specified by purchaser. 3.1.1.1 Tests for properties that are characteristic of the heat, such as comp
17、osition, hardenability, cleanliness, need not be repeated on finished product from a heat provided that these tests have been performed on the stock from that heat and that heat identity of the material is maintained. SAE INTERNATIONAL AMS2368D Page 3 of 6 3.1.2 Lot A lot shall be all product of the
18、 same nominal size and shape, from the same ingot (heat), processed in the same manner, and presented for producers inspection at one time. When processing includes heat treatment, product shall have been heat treated in one or more furnaces in the same load or sequentially heat treated in a series
19、of furnaces (see 8.2) or a continuous furnace over not more than 48 hours providing there is no interruption in operations or change in furnace temperature setting(s), charge rate, or racking pattern. 3.1.3 Sampling and Testing 3.1.3.1 Composition Sampling and testing shall conform to 3.2.3. 3.1.3.2
20、 Other Properties Except as otherwise specified below, at least one test of each type shall be performed on specimens, located and oriented in accordance with 3.1.3.2.1 and 3.1.3.2.2, from a random sample from each lot. 3.1.3.2.1 Location of Specimens When practical, tests shall be performed on full
21、 thickness specimens. When the product is too thick for testing its full thickness, the center of the specimen shall be located at the center of the thickness of the product for sizes less than or equal to 1.5 inches (38 mm) and at the mid-radius or quarter thickness for sizes greater than 1.5 inche
22、s (38 mm) or least difference between parallel sides. Short transverse specimens shall be located at the middle of the width of the product. Transverse specimens for rounds shall be radial or tangential (or mid-radius chord) for product that a tensile specimen not less than 2.50 inches (63.5 mm) in
23、length can be obtained. Specimens from flash welded rings shall not include the weld or heat affected zone (see 8.5). 3.1.3.2.2 Orientation of Specimens Shall be tangential for flash welded rings and longitudinal for other products unless a specific test direction is referenced in the material speci
24、fication, then the test direction listed in the material specification takes precedence. Stock for flash welded rings shall be tested longitudinally. 3.2 Tests (In Alphabetical Order) 3.2.1 Bending 3.2.1.1 Bend tests shall be performed using the U-channel or free bend procedure in accordance with AS
25、TM E290. In case of dispute, the free bend procedure shall govern. Inspection shall be at either 1X or 10X. 3.2.1.2 The axis of bend shall be parallel to the direction of rolling (transverse specimen). 3.2.1.3 Width of specimens shall be 10 times the nominal thickness of the product or 1 inch (25 mm
26、), whichever is greater, except that for free bend tests the width need not be greater than 1 inch (25 mm). 3.2.2 Coiling Tests shall be performed on two samples from each lot. SAE INTERNATIONAL AMS2368D Page 4 of 6 3.2.3 Composition 3.2.3.1 Consumable Melted Ingots and Cold Hearth Melted Ingots Com
27、position, except for hydrogen, shall be determined at the top and bottom of each ingot in accordance with ASTM E1941 for carbon, ASTM E1409 for oxygen and nitrogen, and other elements by other analytical methods in accordance with ASTM E2371, ASTM E539 or ASTM E2994. Other analytical methods can be
28、used if acceptable to purchaser. Each analysis shall meet the composition requirements; both the top and bottom ingot analyses or average of the analyses shall be reported. Hydrogen content shall be determined, in accordance with ASTM E1447 or other method acceptable to purchaser, on a random sample
29、 from each lot after completion of all thermal and chemical processing. 3.2.3.2 Nonconsumable Melted Ingots Composition shall be determined as specified in 3.2.3.1; it shall also be determined at three additional ingot locations; the middle, midway between the middle and the bottom, and midway betwe
30、en the middle and the top. 3.2.3.3 Check Analysis Composition variations shall meet the requirements of AMS2249. 3.2.4 Creep Tests shall conform to ASTM E139. 3.2.5 Fracture Toughness The product shall be subject to fracture toughness testing on specimens from two locations oriented in the T-L direc
31、tion. There is no recognized standard for fracture toughness testing of sheet, strip, and plate under 1/2 inch (12.7 mm) thick. Method of test and acceptance standards shall be as specified by the purchaser. Procedure for thicker product shall conform to ASTM E399 or, when permitted by purchaser, AS
32、TM E1304. 3.2.6 Average Grain Size Shall be determined by comparison of a polished and etched longitudinal specimen in accordance with ASTM E112. 3.2.7 Hardness Shall be determined in accordance with ASTM E10 or ASTM E18. 3.2.8 Heat Treatment Response Heat treatment of samples, to confirm that produ
33、ct will develop required properties, shall conform to AMS2801 when requirements are not designated in the material specification. 3.2.9 Microstructure Shall be determined by examination of a polished and etched longitudinal or transverse specimen at 100X magnification. Round bar may be examined imme
34、diately prior to grinding or turning to final size. 3.2.10 Stress Rupture, Notched Tests shall conform to ASTM E292. 3.2.11 Surface Contamination Freedom from surface contamination, such as alpha case, shall be determined by bending in accordance with 3.2.1.1, or by microscopic examination at 400X m
35、inimum magnification, or by microhardness testing, using a 200 g load, in accordance with ASTM E384 or by other method agreed upon by purchaser and producer. SAE INTERNATIONAL AMS2368D Page 5 of 6 3.2.12 Tensile Tests 3.2.12.1 Room Temperature Shall be performed in accordance with ASTM E8/E8M with t
36、he rate of strain set at 0.005 in/in/min (0.005 mm/mm/min) and maintained within a tolerance of 0.002 in/in/min (0.002 mm/mm/min) through the 0.2% offset yield strain. 3.2.12.2 Elevated Temperature Tests shall be performed at the designated temperature in accordance with ASTM E21. 3.2.12.3 Low Tempe
37、rature Tests shall be performed at -423 F (-253 C) in accordance with ASTM E1450. 3.2.13 Ultrasonic Inspection Shall be performed on all pieces in a lot in accordance with AMS2631, AMS2632, or AMS2634. Acceptance class shall be agreed upon by purchaser and producer unless designated in the material
38、specification. If product passes a more stringent class than required by AMS2631, AMS2632, or AMS2634, there is no need to re-test or re-certify if the specification requirement is less stringent (e.g., inspection to Class AA satisfies a Class A1 requirement). 3.2.14 Wrapping Tests shall be performe
39、d on two samples per lot. 3.3 Resampling and Retesting If results of any valid test fail to meet the specified requirements, disposition of the product may be based on the results of retests. The retests shall consist of tests of three additional specimens, of the same type and orientation, and from
40、 as close as possible to the same location, for each original failed test. Failure of any retest to meet the specified requirements shall be cause for rejection of the lot. Results of all tests, including the failed test(s), shall be reported. Resampling and retesting does not apply to ultrasonic te
41、sting (3.2.13). 4. QUALITY ASSURANCE PROVISIONS Not applicable. 5. PREPARATION FOR DELIVERY Not applicable. 6. ACKNOWLEDGMENT Not applicable. 7. REJECTIONS Not applicable. SAE INTERNATIONAL AMS2368D Page 6 of 6 8. NOTES 8.1 Revision Indicator A change bar (l) located in the left margin is for the co
42、nvenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not u
43、sed in original publications, nor in documents that contain editorial changes only. 8.2 All product in the lot shall have been subjected to the same treatment in the same furnaces. 8.3 Terms used in AMS are clarified in ARP1917. 8.4 Dimensions and properties in inch/pound units and the Fahrenheit te
44、mperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.5 The European approach to this issue (see 3.1.3.2.1), is to locate the test-piece at mid-radius for diameters greater than 2.9 inches (75 mm). PREPARED BY AMS COMMITTEE “G”
