ASTM F945-01

Standard Test Method for Stress-Corrosion of Titanium Alloys by Aircraft Engine Cleaning Materials

SCOPE
1.1 This test method establishes a test procedure for determining the propensity of aircraft turbine engine cleaning and maintenance materials for causing stress corrosion cracking of titanium alloy parts.  
1.2 The evaluation is conducted on representative titanium alloys by determining the effect of contact with cleaning and maintenance materials on tendency of prestressed titanium alloys to crack when subsequently heated to elevated temperatures.  
1.3 Test conditions are based upon manufacturer's maximum recommended operating solution concentration.  
1.4 This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see 5.3 and 5.6.

General Information

• Status: Historical
• Publication Date: 09-Nov-2001
• ICS: 49.025.30 - Titanium
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.07 - Qualification Testing of Aircraft Cleaning Materials

Relations

• Replaces: ASTM F945-98 - Standard Test Method for Stress-Corrosion of Titanium Alloys by Aircraft Engine Cleaning Materials
• Effective Date: 10-Nov-2001
• Replaced By: ASTM F945-06 - Standard Test Method for Stress-Corrosion of Titanium Alloys by Aircraft Engine Cleaning Materials
• Effective Date: 01-Apr-2006
• Referred By: ASTM D6361/D6361M-98(2020) - Standard Guide for Selecting Cleaning Agents and Processes
• Effective Date: 10-Nov-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F945–01
Standard Test Method for
Stress-Corrosion of Titanium Alloys by Aircraft Engine
1
Cleaning Materials
This standard is issued under the fixed designation F 945; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Chemical solutions and compounds used for preinspection cleaning or for preservation of titanium
alloy aircraft turbine engine parts shall be subject to qualification requirements of this test method.
1. Scope 3. Significance and Use
1.1 This test method establishes a test procedure for deter- 3.1 Because of the tendency of prestressed titanium alloy
mining the propensity of aircraft turbine engine cleaning and parts to crack if heated while in contact with certain chemical
maintenance materials for causing stress corrosion cracking of reagents, it is necessary to ensure that cleaning and mainte-
titanium alloy parts. nance materials will not initiate stress corrosion of titanium
1.2 The evaluation is conducted on representative titanium alloys under controlled conditions. For test specimens, two
alloys by determining the effect of contact with cleaning and common titanium alloys are selected, one that is very suscep-
maintenance materials on tendency of prestressed titanium tible (AMS 4916) and one that is not very susceptible (AMS
alloys to crack when subsequently heated to elevated tempera- 4911) to stress corrosion cracking.
tures.
4. Apparatus
1.3 Test conditions are based upon manufacturer’s maxi-
4.1 Measuring Device capable of linear measurement with
mum recommended operating solution concentration.
1.4 This standard does not purport to address all of the a 60.01-in. (60.25-mm) tolerance.
5
4.2 Press Forming Apparatus with 0.56-in. (14-mm) di-
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- ameter mandrel capable of producing approximately 65° bends
in 0.050-in. (1.25-mm) titanium alloy sheet specimens.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific 4.3 Beakers or Small Tanks for containment of cleaning,
rinsing, and test solutions, appropriately lined to prevent
precautionary statements, see 5.3 and 5.6.
contamination of the solutions by container materials.
6
2. Referenced Documents
4.4 Vise, capable of precise manipulation at jaw opening of
2.1 ASTM Standards: 0.65 in. (16.5 mm).
2 7
D 740 Specification for Methyl Ethyl Ketone 4.5 Air Circulation Furnace capable of operating at 900°F
2
D 841 Specification for Nitration Grade Toluene (480°C) with control to 620°F (10°C).
3 8
D 1193 Specification for Reagent Water 4.6 Magnifier capable of 20-diameters magnification.
9
2.2 SAE Aerospace Material Specifications: 4.7 Microscope capable of 500-diameters magnification.
4
AMS 4911 Sheet, Strip and Plate-6AL-4V Annealed 4.8 Bolt, stainless steel, 0.25-in. (6-mm) diameter with
AMS 4916 Sheet, Strip, and Plate-8AL 1MO 1V, Duplex stainless steel washers and nut.
4
Annealed
1 5
This test method is under the jurisdiction of ASTM Committee F07 on Alaboratory bench hydraulic press ENER PAC Model No. P-39 manufactured
Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.07 on by Black Hawk Industrial Products, Butler, WI, has been found satisfactory.
6
Qualification Testing of Aircraft Cleaning Materials. A standard sheet metal worker’s vise with a 3-in. jaw has been found
Current edition approved Nov. 10, 2001. Published November 2001. Originally satisfactory.
7
published as F 945 - 85. Last previous edition F 945 - 98. A Blue M Electric Co. POM-6680F-1 furnace has been found satisfactory.
2 8
Annual Book of ASTM Standards, Vol 06.04. A Bausch and Lomb Stereo Zoom 4 Model KVB-73 has been found
3
Annual Book of ASTM Standards, Vol 11.01. satisfactory.
4 9
Available from Society of Automotive Engineers, 400 Commonwealth Dr., A Bausch and Lomb Micro Zoom Catalog No. 31-19-30-02 has been found
Warrendale, PA 15096. satisfactory.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F945
4.9 Test Specimens, AMS 4911 and AMS 4916 Titanium stock solution into a 100–mLvolumetric flask. Fill to the mark
Alloys—with specimens prepared from the same sheet stock with 2-propanol and mix.
for each alloy and cut parallel to the rolling direction to the
5.5.2 Preparation of 3 Weight % Sodium Chloride in 2–Pro-
dimensionsofFig.1.Thespecimenedgesshallnotbedeburred
panol (Shelf Life Three Months)—Weight 3.
...