MIL-STD-868B CHANGE 2
c. The specimens will be subjected to 200 hours of static loading at 75 percent of the ultimate notched tensile strength. The test shall be considered passed if all four (4) specimens meet the requirement of paragraph 4.5.
d. Upon successful completion of the static load test one of the notched tensile specimens shall be sectioned across the notch parallel to the axis of the specimen. Photo-micrographs shall be taken of the notched area and examined for complete coverage of the notch (use 80 -180 magnifications).
5.7.1 Analysis report. When and as requested a complete analysis report of the plating bath shall be submitted to the procuring activity with the qualification tests.
5.8 Process control embrittlement acceptance test. The process control embrittlement acceptance test shall be as follows:
a. Two (2) standard specimens of the type noted in paragraph 5.7.a shall be plated per paragraph 5.7.b in conjunction with the plating of items. The specimens shall be subjected to a sustained load test of 75 percent of the ultimate notched tensile strength of the material for two hundred (200) hours minimum and shall meet the requirement paragraph 4.5. Failure of any one of these specimens shall constitute failure of the test and production shall cease until the bath is re-qualified. Acceptance of items completed after the last successfully completed acceptance test shall be withheld until the extent and cause of failure has been determined.
b. The test for embrittlement shall be conducted as often as deemed necessary with a maximum interval of every thirty (30) calendar days. If the embrittlement test has not been performed in the thirty (30) proceeding the processing of the material batch, the bath must be re-qualified in accordance with paragraph 5.7.
5.8.1 Hydrogen detection instrument testing. Hydrogen detection instrument testing can be used for the process control testing with the approval of the procuring activity.
5.9 Safety and health. This document specifies the use of certain materials, which have been listed in 29 CFR 1910 (OSHA Standards) as "Toxic and Hazardous Substances." Personnel exposure to these materials during the process must be limited to the values specified in applicable portions of the OSHA Standard 1910.1000.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but not mandatory.)
6.1 Intended use. This standard provides guidance on the processes and procedures for low embrittlement nickel electro-deposition for the repair of existing or procurement of new parts on the landing gear for all military aircraft. It may be used for other applications where low embrittlement disposition is desired.
6.2 Subject term (key word) listing.
Classification
8
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