Slow Strain Rate Testing of High Strength Low-Alloy Steels: A Technique for Assessing the Degree of Hydrogen Embrittlement Produced by Plating Processes, Paint Strippers and other Aircraft Maintenance Chemicals
AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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This work demonstrates how a slow-strain rate tensile test can be used to quantify rapidly in a statistically rigorous manner the severity of hydrogen embrittlement produced in high strength 4340 steel by paint strippers and plating processes. The results of multiple slow strain rate tests conducted at a crosshead displacement rate of .0002 mms using notched specimens in various paint strippers show that a minimum mean fracture stress and maximum standard deviation can be defined that correlates with the passfail criterion in standard notched C-ring tests. The advantages of using a slow strain test as a viable alternative to existing standard methods for hydrogen embrittlement testing are discussed.
- Metallurgy and Metallography
- Test Facilities, Equipment and Methods