Published: Jan 1988
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The degree of hydrogen embrittlement produced in high-strength 4340 steel by various cadmium, cadmium-titanium, and nickel plating-and-baking procedures is assessed from fracture stress values obtained during slow strain rate tests using notched tension specimens. At low crosshead displacement rates, the slow strain rate method is capable of quantifying the degree of embrittlement produced by a variety of low-embrittlement, plating-and-baking procedures and is more sensitive than conventional test methods defined in standard specifications. The advantages of using a slow strain rate method as a viable alternative to existing standard methods for assessment of the degree of hydrogen embrittlement in plated-and-baked, high-strength steel are discussed.
low-alloy steel, high-strength steel, hydrogen embrittlement, strain rate, plating, cadmium coatings, nickel coatings
Pollock, William J.
Principal research scientist, Aeronautical Research Laboratory, Defence Science and Technology Organisation, Department of Defence, Melbourne,