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Hydrogen Embrittlement of Ni3Al at Various Hydrogen Contents and Strain Rates

  • Huaxin Li (a1) and T. K. Chaki (a1)

Abstract

Hydrogen embrittlement has been studied in continuous cast sheet of a Ni 3 Alalloy (NI 77.83 AL 21.73 ZR 0.34 B 0.1), known as IC-50, after introducing various amounts of hydrogen cathodically. The elongation and UTS decreased with the increasing content of hydrogen. When tensile-tested at a strain rate of 5.8 × 10−5 s−1, the elongation decreased from 32.7% for no charging to 1.9% for 330 min of charging with 50 mA cm−2 current. The yield stress, however, did not change. When tested at a higher strain rate of 5.8 × 10−3 s−1, the embrittlement was less, but the yield stress increased with the hydrogen content. With increasing hydrogen content the fracture mode changed from dimpled to intergranular and cleavage modes.

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Hydrogen Embrittlement of Ni3Al at Various Hydrogen Contents and Strain Rates

  • Huaxin Li (a1) and T. K. Chaki (a1)

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