Abstract
Tensile ductilities of undoped and boron-doped Ni3Al have been determined under H2 and H2O pressures in the range of 10−3 ~ 103Pa. In agreement with other studies, boron-doped Ni3Al was found to be insensitive to water vapor, while undoped Ni3Al is severely embrittled by water vapor at pressures greater than about 10−3Pa. This observation is consistent with previous conclusions that the ductilizing effect of boron additions in Ni3Al is at least partly due to its remedial effect on embrittlement by environmental water vapor.
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