The effective H permeability was determined in various body-centered cubic materials. The phase stability of the Ti alloy, and its hydride-forming tendency, precluded the obtention of valid results (table 174) at higher temperatures and H pressures.

On the Effective Hydrogen Permeability in Metastable Beta Titanium Alloy, Niobium and 2.25CM Mo Ferritic Steel. T.P.Perng, C.J.Altstetter: Metallurgical Transactions A, 1986, 17[11], 2086-90

 

Table 174

Permeation of H in Ti-13V-11Cr-3A1

 

Temperature (C)

Permeability (cm3/cm s Pa½)

400

3.87 x 10-10

375

1.47 x 10-10

350

7.73 x 10-11

325

2.28 x 10-11