Page 43 - The Effect of Hydrogen and Hydrides - ebook first test

∙

( ) = ⊥ − ⋅ ∙

∙

( ) = ∥ − ⋅ ∙ = − ⋅ ∙

∥

= 0
∥
∆ ( )

∆ ( ) = ( ) − ( ) = ⋅ ( ⊥ − ⋅ [ − ])

≈ 1 − = 0.0213

= 0.172 = 0.9867

⊥

= 1.5

− = 0.0213 ∆ ( ) = 0.0936

∗
= 2.008 ×

10 −27 m 3 = 558.1 K

Table 3-4: Effect of external circumferential (hoop) tensile stress on % radial hydride fraction, . (Starting from 2%

radial hydride for the externally unstressed tube material.)
Circumferential (Hoop) Tensile Stress,  (MPa) ( , %), % Radial Hydrides

0 2
40 5
80 13
120 27
160 50
200 73

240 88
280 95
320 98
360 99

400 100
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