Research Article
Hydrogen Effect on Cumulation of Failure, Mechanical Properties, and Fracture Toughness of Ni-Cr Alloys
Table 2
Characteristics of the 05Cr19Ni55 alloy modifications at 293 K and displacement rate 0.1 mm/min.
| | No. of order | Orientation | Heat treatment | d (μm) | t (mm) | K1c (Jc) (MPa·m1/2) | CH (wppm) | σu | σys | δ | ψ | Kc (MPa·m1/2) | βψβKc | | MPa | % |
| | 1 | TV | OM. Quenching (Q): 1323 K, 1 h
Aging (A): 1023 K, 15 h, +923 K, 10 h (HT I) | 85 | 20 | 86 | 25 | 920/930 | 570/570 | 10/2.5 | 12/4.5 | 69/28 | 0.38/0.32 | | 2 | LT | OM, HT I | 85 | 20 | 107 | 25 | 1020/970 | 590/600 | 14/4.5 | 18/8 | 88/38.5 | 0.44/0.36 | | 3 | LT | VAR, HT I | 85 | 20 | 128 | 22 | 1050/1010 | 620/610 | 20/6 | 32/15 | 98/51 | 0.47/0.40 | | 4 | LT | OM. Q: 1253 K, 1 h. A: 1023 K, 15H, +923, 10 h (HT II) | 21 | 20 | 119 | 27 | 1040/990 | 610/610 | 17/5 | 20/9 | 94/45 | 0.45/0.38 | | 5 | LT | VAR, HT II | 21 | 20 | 162 | 24 | 1080/970 | 650/660 | 35/6 | 38/19 | 116/68 | 0.50/0.42 | | 6 | LT | VAR, HT II | 21 | 25 | 162 | 24 | 1080/970 | 650/660 | 35/6 | 38/19 | 126/64 | 0.50/0.40 | | 7 | LT | VAR, after HT II simulation of soldering 1283 K, 15 min, A:
973 K, 10 h (HT III) | 36 | 10 | 138 | 21 | 1180/960 | 710/690 | 30/5 | 34/16 | 103/62 | 0.47/0.45 | | 8 | LT | VAR, HT III | 36 | 20 | 138 | 21 | 1180/960 | 710/690 | 30/5 | 34/15 | 108/52 | 0.44/0.38 | | 9 | LT | VAR, after HT II simulation of soldering 1473 K, 15 min + 1273 K, 1 h (HT IV) | 130 | 20 | — | 23 | 750/700 | 380/390 | 41/16 | 31/18 | — | 0.58/— |
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TV: transverse orientation; LT: longitudinal orientation; OM: open melting; VAR: vacuum arc remelting; d: grain size; t: thickness of the specimen. βψ = ψhydr/ψair; βКС = Kc hydr./KIc(Jc) air.
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