From: Mechanism and Method of Testing Fracture Toughness and Impact Absorbed Energy of Ductile Metals by Spherical Indentation Tests
Material
No.
KV2i (J)
KV2 (J)
KV2i /KV2( ηi )
(%)
S30408
1
21.75757
307
7.09
2
22.05407
314
7.02
SA508-3
16.18597
193
8.34
18.26295
184.5
9.90
Q345R
11.63808
6.03
13.09879
191
6.86
18MnMoNbR
17.4609
237
7.37
17.82138
227
7.85