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Table 7 Comparison between the calculated value KV2S and the experimental value KV2

From: Mechanism and Method of Testing Fracture Toughness and Impact Absorbed Energy of Ductile Metals by Spherical Indentation Tests

Material

No.

KV2 (J)

JID

(N/mm)

KV2i

(J)

(η = ηi )

(η = 9.9%)

KV2S

(J)

\(\frac{{KV_{{{\text{2S}}}} - KV_{{2}} }}{{KV_{{2}} }}\)(%)

KV2S

(J)

\(\frac{{KV_{{{\text{2S}}}} - KV_{{2}} }}{{KV_{{2}} }}\)(%)

S30408

1

307

260.48

22.72

320.62

4.44

231.87

− 24.47

2

314

248.18

24.31

346.21

10.26

248.13

− 20.98

SA508-3

1

193

310.64

17.35

206.89

7.20

177.05

− 8.266

2

184.5

273.94

21.10

213.19

15.55

215.34

16.71

Q345R

1

193

344.34

14.76

244.75

26.81

150.60

− 21.97

2

191

336.18

15.31

223.29

16.89

156.24

− 18.20

18MnMoNbR

1

237

386.26

12.68

172.06

− 27.40

129.35

− 45.42

2

227

353.29

14.21

180.98

− 20.27

144.98

− 36.13